• theTreeSpyder's Avatar
    1 Week Ago
    i think alignment to leg lift force point, directly against own CoG force point(male:approx. solar plexus, stomach brain, chakra, other oriental refs.) is key, and chest box helps/enforces. . This is my imagery of the extra energy needed to same task, when CoG downward force column is not squarely over lift force column (both linear gravity line) >>since the mis-aligned equal opposites are in compression, constantly fight side force pushing further out of alignment (tension would pull back inline w/side force) . . Thus greatest increase in work input is not the loss from small drop in efficiency, but rather the fight against runaway side force; to then work more to cover both efficency loass and carry sideforces ! Note how the smallest amount of deflection from inline drops column/support very little >> but side force builds immensely by comparison. >>These are some force effects contained in all rigid devices>>can get feel of war of forces usually only seen, and decode what all things 'feel'/forces borne at these simple offsets . Flexible devices only support inline, but carry side forces>>so need external side force to keep from aligning equal opposites >>can be side pull of another line or a matching angle of line like 2 angled legs of line to same pulley>>each leg's side force is ballast of other leg's etc.
    29 replies | 438 view(s)
  • theTreeSpyder's Avatar
    1 Week Ago
    If Chain Basket(2 support connections/ends to pulley), would stay away form flat teepee at connection, but would give round turn first around arm. Note arm seems square/rectangular not magic round shape of gradual receding cosine giving up to sine gradual exchange of forces from tension in chain device >>would put in anti-slide light rope uphill from chain, hill keeps from upward creep, restriction locks against downward creep/slide Will not grip same as round host support, can even try 2 leg support of prussic(but pulls off 1 side of rectangle support), would still consider anti slide locks of build. Other deformity could suffice as anti-slide down. want some slant in arm for force column anyway. Flat webbing could lay tight, low efficiency loss, but on other axis defame very easy on slide stop because very little strength on that minimal axis, super towing webbing strength probably over-rule that part of math though ; especially thicker, more power against deform. . Slow climb in DdRT back up, handling 2x as much rope as drop, more than usual windsway possible funneling out under bridge w/total exposure possibly wet.i'd think safety wise should evacuate on arm before car, if using same arm for support, as for as loading and other complications. . Of course could get lazy and ride on car.. This could bring liability questions and red flag from wrecker crew that (mite)never signs off on life support due to insurance coverage cyaPolicy etc.>>be prepared for said argument. .
    29 replies | 438 view(s)
  • theTreeSpyder's Avatar
    1 Week Ago
    theTreeSpyder replied to a thread Rope in Gear Forum
    Would favor high melting point for friction hitch, as this cord gets as much friction as all of host life line. Would be typically dividing load on that leg of host life line between both ends of Prusik collectively. >>See sample load 100# on one end of cord/other end secured as 100# to cord But pulls from both ends as only 50# tension on cord transferred to lifeline bearing full 100# tension hardness of full not half load. >>thus visualize 50# on 1 end of cord ballasted by 50# other end of cord. >>so 50# of force trying to grip tighter 100# leg>>doable by coil mechanic only >>visualize cord gripping steel pole to hold you type model Put more on your side by choosing cord that has better means to more dent host life line. >> more than just coils, look at no response as 100% strong, always look for a second stop mechanic , especially in life support. Let the hardness of cord work for this, even on higher tensioned host line grabbed. >>leave behind cord gripping 'firmer'(than cord) model, and raise mechanic to cord is as firm or firmer than the higher tensioned line it grabs. . Choose typically smaller diameter cord than host life line for same force funneled into smaller footprint of higher pressure. >>prefer stiffer , non elastic cord for less relief of these forces, less hard seating if stretched into coils, and less play/slop in system. Cord should then feel stiffer, harder than life line side by side, both relaxed. >>but still flexible enough to seat on host life line. . Would simply choose cord from lines offered for this, super especially if new. As generic like from boating catalogue would lean towards sta-set as a basic hard, strong, polyester, double braid. 50-75% of proposed host line diameter. . Something to be said for getting cords and ropes designed for task. Our Arborist lines are laid and sometimes even coated for our usages that would more quickly shred common lines. This environment has rigors and lessons like few other.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    2 Weeks Ago
    theTreeSpyder replied to a thread Rope in Gear Forum
    DEFINITELY, could use branch or tarp over each end to confound recoil Thanx!
