spiking plastic shells?

[starxplor]

Found this image and it got me wondering if there is a reason to spike a plastic shell? if the seam has a leak, spiking won't help, could it be for larger shells with heavier lift charges to avoid the round shape being squished on launch?

 

http://pyrobin.com/files/image_30.jpg

[Mumbles]

I suspect it's more for reinforcement on the break. I'm not sure how much good it will do. Given the odd manner in which it's fused, which is reminiscent of quickmatch, I'd wonder if it's designed for a rocket heading. You'd have to paste it or fire-proof it to be fired from a mortar as is. Plastic shells do not really lend themselves to conventional bursting methods. They're better suited for flash bags. Using more traditional methods like pasting and/or spiking can help provide reinforcement and give better results with more traditional bursting methods.

[pyro5ive]

I think most people use fiber reinforced tape for plastic shell casings.

[Bigmark]

I just used the fiber reinforced tape as well on 2" plastic canister shell's work very good.

[drtoivowillmann]

Friends:

 

If plastics are of good quality (for example: Gamón from Spain) this is totally unnecessary.

If your plastics are not good enough, change your provider to a provider with better quality.

But do'nt do that.

I manufactured shells up to 10" (250 mm) without those strings. I chosef from Gamon models with double pair of hemispheres.

Works perfectly, giving perfect round bursts in the sky. Never used strings.

 

If shells break within your mortar, during launch, string will not help. Or the time fuse is not properly glued in and lift pressure forces it inside of your shell, causing instantaneous explosion within or the equator (where the two hemispheres are joined) is not properly glued so that fire from the lift can enter and the shell breaks or at the muzzle of your mortar or at height of about 70 feet (20 m).

 

Yours truly: Toivo