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Old 08-03-2019, 08:37 AM
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Jerry Irvine Jerry Irvine is offline
Freeform rocketry advocate.
Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
Posts: 3,702

Originally Posted by 5x7
No, they don't. There isn't a fool prof way to do that with a composite motor.
If you offer a variation of a Thermalite igniter (pyro fuse that fits through nozzle), then direct staging is practical either with a BP booster or a APCP booster with the ejection and cap removed so the delay flame touches off the upper igniter. On an APCP booster motor the delay can be drilled down to as low as 2 seconds.

In the olden days (1978 till 1994) we had them selling.


If AT were to make a D16-2, it would be suitable for the Saturn V RTF as well as USS America like rockets. Free bonus! Good booster for direct staged BP or pyro ignited APCP uppers.
Exemptions not regulations ACHIEVED. U.S. Rockets instaship. Model rocketry is as safe as safe can be defined in human existence. Bow and pray: GH Stine, Orville, Vern, Lee, Lonnie, Carl, etc. No, really. U.S. Rockets released first moonburner Toy Rockets G30, TRA first certified motor: H, invented LMR, HPR, Firestarter, reloadables 1-90, and now . . . ACHIEVED. LDRS first pre-HPR motor 38mm I200!!
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