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    2 Weeks Ago
    theTreeSpyder replied to a thread Rope in Gear Forum
    Very nice raw redneck power, nice reverse solution of large log length arc input into much smaller log diameter to concentrate effort input into smallest output movement >>for greatest power return from 2x crank arm length input position from axle axle(spooler) diameter . Usually do this kinda winch, as more vertical, Spanish Windlass perhaps capstan models. >>Plenty of larger arc input all the way around. But Horizontal Winch of same design runs larger input arc dead stop into ground >>but then flip/flop center axle, to reverse input direction AND KEEP OUTPUT DIRECTION as solution!! Also, power of wraps and turns on the 'drum' to leverage against tightness, prusic safety, real ods-cool seen this shown between saplings w/o side stakes(as option) . i specifically do not favor knot (~2:30-3:30) he calls Constrictor(??), not to frame (but probably has tow pkg. to bumper anyway but still prefer to frame round screw link forever kept in favorable hole usually for strong rounded face mount) but then to that thin, sharp/squared hole >>thought he was going for Adjustable Hitch (very favorable) but still prefer pulling on round face, direct to frame (at least to start thinking) . <iframe width="560" height="315" src="https://www.youtube.com/embed/QFDGGht3CQU" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> . i learned can to can't as what about a working farmer going from when can see, until couldn't. >>Then sometimes feeding, before/after . Later personally became this line that defined if could win or not inside, and what thing (to then focus on) made all the difference. >>Sometimes even handicapping self or overloading past normal to put self in that maze and see what it takes to get out etc. >>keeping up with biggers was part of it always and all ways; sometimes even then showing them how to move and do better. With imagery of strength of weaker is a more sensitive device to read and tune by, than one that can just overcome! Bigger tries to bulldawg every wall and win as always has, smaller looks to finesse, align, ballast and slip out after aligning windows as has always done. . Systems with fewest parts lends best to this of course>>As they even alone can show and highlight fail points already easiest etc. >>to me, this is one of those of minimal parts, real raw power display, ingenious reverse etc. Illustrating in very few parts, what every similar system needs, and a very smart solution, safetys etc.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    69/Zeppelin/Rosendahl excellent choice for nonJamming/re-usable Bend. >>Prefer triple-fisherman's for welding into a Prusic , never to be untied again security and profile. >>Olds-cool would go with DOUBLE SheetBend , if mix materials with any smaller OR denser cord being the locking hitch side rather than 'mounted bight' that could be 'fluffier' , fatter/looser when equivalently loaded. . In flat-rope webbing2webbing nonJamming like the What Knot as doesn't wander to unlocked in the flat device as easy as round. >>Actually wonderful lacing in many nonRound or mix of chain/chain, chain/rope, web/rope, web/chain of relative sizes. >>Simply 2 of Basic Hitch forms set to each other. Is trusted in round if seize ends back up to Standings, for going thru a ship port from dock etc. . Made this about walking up rope forces, in discussion on how much easier chest harness makes it by keeping Center of Gravity (CoG) as old more inline with lift of leg. . personal theory: Tension side force value pulls the equal opposites more inline >>but Compression side force value pushes equal opposites more out of line. By this measure are fighting the inefficiency, that system tries to make worser because is compression input to allowed sideforce so not only inefficient upward, but also fighting for CoG not to get further out of line, and if it does fight even more at less efficiency as chain of events. Chest harness seeks to take inefficiency from lift and negate sidewards fight fatigue as well. . This miss-alignment tax is more from sides force added, than lift efficiency lost! . As with any other system / chain of devices, system seeks to perform force column work against load(cosine); while trying to also sustain against side forces(sine).
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    Of course please try knots (DBY, Blake's, stoppers each end) and how they react etc. sitting on couch for hours first. Know your knots and materials before placing life in their hands. Steep, but workable hill is also safer practice than free fall height . >>should know knots REAL well, tend to look different in tree when have to put life on and sphincter suddenly awakens with NO vote.. . The stiffness felt fighting the other ropes to same knots in my imagery don't just make not seat as well for your purposes >>but would also say they weakened rope efficiency more, for they have tensions , not relaxed when start, just like metal or even own arm wouldn't hold as well starting from 'twerked' position. thus 'twerked' chain if didn't untwist would hold less etc. >>i look at load as multiplier of the present state. Also look at rope unloaded as in form-able/malleable state, but forges into tension only rod like on loading, and then subject to those rules . There is a SuiSlide to steer around as errant form of Blake's whose mechanix pull tail towards open, not closed! >>per coils' rotations on tail.
