Would c6-7 fly a rocket fine that recommends a c6-5?
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.
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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. |
What rocket do you want to fly them in?
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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. :cool:
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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Photon Disruptor II Interceptor Red Star Saturn 1b 4 motor Cluster |
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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. |
Buy them all, and get into staging. Seriously, I would not pass this deal up.
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So now you have two great reasons to buy up the C6-7's. Clustering and staging. :cool:
BTW, don't forget to get some B6-0 or C6-0 booster motors if you want to try staging. |
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Ive never really looked into staging but its something im sure ill get into eventually. thanks for all the great info. |
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Then by all means, build a cluster rocket. :cool: |
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Hey, what happened to those A8-0's and A10-0T's we were promised? :( |
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I can only make them one at a time and I don't have a DOT number. ;) |
Don't forget photo rockets - the Astrocam 110 recommended the C6-7 simply because the rocket would be pointing down when the ejection went off (and thus, would get a photo of the ground rather than the sky or horizon).
Greg |
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"…the engines you noted below are planned for this year, I just can’t give you and exact date when each will be released…but hopefully all will be available by fall. Check the website starting in August or so for more info." I had asked Estes (via their website's 'Contact Us' form) if they were still planning to re-release any/all of a number of motors I'd heard (on here) they'd been planning to re-lease: A10-0T, A8-0, C11-0, C11-5, and C11-7. |
The C6-7 would be a disaster in the Interceptor and the Saturn 1B. At the very LEAST the recovery system would shred as well as if using a kevlar shock-cord leader you would get a zippered body tube also.
Most often you can get away with using a C6-7 when the C6-5 is suggested if the body tube is BT-50 or smaller in diameter, with BT-55 it can be a tossup- something like a Cherokee-D with fairly low drag and light weight would be okay on a C6-7, whereas a heavy and draggy Interceptor most certainly would NOT. ANYTHING BT-60 or larger will NOT be okay on a C6-7 as a single stage engine EVER; for BT60 and above it better be the upper-stage of a two-stage rocket. |
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They may not be cool for flying your particular rockets, but I'd buy ANY 3-pack of Estes motors for $2 each, whether I had a use for them right now or not. |
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PLEASE don't fly the 1B or the Interceptor on the c6-7! BTW, we need to see photos of your 1B build BEFORE you destroy it by flying it on (4) c6-7's. :D |
You could however fly the Saturn 1B on a cluster of 2xC6-5 and 2xC6-7 though as the ejection charge from the C6-5's will be PLENTY to eject the chute and the -7's just venting to the top of the open tube. This actually would be much easier on the airframe and would be a good way to use C6-7's !
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That's a good idea! I was probably just about to think of that.
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Come now GH, you of all people....... :D :p Back in the '80's I'd fly my DRM all the time on a C6-7 with a 24" chute, had a great pucker factor but never failed to recover safely. That said, not too sure I'd do it now..... :o |
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