flying_silverad
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Is it practical to build smaller airframes (BT20-BT70) with piston ejection? Has anyone had any luck with it?
Originally posted by Micromister
permanent teflon ball wadding. These easy to make wadding balls stay with the model. for Bt-20, 50 and 60 size models I use 15 to 30 - 12" strips of 1/2" or 3/4" plumbers teflon theard sealing tape. layed in a circular pattern over a 12" piece of 70lb kevlar line. after all the strips are layed out, tie the kevlar in a square knot. baby powder the heck out of both sides of the tape on a cookie sheet or something. pick the ball up, shake out the baby powder. attach the ball or balls to the models shock cord just outside the body tube. to prep for flight. shake the ball out a little the stuff into the body, followed by the shock cord, chute and nosecone. I'm using this system in my Super Vega with a custom nylon 24" chute, as well as several other smaller models like the Hurcules 2 stage sustainer, and Warp-II sustainer.
For BT-80 models I've used 3 of these 30 piece balls tied together at the same point on the shock line. Worked just fine.
Originally posted by teflonrocketry1
I wonder where he got that idea?
Bruce S. Levison, NAR #69055, A.K.A. Teflon Rocketry
Besides Teflon ball wadding, I have also made streamers and parachutes from this material which holds up to the ejection charge!
Originally posted by bfraley
Here's a thought on pistons.
https://www.deltavrocketry.com/piston.htm
It's written about an HPR recovery system but the installation orientation is applicable to smaller rockets as well...
Originally posted by flying_silverad
Is it practical to build smaller airframes (BT20-BT70) with piston ejection? Has anyone had any luck with it?
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