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    Can say same there as here; materials you are working in. . DBY and Blake's will lend self very well to common olds-cool arbo lines ArboPlex, True Blue, Tree Pro Red, Blue Streak, NE HyVee, even NE 3strand Safety Blue etc. >>1/2" 3strand NE for Blakes on braided 1/2" isn't a bad ride (IMHO). >>but perhaps not so well, in stiffer, harder line that neither seats well relaxed nor wants to keep in shape>>fighting you the whole way Just as both of these knots will work very well, to very cheaply illustrate in para-cord >>but not monofilament. >>can't make as many material irrelevant claims in flexible(vs. rigid) devices cuz the seating, elasticity etc. all are factors, that can vary. . Nipping Loop is the 2 end pull Half Hitch(like Killick HH on log before Timber) that locks Bowline; but split hairs and because forceFlow terminates and doesn't pass-thru i think the Nipping Loop is defined as NOT in a Sheet Bend by their view. Capstan Effect around 'SPart' (Standing Part) another new descriptor(s) Most i think are knudeKnoggin-isms, but assume some must be of Agent Smith. All in all a tremendous work continuing for years now, and a good draw and intro to other goodies. . Mountain/Rescue been saying nay to Bowline and more of a fig.8 crowd. >>large step for them to take so seriously AND they note on site several times about friendliness and trust-ability found in Arbo climb lines with this old friend. NOTE: the stiff (tho colorful) rope pictured in, IS too stiff for what i'd like to tie Bowline in >>for works against the turns, doesn't as easily lend itself as our climbing lines etc. To me like using the wrong tempered metal etc.; material doesn't lend itself easily to purpose. Bowline is not equally good in all mediums/materials used to carry the strategy; just cuz it is rope. >>should have the proper 'hand'/handling..
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    i see tight, harder lines trying to bite with cord of 1/2 tension legs cumulatively both pulls equal gripped line. i see force applied to Prusik as unit split into 2x half-loaded equal/opposites to grip full-loaded line together (after loading reduced further by frictions) >>Furthermore, i don't think any here would want to work Blake's back to self on a 'Stable Braid' type line >>Would adjust materials to the model presented, and proven friendly in this. . For me, this prev.posted oldie is another TOP classical work on rope forces: Note: how on ropeBrake even the 'twist' from turns to load is counted as part of 3,5,7 half circles/ radian pi's; totally adhering to degrees of contact model even then. Also:chart of progression of friction from 3,5,7 turns kinda imagined backwards to 1 turn /1 radian pi /180 degrees as more of a frictionalized slip and full circle/360degrees /2 radian pi or more getting into grip territory!(i think this explains A LOT of knots where adding a turn is a game changer. . Chart applys here, won't change coefficient(assume nylon on steel same nylon on nylon) just take each half of Prusik pulled at half load as each input into a 50x reduction calc. PER DEGREES OF CONTACT, not surface area >>that 50x has to show elsewhere (less friction coefficient ) for some kinda raw grip force feeding into Prusik. BUT ALSO, need the function of the Half-Hitch converter (ala Timber to Killik) AND Double Bearing (or better) that Prusik mechanic provides; for the VERY errant, NON-right angle pull on life line as a vertical column rather than properly at right angle as hanging down from horizontal beam. Prusik is ingenious combination of these mechanics to suit the needs presented.
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    YW! . May you say name or show pic of rope 'device' or type of line and cord using in these builds? >> mechanical builds Educated Climber.com Ashley Book of Knots (ABoK) chap_26 pre-Ramble: "But knotting is merely the application of certain mechanical principles, and a principle itself can hardly become obsolete. As conditions change, new applications are bound to appear. The fact that something is not required today is no reason for believing that it will not be needed tomorrow." . Are you trying Blake's with cord?? . Been tracing for hours on prusik cord diameter ratio to life line diameter and for hours and only find 1 (great)source listing 45-75% (actually i THINK used to quote out 45-80% here) Old CMC standard is 50-80% that ASSUMED tested or gathered data etc. Great resource:http://www.paci.com.au/knots.php >> project lead by 'Agent Smith' / Mark Gommers that stopped by TB briefly/recently. >>tried to intro idea of 200# man on a 7000# test line; knot strength is least of worries>> that didn't go over to well.. Much knudeNoggin in here too (Dan Lehman references) IF ASKED FOR PASSWORD ON ANYTHING ON SITE simply : 'thankyou' w/o quotes should do nicely! http://www.paci.com.au/downloads_public/knots/01_Knots.pdf >>prusiks start on pg.46 their OPINION on subject shows after tests on pg.50 >>In fact quote to 75% also but then show "risk of slippage and potential for catastrophic failure over 72%" Perhaps we should say 50-70% ? . The hardness analysis is kinda my view, so personally think we are assuming the harder laid than lifeline type common cords >>These maintain high strength in smaller package, but think also serves