A local hobby shop by me has all their c6-7 engine packs on clearance for 2$ and before buying them all up just wanted to make sure there cool for flying rockets where a c6-5 is recommended.

The difference between the C6-5 and the C6-7 is, of course, two extra seconds of delay before the parachute is ejected.

If your rocket is usually still going up when it ejects its parachute on a C6-5, you *may* be ok with flying it on a C6-7. If your rocket has slowed down and is just about to tip over or pointed down when it ejects on a C6-5, you *DO NOT* want to fly it on a C6-7.

The C6-7 is for small rockets that will coast a long time. Larger rockets, or heavier rockets, do not take as long to slow down, so they need a shorter delay time.

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Roy
nar12605

What rocket do you want to fly them in?

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David Hash
NAR#77967
http://www.Semroc.com

Build yourself an Estes Astron Ranger or Astron Cobra clone and fly it on three C6-7's. At $2 a pack, it's a lot more affordable to cluster than it is at the regular $7 a pack.

The book recommends C6-5's for them, but you can get away with C6-7's on days when it isn't windy.

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I love sanding.

Photon Disruptor II

Interceptor

Red Star

Saturn 1b 4 motor Cluster

The delay is way too long for the Interceptor and Saturn 1B.

It is marginal at best in the Photon Disruptor II. It is BT-55 based compared to the first one that was BT-50 based. Even the smaller original recommended the C6-5.

The Red Star escapes my mind right now.

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I love sanding.

Buy them all, and get into staging. Seriously, I would not pass this deal up.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp

So now you have two great reasons to buy up the C6-7's. Clustering and staging.

BTW, don't forget to get some B6-0 or C6-0 booster motors if you want to try staging.

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I love sanding.

Ive never really looked into staging but its something im sure ill get into eventually. thanks for all the great info.

Then by all means, build a cluster rocket.

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I love sanding.