Perverting the "L Delay":

Ideas and instructions how you can make your own bondage toys.
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

Oh the grief of typos!

A lab coat..... hmmmmmm......

Look me deep in the eyes, and join me in the lab.
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~ Leatherworking, blacksmithing , woodworking and programming are the most pervertable skills you can learn! ~
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

Experimental data in a spreadsheet:
Experimental data.jpg
IMHO that looks very nice!
Looking at the 500g points, the effect of temperature and wire length are clearly seen.

And looking at the weight series (blue diamonds), there is a nice linearity.



I have started a 550g experiment, and hopefully it ends up right where it should.
(somewhere between 150 and 200 minutes)
~ Leatherworking, blacksmithing , woodworking and programming are the most pervertable skills you can learn! ~
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bound_jenny
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Re: Perverting the "L Delay":

Post by bound_jenny »

That graph is really good! I was expecting consistent data but this is really consistent.

And you gotta love Gonzo's tie. 8)

You're a scientist and a pervert. :love:

Jenny.
Helplessness is a doorway to the innermost reaches of the soul.
If my corset isn't tight, it just isn't right!
Kink is the spice of life!
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

And it gets even better!

550g gave 164 minutes!
Experimental data 2.jpg
Nana.gif
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I think I'll make a "How-to write up" without all the small talk one of these days.


Edit: 400g gave 539 minutes. No need to try less for now
~ Leatherworking, blacksmithing , woodworking and programming are the most pervertable skills you can learn! ~
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bound_jenny
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Re: Perverting the "L Delay":

Post by bound_jenny »

You have to put a banana suit on to do a victory dance? :shock:
Sir Cumference wrote:without all the small talk
Small talk? :? ... Ooooooo.... wait until I peel that banana suit off you... :whip:

But at least your data isn't slippery. :rofl:

Jenny.
Helplessness is a doorway to the innermost reaches of the soul.
If my corset isn't tight, it just isn't right!
Kink is the spice of life!
Come to the Dark Side - we have cookies!
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Sir Cumference
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Re: Perverting the "L Delay":

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Write-up: How to make your own "Perverted L Delay"

(Illustrations are on their way from The Cumference Graphical Department)

You will need:
- Electronics solder, 0,7 or 1mm diameter (must be the tin-lead type, not the modern lead-free solder!)
- An adjustable weight (a small sandbag or a plastic soft drink bottle is fine)
- Some small rings (Miniature key rings or links from a thin chain are fine. Or make some from copper wire)
- Hot glue gun
- String
- A pillow for the weight to land on
- some kitchen scales
- some kind of time keeping device

1: Make a bunch of "Delay elements"
- Cut 5cm pieces of solder
- Bend each end in a hook
- Place a ring in each hook, and secure it with a blob of hot melt glue (work on baking paper, the glue won't stick to it)
Work as consistently as possible, the more alike your elements are, the better the timing will be!

2: Prepare the weight

- Pour water in the bottle to a total weight of 600g (maybe 7-800g for 1mm solder)
- Write down the exact weight
- Tie a string around the neck of the bottle (from here on called the weight)

3: The experimental set-up
- You need something like a nail in the edge of a shelf or table, or a hook at the underside of something.
(The delay element must hang from the hook, and the weight must hang freely under it)
- Place the pillow below, to catch the weight.
- Tie the weight's string to one end of a delay element

4: Perform the first experiment
- Hook the other ring on the delay element over the nail
- Sloooooowly let go of the bottle (do not stress the delay element!)
- Start the timer/ note the time
- Make your best evil genius laughter
- Wait for the weight to fall......................................................................................................................

5: BUMP!
- Note the time next to the weight

How long did it take? Hopefully somewhere between 30 minutes and a couple of hours.

6: Redo the experiment, but add or subtract 100g each time.

7: Plot your results!
You now have a calibration curve, that will tell you what delay to expect at a given weight.
In all the experiments I've made, it has never failed to drop the weight, but you must remember to test your exact set-up before use.
Calibration curve.jpg
Timing will be affected by:
- Temperature (low t, longer time)
- Length of solder (shorter length, longer time)
- Knots, kinks and damage to the solder (shorter time)
- Attachment of the solder ("stress" from knots and bends will shorten time)
- Consistency! (sloppy workmanship leads to uncertain delays :whip: )
- Alloy and diameter will (in theory) have a big effect, but you cancel that, by using a commercially produced solder. It can be expected to be very uniform.