to make harder biting surface into softer even when prusik/biter is less loaded than host lifeline /bitee . There is a LOT of good info at this same site, including other prusik reports, Bowline is a large work. >>they have picked up on Bowline especially DBY being good in Arborist lines etc., even not friendliest in mountain/rescue more of a fig.8 crowd generally. . There are other good notable Arborist references too Treevolution Report . Ropes and Friction Hitches used in Tree Climbing Operations(Report authored by Paolo Bavaresco). Son of a Hitch: A Genealogy of Arborists’ Climbing Hitches - Mark Adams (TB) . TB pdf's probably has most old Arbo articles from TCI: The Mark Adams collection: http://treebuzz.com/pdf/climbing_hitches.pdf http://treebuzz.com/pdf/0505_geneology.pdf (as on PACI site) http://treebuzz.com/pdf/CC_Jun07.pdf (DdRT) http://treebuzz.com/pdf/CC_Aug07.pdf (DdRT part2) http://treebuzz.com/pdf/0505_slicktricks.pdf http://treebuzz.com/pdf/0505_moreslicktricks.pdf . and Tom Dunlap:http://treebuzz.com/pdf/SingleRope.pdf i think are most notable there. lxskllr, Sorry didn't throw this stuff earlier, as it does seem somewhat pertinent for your journey! Ain't much on Shakespeare, but am kinda well read here; as hope you will be! Ain't much here that you can capture all, in a single read; many reflections as you l-earn and come back to these same pages over time!
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    3 Weeks Ago
    i'm thinking Prussic should be more properly a percentage of host line diameter diff. rather than a set amount. >>i go with 50-75% >> but will try to find real research number. >>i go with model of want a harder lay and smaller diameter to give a harder package that the 2legs are pulled at half the tension of the line host life line trying to grip/dent So that hardness is key and line manufacture, loading and smaller footprint of loading in combinations can give this harder surface, even if less loaded, controlling the softer. . Try to find where you are at: Blake's is a single leg of line loading(vs. Prussic splits same load to 2 legs to grip a greater line tension) >> so would decrease Prussic cord size as a ratio, but more match host line diameter with Blake's as friction hitch strategy to grab a matching line tension i think is essential >>if done in the BASIC tree climbing style of terminate rope at saddle, then rope over support and back to saddle thru friction hitch should work >>Blakes tensions are half that of climber as load, BUT Blake's tension will match that of the 'dynamic side of the line that it grips that is also half loaded Tautline is similar mechanic of matching diameter line pulled by 1 leg, biting into a matching host leg of loading, hardness and diameter amounts >>MB's pic is of 1 over 2, would start on 2 over 2 Tautline Hitch setup tree to saddle as described . Would recommend :Basic start to be on same page 1/2" Arborist Climbing Line w/DBY few feet from end, whereby enough line coming out of short leg of DBY for Blake's back to line after over support. >>can upgrade to separate piece for Blake's, of same diam. as a wearable item of tail and also unlink to work around objects, reset etc. >>small krab etc. under hitch for easier tending upwards >>you note 12mm, close to 1/2" fairly, but suspect mountain/rescue line that is MUCH more elastic; and as i remember (30yr.ago) these knots don't seat same etc. to these purposes. >>more akin to your footlock prussic setup, but the excess stretch and bounce undesire-able. (At least that is what i remember of those ropes at that time) . Should always have lanyard, especially if repositioning support or doing any work aloft etc. Then maybe move up to Prussic on SRT as are doing after the DdRT(Single and doubled Rope Technique) is comfy >>What you are doing on folded line is differentiated as DRT for 2 legs used as 1 SRT
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    4 Weeks Ago
    Should not climb to TiP(Tie in Point) with line draped over support limb to prussic both legs as 1 >>cuz the line spread near top draws open hitch. >>hitch should hold, but when unloaded release with thumb action, then re-grip on command. The 'choked' Bowline wrote about earlier, does afford climbing to TiP, but more bounce, than doubled line. . i like preset friction hitch at right angle, then reverse direction, then lay down to intended direction. >>The hitch needs to be unloaded to slide >>Common tie to saddle, then over support then back to friction hitch slider on tail on saddle shifts load to the 'solid' leg when hitch pulled like a failing line on the dynamic side of the rig to afford the unloading of the hitch to slide. Many here started out like this, can go up or down on this rig. Other stuff like you are doing have to swap over to other strategy to descend as stated. . You can easily end up in totally preventable bad shituation possibly crippling or killing self; helplessly trapped in dangerous new land with clock ticking, just like novice scuba diver! This is stuff you have someone check out 1on1 and get more than a weekend grip to really be anywhere with it that counts. The above TiP scenario is 1 example, also is having 2 methods of attachment in failsafe fashion, as seen in many disciplines. Living long enough to tell the nurse you saw it on the internet won't impress her!
