Slow motion polymer frame flexing

[montana]

http://www.thefirearmblog.com/blog/2014/...e-flexing/

This isn't Grendel related but I was amazed how much the Glock frame flexes when fired. I wouldn't think the polymer frame would last as long as it does after watching this video

[bwaites]

http://www.thefirearmblog.com/blog/2014/...e-flexing/

This isn't Grendel related but I was amazed how much the Glock frame flexes when fired. I wouldn't think the polymer frame would last as long as it does after watching this video

Which just confirms how good the polymer strength really is! That's impressive.

Slow Mo vid is amazing. Somewhere online there are Slow Mo's of the AR, AK and many others. I've always been amazed at the barrel flex on AK's.

[REB]

I worked at a military testing facility for many years and we used a lot of high speed film. In the later years some of it was digital as you see now but a lot of it was good old standard film ran at high speed with a lot of illumination . It is amazing at how much you would think is a solid piece of steel flexes and vibrates under stress.

[Sputnik]

Two of the three lowers I have are New Frontier polymer lowers. I have absolutely no complaints about their performance. They are tough, light weight, with a great trigger assembly for an economical price. What, about 100 bucks at Joe Bob's for a complete lower with stock! I would submit that it would be great for hunting. Not sure how it would be for extreme cold conditions.

[dmsims21]

I wonder if the rest contributes to the frame flex. Maybe the frame doesn't flex as much when held in the hand.

[LRRPF52]

http://www.youtube.com/watch?v=s5pVya7eask

Schmidt & Bender flexing, along with the mount. Steel, aluminum, polymer, wood, and other things we think are solids are not really, unless we have a fundamental definition of what "solid" really means. The electrons, and thereby molecules of a "solid" structure are only moving slower than the atmosphere around them. Because of resonant frequencies, they exhibit different light reflectivity, and appear as an "object" to our mortal eyes in the visible electromagnetic spectrum.

When subjected to shock forces, their elasticity becomes apparent. Polymer also relies on about a 4% water content for strength.

Elastic materials beahvior is why we want free floated barrels, balanced loads on our fasteners when dealing with scope bases, rings, and full contact of the scope rings to the tube, let alone square receiver faces, optimal torque values on barrel nuts, and tubular design rifles.

Temperature shifts throw this all out of whack if there is weakness in the system somewhere. Here's an excellent link on the subject: http://www.varmintal.com/amode.htm

[LRRPF52]

Another good video with discussions of standing wave theory:

http://www.youtube.com/watch?v=h407yVskVeM

[Rootshot]

I'm curious how much the strength of the "grip" in the Ransom Rest impacts the flex. I would assume that a human arm / wrist would absorb more of the recoil impulse and that in practice the flex would be less.

[mongoosesnipe]

On an unrelated not my glock doesn't flex like that....