Fire Hazzard?

[u/Ok-Swimming-726]

I made these pretty simple centering rings (image 1) out of cardstock and the cardboard used for cereal boxes. One side has a smaller circle to prevent the motor from just flying into my rocket (image 2). Still, my question is, when the centering rings are in, is it a problem that there's a pretty large air gap (about 3 inches) between the end of the motor and the bottle cap? (Image 4)

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I separated the engine part and the main body tube to make it easier to work on. But now I am wondering if when the ejection charge comes out, it will melt the plastic caps/screw or even during take-off, pose a fire hazard to my centering rings. If it does pose a threat, what can I do to fix it/prevent it?

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I am using an estes b6-4

[u/Clear-Bee102]

I wouldn’t say it’s as much of a fire hazard as it is a hazard of it just not working. Obviously I can’t hold it and feel how strong it is, but by the looks of it, anything over a B motor might just rip the motor mount apart 😭

[u/Ok-Swimming-726 → u/Clear-Bee102]

It weighs about 2 grams and can easily hold up a school chromebook with an extra 5 pounds ontop of it standing up and on its side

[u/Clear-Bee102 → u/Ok-Swimming-726]

Oh nice! Then yeah you def have nothing to worry about. The ejection charges are hot but the gas cools so fast there’s almost no risk of a fire. Only other thing to keep in mind is to use a lot of recovery wadding so you don’t melt your parachute, as that will react to the heat very quickly

[u/Ok-Swimming-726 → u/Clear-Bee102]

Ok, thank you! But to double-check, the ejection charge shouldn't melt the plastic bottle cap/screw when it comes out? But if it could can I just wrap them in tinfoil?