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    4 Weeks Ago
    To me, a prussic feeds 2 legs of pull of 1/2 bodyweight each, onto line that is pulled harder by full bodyweight>> thus harder to grip . So prefer the 50-75% diameter prussic cord formulae to give less footprint for harder pressure in that footprint >>and to same theory a harder layed cord design than lifeline.>>more grip on higher tensioned line by lesser tensioned line. . By doubling line have affected this some, now 2 legs of lifeline each loaded 1/2 bodyweight, but should be doable thru 'tuning' to your style and materials etc., perhaps different cord. . Can skip the doubled line and make running bowline; eye retrieved by other line or throw line. i would climb SRT like this, then pull Bowline open down to self with the pre-set rig line in eye. >>Switch over to DdRT for work and descent. i think DdRT is safer to start on, understand more, have 2:1 over own bodyweight, and 2x drop has to funnel thru hitch to fall. . Hitches slide easier in DdRT cuz when pull down on hitch, is like rope is failing, and bodyWeight auto shifts to other leg of line >>unloaded hitch of property type etc. slides easier and catches loaded >>once again if tuned right to you etc. .
    45 replies | 1355 view(s)
  • theTreeSpyder's Avatar
    07-17-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    . For screw links i prefer 7 screw threads, more than only 4 etc. >>Smaller diameter stock than standard carabiner for same strength Finger tight, might have to wrench loose. >>sometimes finger tight -1/8 turn so can't jam impact to seat past finger tight(hopefully)for production use exception would be remote or permanent use:seat strong. >>can also add Locktite, but has grit and input more torque for same seating.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    07-14-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Another Best/required reading, free online production is Life-On-a-Line Dr. D.F.Merchant A very passionate plea for rescue correctness, and the means to do so! Constantly come back to Pure Inline models of this correctness in all forms here too from educated author. . Stronger Fig.8 via softer arc thereby closer to straighter line(s) of support: . AMEN: ABSOLUTELY SAGE ADVICE FOR LINES AND THEIR BUILDS: . . Personally would give Spanish Windlass (tourniquet twister with stick) to tighten brace lines for stakes. >>But even in these extraneous examples, the Pure Inline mantra fits! . This and previous book / above Technical Paper BOTH, Very Strongly helped build my views and understandings of working rope. above Technical Paper: The Mechanics of Friction in Rope Rescue presented to International Technical Rescue Symposium 1999 by Stephen W. Attaway:GA.Tech Masters Structural Engineering + Computational Mechanics (modeling stresses, displacements) Ph.D. >>mostly for Porty friction model, to then extend to ALL knots, but then also sift out some yin-yang/reciprocal force of grip on host math in the successive half circles quoted (friction co-efficient removed) to explain differences shown AND as a separate exploitable/valuable item of it's own inside the secret world and force lines of knots, et all working rope. . Even the 2nd best selling MILLENNIUMS old text in the world of all time and likewise core of human thought and development stands as: "Euclid's Elements" (of Math, Geometry, Logic etc.) points to sifting to straight line models! >>#1 strategy of digestion and sorting; and what to chase thru there lists as: i find the 'Pure Inline' mantra here too. Seems like they were talking about us: force, rope, wood, straight lines etc.! . educatedclimber.com/ashley-book-knots/ (.pdf) remains the best all around reference; now seen online. But, the books above present more openly the base , 'abstracted' principles for weighing and measuring all rope works for me; that i always try to more manually sift and 'abstract'; on own from Ashley; to these the fewest to remember as most deep, pivotal points.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    07-02-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    More hook imagery as decision making field guides:
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    06-24-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    My 'hook' imagery of proper right angle support of rope pull as ABoK shows as best >>Then multiple bearings (not solo) of pull for 'lengthwise' pulls as an errant angle of pull. . Replacing the rope hug effect of sides collapsing in to support (like rigid metal doesn't)with steel no hug >>more clearly shows the needs of the linear pull load of the system >>rope hug should be extra pepper, not main dependancy! . Specifically here of course as anchor for all the brake forces shown above to be applied against >>but applies to all such geometries of pull, in flexible and rigid devices. . Pile Hitch is great study of 2 well known base knot forms combined and interwoven where each lowers the loading to the other!