Making data collection easier?
Use an automatic timer. A motion activated webcam that takes data stamped photos, an Arduino and a micro switch or an old fashioned electrical clock, that has it's battery ripped out by the falling weight.

Other ways to attach the solder?
Lots, but in my experiments, the "ring and glue" gave the best results.
Other possibilities could be:
- A knot on the solder, resting in a slit (my first solution)
- A bend on the solder, and strings tied onto it with a sheet bend
- A loop of solder (but this gives you twice the strength)
~ Leatherworking, blacksmithing , woodworking and programming are the most pervertable skills you can learn! ~
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

1879 minutes to break a loop.
Weight vas 500g and temperature 17 C.
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BornThisWay
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Re: Perverting the "L Delay":

Post by BornThisWay »

I like your delay.
I was wondering if your loop method time increase could be explained as if it were acting like a pulley?
In other words, if you doubled the weight to 1000g would it break in the same time as a 500g attached to a single line?
Last edited by BornThisWay on 10 Oct 2016, 03:03, edited 2 times in total.
davisev5225
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Re: Perverting the "L Delay":

Post by davisev5225 »

Hmm. I've got solder lying around from fixing up various electronics around the house. I just might give this a try... :)
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

BornThisWay wrote:I like your delay.
I was wondering if your loop method time increase could be explained as if it were acting like a pulley?
In other words, if you doubled the weight to 1000g would it break in the same time as a 500g attached to a single line?
I think it would.
(but I have not tested it)
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Re: Perverting the "L Delay":

Post by BornThisWay »

This release is amazing!
I started off trying to hang a weight from a single strand and I watched the solder stretch and then break in about 3 seconds.
So then I looped it once, initially the solder was about 7 and 7/8 inches, 10 minutes later it was 8 inches.
an additional 10 minutes it reached 8 and 1/4 inches.
watching it slowly stretch to the point it will eventually break.
I'm using a light duty rosin-core soldier that contains lead.
my weight is from an old German clock.
I think "Lead" is the key to it working, although I have not tried it with a lead free soldier.
Da L Delay.jpg
Edit:
it took about 45 minutes to fall, very cool, had to see it for myself. I agree that this is a really great alternate method to ice and Sir Cumference's data shows that it can be reasonably timed by doing a dry run.
Same safeguards should apply, always test it. I suspect too light of a weight could take days or never fall at all.

One thing I did differently was my knot... My knot is not a Knot at all.
It is simply a wrap around, but works great with solder:
not knot.jpg
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Sir Cumference
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Re: Perverting the "L Delay":

Post by Sir Cumference »

Thanks for sharing.

I'm pretty sure too, that the lead is important.
You need a material where defects in the structure can migrate at room temperature.

I prefer a variable weight for the timing. It is much more flexible than varying the thickness or number of strands.
For a more permanent setup I would use a sandbag as a weight.

A trouser leg sewn shut in one end makes a great sandbag for many purposes.
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bound_jenny
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Re: Perverting the "L Delay":

Post by bound_jenny »

Sir Cumference wrote:A trouser leg sewn shut in one end makes a great sandbag for many purposes.
That might explain why you're wearing shorts a lot... :idea:

:P :P :P

Jenny.
Helplessness is a doorway to the innermost reaches of the soul.
If my corset isn't tight, it just isn't right!
Kink is the spice of life!
Come to the Dark Side - we have cookies!
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Re: Perverting the "L Delay":

Post by sub_anal_slut »

Great discovery

love it
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Re: Perverting the "L Delay":

Post by BornThisWay »

The reason the L-Delay works is because typical Solder is made from Lead and Tin. Both of these metals have a good Ductility rating.
Meaning that they will stretch and deform under tension.
Pic 1.png
Pic 1.png (4.63 KiB) Viewed 3166 times
Schematic appearance of round metal bars after tensile testing.
(a) Brittle fracture
(b) Ductile fracture
(c) Completely ductile fracture



Example of (a) Brittle fracture – Low Ductility
Low.jpg
Low.jpg (11.07 KiB) Viewed 3166 times
Example of (b) Ductile fracture
Average.jpg
Average.jpg (12.08 KiB) Viewed 3166 times
Other metals that can potentially be used (with proper testing) in scenarios
table1.jpg

http://www.failurecriteria.com/physicalductilit.html
https://en.wikipedia.org/wiki/Ductility
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