wyo17
Well-Known Member
- Joined
- Jul 4, 2012
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Looking for some advice, have built and flown a couple of HP 2 stage rockets, with pretty good success. The 1st was a 4 Dominator, 13 tall, boosting on a CTI K-2045 to a CTI K-445. [video=youtube;jMa_eijr4EY]https://www.youtube.com/watch?v=jMa_eijr4EY[/video]
And have since flown it on boosting on a CTI L-1720 to a L-3200.
Got 5 flights with it each time lighting the sustainer from a Raven 3rd channel in the sustainer.
The inter-stage coupler is built to withstand sustainer ignition separation, hence coated with a very thick application of West System epoxy.
The L to L flight showed a little bit of wobble with the inter-stage coupler after the boost which provided a little off vertical axis by about 5 degrees. Landed about a mile away.
Looking at doing an M to M at Balls this year to about 40k. Thinking of boosting on an M-1101 to an M-840. Get the long burn on both the bottom and top. 4.7s boost to a 9s sustainer.
Currently the inter-stage coupler has an Adept 22 solely for recovery. Ignition of the sustainer is from the Raven in the second stage.
Questions:
1. Should I change the altimeter in the inter-stage coupler to provide a separation charge and then deployment charge of recovery stage of booster? If so should I put shear pins in the coupler?
2. How close should the separation of the booster and sustainer ignition should it be?
3. Thinking of controlling ignition of the sustainer from the ground, in the event it is off axis. The M-1101 is enough to get the sustainer to an altitude to say a 1500-2000 main deployment.
Your thoughts appreciated.
Thanks
Pat
And have since flown it on boosting on a CTI L-1720 to a L-3200.
Got 5 flights with it each time lighting the sustainer from a Raven 3rd channel in the sustainer.
The inter-stage coupler is built to withstand sustainer ignition separation, hence coated with a very thick application of West System epoxy.
The L to L flight showed a little bit of wobble with the inter-stage coupler after the boost which provided a little off vertical axis by about 5 degrees. Landed about a mile away.
Looking at doing an M to M at Balls this year to about 40k. Thinking of boosting on an M-1101 to an M-840. Get the long burn on both the bottom and top. 4.7s boost to a 9s sustainer.
Currently the inter-stage coupler has an Adept 22 solely for recovery. Ignition of the sustainer is from the Raven in the second stage.
Questions:
1. Should I change the altimeter in the inter-stage coupler to provide a separation charge and then deployment charge of recovery stage of booster? If so should I put shear pins in the coupler?
2. How close should the separation of the booster and sustainer ignition should it be?
3. Thinking of controlling ignition of the sustainer from the ground, in the event it is off axis. The M-1101 is enough to get the sustainer to an altitude to say a 1500-2000 main deployment.
Your thoughts appreciated.
Thanks
Pat