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    06-18-2019
    Thoughts. . Between first flex of hinge and when it is fully committed to fall on own is what i refer to as 'first folding'. >>twilight between stand & fall, during which can temp spoof more support need, to get response of stronger and more persistent birthed hinge. Just as teen temp lifts weights to exercise to more persistent strength in larger man. >>then extra load or weakness is resolved when tree becomes committed (lifts off of wedge etc.) So is stronger AND pulses back as 'lighter' in system vs. comparison of regular strength/thickness and faux starting load. >>The lighter load effect can impact pulse back thru system against load as a support, muting some of leverage increase as tree lunges forward. . The geometry shows the potential of the system (like a motor's limit), the species/condition limits what can be done within that potential before tree as force conductor is overwhelmed >>Like same motor potential, connected with lighter gauge wire, can't reach the machine potential because force conducting device overwhelmed when raise amperage to motor. Potential range is the same, just lesser wire/tree could not handle conducting produced forces. >>knowing geometric (motor architecture) potential and what system 'gauge' can deliver within that potential can tell what can be done. . BUT in this 'birthing period' of hinge strength, we can also go the wrong direction and baby hinge 'weaker' instead of stronger by playing differently at same point in timeline. Just as temp faux load increase of leveraged load can pulse support back against load when faux relieved >>i think rope pull/wedge push not totally forward but 30% effort used as TEMP ballast against side lean, can then allow the side lean to pulse back when faux rope/wedge relieved. Seems better to use all 100% added faux rope or wedge loading to target direction is best to get stronger hinge(if wood can handle thicker flex), with full time not temp ballast built in (tapered hinge) and only pulse back is for support not against efforts. . Also, i think porting more force thru tapered hinge leverage machine gives that as another multiplier of force used (wedge or rope) that you don't get if directly confront sidelean (giving more nominal effect, not going thru tapered hinge multiplier) and direct pull/push less persistent/is temporary(compared to embedding side load ballast into tapered hinge), nominal fix that skips around leveraged tapered hinge that is more persistent until tearoff. . We talk of making a tapered hinge, but actually we are just leaving what is already there keeping tree from going where we don't want it to go. This to me is about cutting less active parts, keeping and fortifying the strong until folding w/o overwhelming tree container to split, seize, barberchair etc. in art of production and safety. .
    41 replies | 1973 view(s)
  • theTreeSpyder's Avatar
    06-17-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Important note, the eye can be fooled. A single Turn and Half Hitch has only 1 radian Pi power arc of Nip and Brake forces and Round Turn has 3 such power arcs. On the graph above jumping backwards on the exponential growth rate shows single Turn left way behind; not in the running... This carries into all kinds of systems and knots. . . i think a base knot of 1 Turn just hangs on, But Round Turn(RT) different class if performed on the mount (also Crossed Turn base of Clove is Round Turn with more enforced friction) or on the Standing Part is great increase in knot forces. >>But not RT or Crossed Turn on host mount, followed by RT on Standing Part because the RT (or Crossing RT) on host consumes the 'power' needed to get strength return from RT on Standing. . The 3+ half circles this way, or upgrading Square Knot to Surgeon's (as linear 3 half circles are close to more perfect knot of long eye splice) i think is an extension of the above 3 half circle arc on bollard theory above; only 3 arcs now alternating/opposing/self balance used to apply to linear pull as some key to knot workings. . i think these things here are key to all knots and all other rope friction systems as well.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    06-16-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Finally found lost link remembered for what i think is very key vision into brakeForce mechanics on bollard type simple pipes like Porty. But would then extend to cranking capstan, why to always keep at least 2 turns on drum of winch (so no raw force possible to termination) and even inside the secret life of knots.. . Technical Paper: The Mechanics of Friction in Rope Rescue presented to International Technical Rescue Symposium 1999 by Stephen W. Attaway:GA.Tech Masters Structural Engineering + Computational Mechanics (modeling stresses, displacements) Ph.D. . i believe this fully explains what we 'feel' in working with Porty AND turns of Friction Hitch, any Round Turn + etc. >>very powerful strategies, that math/geometry offers explanation for. >>including, how simple, slick, small Porty is such a POWERFUL friction device etc...
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    06-11-2019
    . i think it is most accurate to say that the geometry/ layout schematic gives the potentials of the mechanix. . The species and condition limits the amount of stresses that can be held and still perform w/o overload. >>just as plastic or metal would give same geometry potential forces, but limit to different power bands within the potential. . Tapered hinge or thick huge may work here not there do to species/condition, but never to exceed the potential limits of the geometry.
