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Old 11-30-2015, 04:35 PM   #11
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Re: Nylon bolt strength

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It depends on the design of the plane.
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Old 11-30-2015, 10:46 PM   #12
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Re: Nylon bolt strength

Four is way overkill for strength. You could just about hang your truck on that many!

My 63" span Seniorita has 2 dowels on the front and a SINGLE 10/24 nylon bolt on the rear. Out of 4 wind strikes so far 2 have sheared the bolt and 2 have broken the wing with the bolt staying in tact.

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Old 11-30-2015, 11:00 PM   #13
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Re: Nylon bolt strength

Yup. The structure around the bolt will give way to protect the bolt.
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Old 12-01-2015, 06:21 PM   #14
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Re: Nylon bolt strength

This subject came up a while back and Micheal O from Newmarket had some awesome information;

"The problem typically with the "breakaway" nylon anchoring bolts is that we vastly underestimate the shearing strength of different sizes of nylon bolts ... from an old ACE R/C catalog: 1/4x20: 247lbs, 10/32:155lbs, 8/32:108lbs and 48lbs for 4/40 for one nylon bolt..... I'm not sure of my physics anymore, but a 10 lb plane in a nasty landing at several times normal earth gravity is probably subjected to well under a 100 lbs total shock.

Music wire would certainly have the rearward shock absorbing capability.

Another version on the nylon bolts that wouldn't look bad on a non-scale model is attaching the aluminum gear with elastic bands wrapped around two dowels placed thru the fuselage sides in front and behind the gear, with a couple of registering/aligning stubs of 3/16" dowelling replacing a couple of the bolts used in the conventional attachment method."

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Old 12-02-2015, 03:34 AM   #15
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Re: Nylon bolt strength

Originally Posted by OLD PRAIRIE RED NECK View Post
Four is way overkill for strength. You could just about hang your truck on that many!
Originally Posted by bbbair View Post
... from an old ACE R/C catalog: 1/4x20: 247lbs,

Dang Merv. You were pretty close. 4 Nylon bolts can hold up a car weighing as much as 988lb!!! Way overkill if mounted on a model. I too prefer the 2 bolts in back/2 Dowels in front wing mounting method.
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