JRobinsonUSAF
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- Dec 20, 2011
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What would be considered the largest acceptable gap between the top end of a D booster motor and the nozzle of a D sustainer nozzle to ensure ignition. I am looking at a scale/semi-scale two stager that, if built to specs, would leave a 3 inch gap between the two motors. Is this wishful thinking, or would I be able to get second stage ignition?