Hot Tip Of The Day!!!

Jump to latest Follow Reply
Franklink said:
Probably 15 years ago somebody did some fairly scientific testing of lead pellets on glass. Can't remember now if it was the old "yellow" or the green 54 Crosman-specific forum.

What I vaguely remember from that was that it took a surprising amount of fpe from a lead pellet to break glass. Glass is a strange material, possing qualities of both a liquid and a solid.

Can't remember if it came from that or elsewhere but for some reason the concept of a bb needing much less fpe than a lead pellet to break glass stands out to me.
Click to expand...
The bb has a smaller point of contact and being steel, I can see it not needing high FPE as it won't deform.
The pellet on the other hand, has more weight and to me, that should have been enough for it to get through. Or at least crack the second pane.
Maybe because it spread out on the first pane, it also spread out the force on the second pane? Or did it flatten on the first pane?
I have a few glass panels for use on a green house.... I kinda want to try out the hypotheses and see just what happens. I don't want to spend the next couple years picking glass out of the yard, though.
 
Upvote 0
I would think that a big factor on the pellet impacting the second pane of glass would be that it would already be flattened out (and a good bit wider) from having gone "splat" on the first pane. Then add in that it will have lost much of its energy from the first impact, the second impact at a lower energy and across a wider and flatter impact area will have a harder time breaking thru. A BB will hit the second pane still fully round with a corresponding localized pressure point (albeit with lower energy).
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu