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Old 05-03-2009, 01:51 AM
Tau Zero's Avatar
Tau Zero Tau Zero is offline
Incurable SEMROC Fan
Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 2,207
Exclamation New Design -- Envoy

Here's an old (2005) previously unreleased rocket design with a new name (which only took me almost 4 years to come up with): Envoy.

Please note the additional screw eye at the base of the nose cone in the payload section.

This is apparently more of my "What Was Old is New Again" department.


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Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131

"Your lightyears may vary."

“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
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Old 05-03-2009, 01:39 PM
Mark II's Avatar
Mark II Mark II is offline
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Join Date: Dec 2006
Location: Back Up in the Woods
Posts: 3,657

Hmmm.... I'm wondering if this could be made into a two-stager... Put a 3-motor inline cluster in the booster, with a booster engine in the middle, and two short-delay engines in the outboards, and then have it gap-stage to a mini engine in the sustainer, with separation just below the ring tube. The transition would have a pass-through tube, connected to the stuffer in the booster with a coupler. Placed in alongside the stuffer tube would be one or two small parachutes for booster recovery. The ejection charges from the booster's outboards would blow off the transition and release the chutes (after the sustainer has left, of course). The pass-through tube in the transition would separate from the booster's stuffer tube at the aforementioned coupler. The sustainer would recover with a streamer. Hmmm...

But would all that additional mass mess up the stability margin? I am just thinking out loud as I type, here - I haven't simmed any of this.

Nice design in any event. But considering where it comes from, I would expect no less!

Mark S. Kulka NAR #86134 L1,_ASTRE #471_Adirondack Mountains, NY
Opinions Unfettered by Logic • Advice Unsullied by Erudition • Rocketry Without Pity
SAM # 0011
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