02-01-2021, 08:41 AM
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rocket dinosaur
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Join Date: Mar 2005
Location: My Old Kentucky Home
Posts: 1,184
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Quote:
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Originally Posted by tdracer
Perhaps someone from Aerotech can chime in, but I successfully drilled an F40-4W down to less than a second delay from burnout - story here:
https://www.oldrocketforum.com/showthread.php?t=18716
In short, staged a composite F40W to a BP F15-6 on an Estes Mammoth, using the F40W ejection charge to light the F15. Worked like a charm. My intent was for the ejection charge to fire less than a second after burnout - which is just what happened.
My concern with doing that AP to AP is that AP is far harder to ignite than BP - I don't think 4F black powder will reliably ignite AP. Perhaps if some small bits of AP propellant were added to the BP ejection charge?
I'd certainly do some ground testing before I tried flying it... |
thta's what my idea encompasses....the actual delay would be replaced with a plastic plug that has running down the center a smaller diamter tube that goes up into the throat of the 2nd stage. this smaller diameter tube contains a fast burning composite that is the new delay charge....it should be hot enough to ignite the 2nd stage.
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"Old Rocketeer's don't die; they just go OOP".....unless you 3D print them.
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