A loaded rope is a raw piece of open power machinery w/o safety devices;
- rope can do great work and can save or take a life instantly.
. Every Action/inAction to a force loaded line/ or setup for a loading
- dictates a mechanical command to the architechture of the mechanics
- you can stack commands to invoke different forces, sometimes unintentionally!
Rope is a pulling and resisting by pulls only inline tension direction device
- in a family with: cable, chain, webbing, fishline etc./nonCompression devices
- Any of this device family is only at full usable capacity at pure inline
Rope can also be thought of as a vessel that carrys power,
- instead of electrical, water, hydralic etc. power; rope carries line tension power.
Friction Path : gradually increasing tension reduction in line
Friction free path : no tension reduction
Pure Inline: 100% efficiency/ all fibers pulled equally /full designed capacity usable
Deflection from pure inline/any curve etc.: limits available fibers that can be used
/ temporarily compromised; is said rope is 'weaker' but just can't use full line capacity
(Simple) Turn: slip with gradual line tension reduction by friction path, best nip/pinch points ~180
Round Turn :Grip, much increased friction path, nip/pinch points 360 +
Dbl.Round Turn / Coil : magnified/super magnified Round Turn properties.
Nip (Crossing) HIGHER TENSION line over lower tension line can 'nip in bud'/hold fast if leveraged enough
- if not seriously reduce lower line tension even further
Crossing Turn : LOWER TENSION line over higher tension
- leverages friction path line tension reduction even more so of both high/low tension parts
Stopper : mechanical cork in bottle stopper/end of line flow as a safety termination;
- best with secondary keeper/ failsafe
The Half-Hitch has a few forms, this it's most basic has several
places that the line's own forces can 'nip' down on the 'bitter
end' to secure. The point inline equal and opposite to the
main pull wherthe line seats/ pulls into the support/spar; not on the load
side where some parts of the line are neutral, even
pulling away! Any slipped form, travel over/instead of
under, coils etc. should always be plotted as spacers to the
best/most secure nip point/range where line tension across top
shows as RED, not on load /low side where rope is shows as lower
tension purple to blue. The YELLOW shows the bitter
end to be cautious with to proper nip point. Shown here, only
the half-n-half gets a GREEN, for further stopper/in
after the BEST/HIGH NIP!
Clove family above shows a basic lacing and how just 1 changes
the mechanics and name of the same basic form! The Clove
as pictured has only the host spar as a deformity, it doesn't
bend it's own standing part/to the load like the previous
Half-Hitches do. The constrictor is the most secure of the
4, with it's bitter RED line buried under the Crossing Turn and
the Standing Tension, it can be hard to remove. The Bag is
my fave, more likely to maintain an opposite/top nip when used
as a hitch, easier to tie and untie, and arguably about as
secure. The groundline isn't quite as good, i only would
use it on the end of a horizontal line run; because then it
hangs down properly/dresses nicely, but even then not for major
loading as is subject to jamming. The Clove and
Constrictor are the same mechanic pulled form either end, the
bag is a different/secure hitch; but of different mechanics, the
groundline shouldn't be loaded backwards.
Our Greatest benefactor, Mr. Clifford Ashley treated hitches in
2 different chapters 21 and 22/ back to back categorized by a
standard perpendicular on spar where the inline function of the
line locks across the spar/inline to the rope itself properly,
otherwise the latter chapter shows ALL hitches preceded with
some type of half hitch or marl to modify a lacing pulls inline
with the spar.
#A and #B pull across the spar perpendicular, placing the most
intense equal/opposite directly inline, locking into the
opposite side of the spar forming the best/top nip point inline.
#C shows the pull along the spar , the line skews trying to
compensate and is leveraged, the lock on the opposite side of
the spar is not directly inline with the load.
#D shows a (killick hitch) Half Hitch preceding Timber ; now the
pull side of the half hitch is inline with the resistance of the
half hitch as it leads to Timber hitch part.
-Timber Hitch is still pulled sideways, but the half hitch has
now taken most of the loading, so the Timber part of the
mechanic is not leveraged per the actual loading pull on t he
eye of the line, Timber is only leveraged in perspective to the
buffered loading coming out of the half hitch!
youtube seals basic knot tying requirements while holding
breath underwater, should seem easier on land now..
overhead pulley install from ground
Playing with forces to minimize loading while maximizing power
"Friction Saver" (minimal rope friction burns on tree)
Pulleys can extend and empower rope machinery
-the same alterations we see in forces happen on any matching rope bend,
just at usually higher frictions.
-i think we can learn more about knots by looking at rigging as the same
rope device under same forces and principles, just a larger scale model
of forces inside a knot!
The pulley bearings are the frictional part/ inefficiency.
A bushing on pivot can take more abuse, but has more friction; to get
another 10% efficiency or so in more delicate bearings can cost 3x as
Another way for more efficiency is a larger sheave as lever over the
frictions on pivot
-the sheave is also important (sometimes critical in saome materials and
cables) as to how well it supports the 'belly' of the loaded line.
Larger sheaves also preserve rope 'strength' by less dramatic bend/more
In the same sheave, a thicker rope can also give some more efficiency,
plotting the outside tensed fibers as the actual leverage point from
1st class lever : input effort and output workforce move in opposite
directions; for the pivot is between them.
-this can give more power or speed, or even same, depending on
input/output distance ratios from pivot; the real trick is the unique
reverse of direction
2nd class lever: input effort and output workforce move in same
direction (pivot is not between them) and the input effort is FARTHEST
from the pivot
-this concentrates the power on the outer arc of iput into the
smaller/less distance arc for more power(SLOWER output than input)
3rd class lever: input effort and output workforce move in same
direction (pivot is not between them) and the input effort is CLOSEST to
-this dilutes the input effort on the inner input arc into the larger
arc, for less power, but over more distance(FASTER output than input)
A pulley itself is a 1st class lever for the simple fact that the
ropegoes in 1 direction, comes around and out the opposite.