    41 replies | 1973 view(s)
  • theTreeSpyder's Avatar
    06-11-2019
    Many tricks don't work best in all wood species/states like cheap/fast growing/thus weaker in trade/punky/weed species or otherwise compromised woods that overload before loading all of helpful force trying to get. . In Murphy's original vid, i see a faux weakness of extra cut that closes, and then a close of a Step Dutchman. Any close changes pivot point, taking leverage from load side and giving more to support side>>effect depends some on rotation position of spar >>1st close is across flex angle of fiber for now firmer flex (started with less resistance) >>2nd Dutchman close as dead push up fiber column and a more severe, uncompromising change and sudden pulse in leveraged support increase (but is to one side, so offers other open side of face as path of least resistance, and pivotal change in leverages especially early in fall. . >>LET'S MAKE MORE/THICKER! . To theory of all hinges for same load support from same pivot line force the same strength hinge resistance to folding forward . . To theory of spoofing faux support need by temporarily spoofing higher load:support ratio, to then quickly amend back to normal after more hinge strength forced >>Yin-Yang do this by spoofing load or the equal/opposite: weakness to fake extra support need to get thicker hinge . . Working on drawing of :Any close changes leverages, full face dutchman vs. step dutchman. Close across fiber for re-flexxing hinge or close down fiber column for push back of Dutchman force.
    41 replies | 1973 view(s)
  • theTreeSpyder's Avatar
    06-03-2019
    Nice slow mo'! . i think at 'first folding' movement (that can cleanly continue on own) sets potential hinge strength. >>you can let it ride it out or lessen hinge (parts) with saw, sometimes getting 'too happy' with saw. . In usual fall/not back leaner , tree moves to a more leveraged position w/inertia also; into pre-set hinge/face support to close/tearoff nearer to horizontal.. . ANY loaded close is change in raw mechanix of load/pivot/hold positions, angles and distances between the 3 points. . BUT, any purposeful close near vertical, can give artificial relief before the close, to force thicker hinge of same load with less support from front pushing back.. >>Tree moves to next position>>engages more support from front/close near vertical, lower speed of not throwing thru close/step etc. . This gives the relief at first folding, then closes, like some Dutchman etc. changes pivot, support, angle, length to tension support IMMEDIATELY like pulse back thru machinery against impending loading. >>If make normal face, and bypass the lower cut to come horizontally across fiber can get close/push from inline to fiber column. >>But if double kerf down at back of hinge , can leave space of less support at start, to try to force more fibers in hinge>>then gap closes for more bolstering back as leveraged load increases instead of increasing load leverage and not support from point of 'first folding' of hinge strength setting per load being same in same situation, no matter what is coming next. . Can draw later but to this imagery of behind the scenes/bark whereby close down strength of fiber column support pillars/stop command can be deadly at near vert.; but close across the fiber is just a type of bolstered flex we are doing at that angle across fiber anyway, just changing it some in the 'program' written into 'machinery code' before turning it on (empowering/enabling by removing some support):
    41 replies | 1973 view(s)
  • theTreeSpyder's Avatar
    05-27-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    i did work to expand this body knowledge sense, and would often say aloud or just to self, well if the rope was pulling on me like that; at that balance point,it would feel like this, kill me like that etc.... . Came time to roll huge meat logs, would look at side and see pivot on ground, like hands on highbar to 1 point in center, half the weight going forwards, half backwards so is balanced to not moving. Just psyche into breaking that still inertia and keep moving. Many times standing on side of log towards target and grabbing other side of log and pushing down with leg for bodyweight + 2x leg effort kick start... Of curse stay on side of log, and jump off at rite time and guys keep going, so not OSHA approved.. Anyway, gymnastics totally changed by approach to many things. . When trying to understand something i try with minimal variables such as parts. Also, find single switches between can and can't that make all the difference to distill out and trace into other things. Like experiment try to vary 1 element input and see what consistently varies on the output side of the pipe. Square Knot Family to study have been this for me. The simplest, frailest slips, that must be set right to function, lend views into that world. . . What Knot is kinda a slick trick, can show as secure, flip the switch, hand to target kid/wife etc., and knot walks out when they try..
