Copperhead Igniter Question

[Thor]

Planning on firing my upscale Goblin (2.6"Dia) with an F21-4W and first time using copperhead igniters. Can you put a small amount of wadding into the nozzle to hold the igniter in place like I used to use on the Estes Black Powder engines before they developed the colored plastic plugs that do the same thing? Thanks! Thor

[ghrocketman]

Follow the instructions that came with the copperhead; I have heard of others using the wadding to retain the igniter, but if Aerotech does not recc. it, neither do I. I have seen AP motors CATO due to wadding being too tight.

[barone]

Better off taping it into place......plugging may create too much internal pressure and cause a CATO. Ran into that type of problem with some of the FSI motors.

Don
NAR 53455

[Thor]

Thanks guys! The Goblin flew today for the first time and I was suprised how long it sputtered on the pad before launching. It flew slowly but really nice and straight and seem to coast slowly without a rapid slow down, ejection was perfect. I had built this rocket last summer and just now got to fly it. It was a big thrill, my first F engine. I plan to make a 3.9" diameter Goblin this year and that one will be my first 29mm motor rocket.