-There is no leverage gain/loss (only frictional loss) in a lone pulley
as both input and output are the same distance from the central pivot.
But, a pulley used on load etc. can give a 1st, 2nd or 3rd class lever
by simply if it is on the stationary pivot, moving input or moving
-Thus the pulley can reverse direction or increase power/lose
speed(distance in same time of movement); orlose power/increase
speed(distance in same time of movement)
no free rides can trade power for distance of work effort input, and
then their is an friction inEfficiency 'tax' with every
5ft. of 100# input effort can give 2ft. of 250# of load lift(slower) or
10ft. of 50# load lift(faster)
-always limited by /equal to the 500ft.#'s of 5ft. of 100# effort
input.(ignoring frictions/inefficiency loss tax)
-actually similair to having bucket of paint 1 coat 40 boxes, or 2 coats
20boxes, or 4 coats on 10 boxes; always the same factor, paint goes
farther or 'deeper'/stronger; no
-5 gallons of water can be stretched out in more quart containers or
less 1 gallon containers(less any tax/inefficeincies of spillage, water
stuck to side etc.)
magic after peeking behind the curtain; just common day sense they found
(sic. Wizard of Oz)
1st class lever trick / closing machine to self and conserving more
forces to target; thru unique reverse direction prop. of 1st class lever
BY CAPTURING THE EQUAL AND OPPOSITE FORCE OF EFFORT AND MAKING IT TOO
WORK ON THE LOAD!
2 parts: bodyweight and effort, can impact both, at same time or use 1
force to steady while lining up other force to engage
(bodyweight + effort + equal and opposite of effort ) X as much impact
as you can muster , all in concert, demading legforce be your input
effort, can be quite powerful game changer: lever, 4way , pulley,
climber lift, 3/1, 5/1, 15/1
not rotaional levearge like arc on stiff bar, but increase of number of
pulls on load by pulleys actually on load itself
-stiff lever system or flexible lever system(pulleys) can be used to
examine pulley forces to know outside of limits on rope forces in knots/
jsut with more friction than pulley but same math of bend in line
pulley / flexible levers etc. also like a transmission:
1st class lever: Reverse
2nd class lever: Low Speed /hi power to start
3rd class lever: Hi speed / lower power to keep rolling
bikes, hydralic jack
Tree Care Errs:
Disrupting remaining tissue on a cut or leaving too much/
If must remove branching, releive weight off it first with a
primary removal cut, then make finishing cut of a small piece to
knot stretch the fibers into the wound/leaving disruption, more
attackable surface area, more draining on tree to handle etc.
DON"T cut into the parent swell at joint or takes MUCH longer to
seal, inviting more problems etc.!!!!
Tree Care Errs:
Mulch aginst trunk or too deep suffocates.
Tree Care Errs:
Mulch should be 1 foot from trunk NOT against trunk.
Slide shows root tissue very different than trunk; tunk tissue
like upper plant.
Mulch should not be so heavy in total weight as to smother the
ground, nor so deep that air/gasses can't exchange.
Mulch should not be more than 5" deep, 2" if soil real 'tight'
/already air problem
i guess you'd have to be a climber; to know well the weightless feel of
rising/floating into a grand tree canopy, in such light ballet as these
but i hope anyone can see the wonder of same afforded to those who can't
even walk. Which i could have been there to help.
This might not be easy to watch, put you probably don't want to miss it!
Define group: Inline only, tension only loading devices: rope, webbing,
chain, cable, fishing line etc.
Differentiate from solid wood/metal/stone etc. devices that support
inline and across their main axis-es, and in the compression and tension
Example: A wooden beam can support a table from underneath, or from
above; even at an angle. A single line can only support from
above, and only directly inline/under the support
Paradigm: Because these devices only resist in on the inline plane in the
You can do great work, morph the device w/o tools, over distance and yet
be folded away into a bag like it was nothing.
BUT, in trade, ANY deformity from it's perfect, natural inline state;
takes some of the fibers out of inline, and only inline fibers can give
-whereby the line now has less capacity; as less pure inline fibers are
allowed to work.
site expresses principles in most popular rope context, but same
mechanics dictate the properties of the whole family of devices (rope,
webbing, chain, cable, fishing line etc.)
-with variances per their constructions and stiffnesses (the stiffer,
the more resistance to bend/ so more leverageable)
pulley inline multipliers, rope machines
swig leveraged multipliers
perpendicular spar pulls, leading half hitch/marl(s) to convert to
inline loading pulls
inline pulls typically leading half/marl(s) and then anchor, goes into
friction hitches throat are built same for inline rope loading to a line
rope leverage vs. spar leverage
Now / Then
Around 2000 i started to realize i was collecting and even losing some of a lot of links, and
information mostly inspired by ISA tree climbing BBS that in
someways morphed into TreeBuzz.com.
i put together several free websites before buying some cheap space; and
maintained the site in place after was to old for tree work and keep
site open; using only for
experimenting for work, wedding, funeral etc.
i've always wanted to show the 'knot' and riggings for them as
categorized by their mechanical forces that they invoke; and some how
started drawing knots again at start of 2016; looking to dedicate some
space to them under separate domain name.
In respects to the history of the wooden spar and boat heritage of most
knot lacings, as well as my own tree work background will maintain a
woodsy theme even if evolves to a more full blown knot site. To
stand for the heritage as well as keep the grit of real hard work done
with these working class knots; and lessons learned that way!