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4hv.org :: Forums :: General Science and Electronics
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Bomb Shackles and Quick Releases.

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Patrick
Thu Jul 12 2012, 11:54PM Print
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Bomb Shackles and Quick Releases.

how is it these work? ive looked up B-17's F-16's and everything in between and cant find anything useful. supporting a 500, 1000, or 2000 pound bomb at 2-4 G's is no trivial matter.

Ive seen on many mythbusters episodes a quick release used to hold and letgo of high tension, yet the pull cord seems light to activate? how is all this done?


Large
I can see here the eyelet is split and allowed to open, letting the lug or eyelet out. But if there isnt some clever trick, it would take enormous force to keep closed or trigger open. I cant find the rest of this document yet, i think its a patent art thing.
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2Spoons
Fri Jul 13 2012, 01:50AM
2Spoons Registered Member #2939 Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
Its all about leverage. The attached pic is a quick release shackle used on boats. There is a fixed line tied to the top loop, the releasable line loops into the bottom loop. The bottom loop has a pivot (lower right pin) and a catch (upper left opposite pull ring). Under tension the releasable line sits close to the pivot, so the load on the catch is only a small fraction of the tension load. Releasing the catch only requires enough force to over come friction, and a small internal spring.

I would say the quick release you are talking about operates on a similar principle.
1342144192 2939 FT141701 Stainless Steel Fixed Snap Shackle
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Ash Small
Fri Jul 13 2012, 06:19AM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Simple really, when the peg turns through 45 degrees, the spring loaded pin/plunger opens the shackle.


1342160359 3414 FT141701 Quick Release


If you require any more details, just take a screenshot, and scribble on it using paint to clarify your point.

(sorry about the quality of the diagram, it only took a couple of minutes.)

EDIT: Always reminds me of Slim Pickens (Major 'King' Kong) in the film 'Dr. Strangelove', riding the bomb.


Copy


"Ye-Haw"

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Patrick
Fri Jul 13 2012, 07:04AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
The greatest movie ever made, Peter Sellers, Slim pickens, george C. Scott, James earl jones...

masterful acting from peter sellers playing 3 characters, the US president, captain mandrake, and dr strangelove...

Peter Sellers was also supposed to play the role of major king kong, but felt 4 roles was too much, at the last minute slim pickens was chosen for the senior pilot.
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