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    05-27-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Wish I had later pix, or even just more, like I wish for tree werk. . Learned to listen to and tune force thru bod to orchestrate different effects. SUPREME CONCENTRATION in own space, almost meditational yoga movements. Internally naming conducted forces in own nomenclature to organize, call out and command these things. Later extending same to outside self. . This guy is real deal tho, never even saw this level live: <iframe width="854" height="480" src="//www.youtube.com/embed/H_QHuJyYI0g" frameborder="0" allowfullscreen></iframe> Very typical chalked hands start to keep dry to slide. Lifted up extra high for rotation seating and drop straight down sharp to seat hands and pull surely straight. Straight bod, rigid, even toes pointed to get full points, hard to concentrate on all, but in end helps leverage swing movements. The draw to cross is Butterfly as opening move statement. Iron Cross with Planche(horizontal bod hold) is sever frontal bod strength. Can see trying to shorten arm levers, not hyper extend like for swing moves. They'd ding some points off at end some for that landing step in vid! Very tough task masters! i think you can almost see he knows step cost him,but must maintain confident, prideful stature to not worsen point faults.
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    05-26-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Many failures seen, or excessive loading wears placed by simply not grooming the geometry smooth. My hard knocks lessons make me shudder some, as relate to the excess loading strains etc. i wasn't all with the 'simple complexities' of geometry any more than most in high school i guess. . My most vivid work geometry lessons came from working out after school, working at father's hardware store and on farms in summer too. Then later to geometry forces felt learning to drive, and watched for on tractor etc. . . Iron Cross gives lots of strain at shoulder etc. but no support against right angle load as any other shituation. Iron Cross support is pure lats, as those muscles are at better angle of support to load! Should have some generous teepee in our rigs,but none in Iron Cross! Looking at some load angles, brings me rite back to Iron Cross, can even say ouch in pain.... . Iron Cross is held for the longest 3 seconds of your life to get credit; but is only a 'B' move, to get top 'C' points; had to hold in combination with legs perfectly straight in front in Lseat,for an even longer 3! (But somehow l-earned to automate Iron Cross and focus on Lseat, at some point pitting their pains against each other, rather than cumulatively against me, at least that is what told self to help psyche thru as internal coach!)
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    05-26-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    05-25-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    139 replies | 15753 view(s)
  • theTreeSpyder's Avatar
    05-18-2019
    theTreeSpyder replied to a thread Rope in Gear Forum
    Round Turn and 2 Halves are a base reference point; almost an Anchor Hitch + Half. >>If line was very stiff/hard to work, especially older times; Round Turn and 2 Halves was called an Anchor Hitch and used so. (Actually the said Bend to Rail and Anchor, sometimes ring, but most names changed to more normal only line extension is a Bend mostly now) . A Round Turn, is a totally different animal to me than a Turn. A Round Turn is a real workhorse, a Turn is a frictionalized slip in knot usage. . Better Half Hitch and Timber Hitch forms and usages: . The Timber Hitches list almost immediately in ABoK "CHAPTER 21: HITCHES TO SPAR AND RAIL (RIGHT-ANGLE PULL)", only preceded there by 3 Half Hitch base forms. The context begins with typical Half Hitch#1662 as worst security/nip warnings warning with Skull/Crossbones, but a base structure to build on. Then shows the most security at top nip/opposing the linear load pull position as a safer Half Hitch form#1663 awarding Anchor icon if constant pull. Then introduces Timber Hitch #1665 concept from extension of worst nip Half Hitch tail#1662 . #1666 then shows Fig.8 concept as upgrade to Half Hitch#1662 and shows the nip position pushed to half way between normal and top nip Half Hitch. Also adds a geometric consideration of:"particularly if the encompassed object is small." of even higher nip. #1668 then shows the Fig.8 Timber Hitch with nip more to side and not bottom as improvement. Next trick is in #1669 Fig.8 Hitch with Round Turn. Where the Round Turn is around the Standing Part and Fig.8 portion actually pictured as fig.8 Timber Hitch and so adds that the "Round Tum on the Standing Part adds materially to the strength of the knot.">>i try to use this principle in may things, knudeNoggin adds that if Have a Round Turn on host before Round Turn on Standing Part, you don't get the strength increase. i say that is because of drop in rope tension can't feed force to the Standing Part to produce the affect. Next chapter is "CHAPTER 22: HITCHES TO MASTS, RIGGING, AND CABLE (LENGTHWISE PULL) To withstand a lengthwise pull without slipping is about the most that can be asked of a hitch. Great care must be exercised in tying the following series of knots, and the impossible must not be expected" that starts off with a Timber Hitch preceded by 'lengthwise' Half Hitch form to convert Timber from "RIGHT-ANGLE PULL" to "LENGTHWISE PULL" usage in the back to back chapters.
    139 replies | 15753 view(s)
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  1. Kenny,
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    I AM coming south to hlton Head SC with a stump grinder or two and a skid steer loader.
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