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Old 06-17-2010, 07:26 AM
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CPMcGraw CPMcGraw is offline
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Join Date: Mar 2005
Location: Mobile, Alabama
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Quote:
Originally Posted by blindeye2
Craig;
I was not familiar with the origional Sentinel and thought that you were converting the sustainer in your sim to a two stager. It was an interesting problem to work on.
Maybe soeone will be inspired by the discussion to build something.
Bob


Bob,

In my first attempt, I just cut a 3" section off the sustainer and converted it into a booster, and left the sustainer at 15". The problem was the stability margin of the sustainer. I didn't want to add any ballast to the rocket (it's still just "dead weight", after all), opting instead to increase the fin area and the tube length.

The original was just a single-stage rocket "dressed up" like a two-stage AIM. It used a standard 18mm engine mount, which I slid up into the sustainer. The booster needed the added power of the 24mm engines, so that's what I used to get the stack off the pad.

As I mentioned to rokitflite, be patient. I'm getting interested in it as a build project. The altitude numbers are not beyond the boundaries of my local field.
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