Hello everyone. I've designed a rocket with strap-on boosters (see the designers section) I'd like to try building. But I'm having problems with the main part - the boosters.

Does anyone have good instructions for how to connect the boosters to the main rocket body so they stay on during liftoff and come off cleanly when the boosters burn out?

I found a thread that discussed this problem, but it didn't really have any direct instructions for how to do this.

Thanks for any insight you can provide.

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Dale Marshall, San Antonio Texas
NAR #90990
Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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Back in the Day, CMR made a strap on booster kit called the Marcus. It had a little wire hook at the rear that hooked over the rear edge of the main body tube, and a pointed loop shape up front that you squeezed into a slit made in the main body tube.

Also, two "cradles" made of body tube sections.

It had a short shock cord and streamer. I believe that the force of ejection was supposed to make the strap on fall off.

This might still work on smaller strap ons.

You might also use connectors made from launch lugs and dowels. Fore and aft, designed to keep the booster from sliding forward. And on one on the nose cone that prevents rearward movement until the cone ejects.

I found an article on the Apogee website which shows one way to do strap-on boosters.

Here is the link.

http://www.apogeerockets.com/educat...wsletter260.pdf


Enjoy!

__________________
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Dale Marshall, San Antonio Texas
NAR #90990
Semroc SAM #083

BAR Since 2008
Enjoying model rocketry since 1977.
The Spotted Dragon
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