05-06-2009, 12:45 AM
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BARCLONE Rocketry
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Quote:
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Originally Posted by Carl@Semroc
Yeah, the nozzle diameter is one of the most critical factors. If it is raised to .07", performance drops about 25% or so. If you lower it to .05", performance goes up (until the cato starts.) The A10 (A13?) will have about a .165" nozzle, but it is in the booster, not in the sustainer.
That is what I mean by "doping" the entrance.
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How difficult is that to do, in terms of automation? I suppose anything's possible within reason.
What about a different approach, like a special 'plug' that you use only in sustainer applications? Think about those Estes igniter retainers (molded plastic), but using that coating material instead? That way, the manufacturing equipment wouldn't have to be changed, and the plug would be no different than what everyone is already used to. Could something like that be made with enough resilience to work without breaking up more times than not? |