SS2S 12" (300mm) booster motor

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SS2S 12" (300mm) booster motor

Postby rick m » Fri Nov 25, 2016 3:09 am

We poured our first 12 x 20" (300 x 500mm) grain for our suborbital booster motor last Saturday at FAR and will be casting more next month for a static test. We will also be static testing our 6" (150mm) second stage motor next month. For the booster motor, each grain has a mass of 130 pounds (~55 km) of propellant.

https://www.flickr.com/photos/48721294@ ... ed-friend/

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Re: SS2S 12" (300mm) booster motor

Postby Jay » Tue Nov 29, 2016 12:31 pm

Big step -- very exciting! Best of luck to everyone at Sugar Shot to Space!

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Re: SS2S 12" (300mm) booster motor

Postby rick m » Wed Dec 07, 2016 9:33 am

Thanks Jay. The first grain looked great and we finished casting a second last Saturday and a third flight of the Phoenix testing electronics.

https://www.youtube.com/watch?v=TSHOonYz_-Q

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Re: SS2S 12" (300mm) booster motor

Postby SANEAlex » Mon Dec 12, 2016 10:59 pm

Congrats on the straight up test flight as Jay said best of luck to all the team and hope things go as well in your next steps
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Re: SS2S 12" (300mm) booster motor

Postby rick m » Sun Dec 18, 2016 7:32 am

Thanks Alex...

We had a very successful static test of the short 2-grain 12" (300 mm) Q-impulse sugar motor today at the FAR site.

https://www.youtube.com/watch?v=TSHOonYz_-Q&t=4s

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Re: SS2S 12" (300mm) booster motor

Postby SANEAlex » Mon Dec 19, 2016 12:53 pm

rick m wrote:Thanks Alex...

We had a very successful static test of the short 2-grain 12" (300 mm) Q-impulse sugar motor today at the FAR site.

https://www.youtube.com/watch?v=TSHOonYz_-Q&t=4s

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That seems to be the same as the last video you posted of the launch test not a static test
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Re: SS2S 12" (300mm) booster motor

Postby rick m » Tue Dec 20, 2016 8:15 am

SANEAlex wrote:
That seems to be the same as the last video you posted of the launch test not a static test


Oops, you're right, the wrong link, try this: https://www.youtube.com/watch?v=eeOVhQKnTfg

and close up of the firing, stain steel divergent cone glowing red hot

SloMo 12 inch nozzle firing.jpg
close up of 12" motor firing
SloMo 12 inch nozzle firing.jpg (26.8 KiB) Viewed 2036 times


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Re: SS2S 12" (300mm) booster motor

Postby lavalamp » Wed Dec 28, 2016 10:46 pm

Based on the video it looks as though the exhaust was slightly under-expanded, is that by design?
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Re: SS2S 12" (300mm) booster motor

Postby rick m » Sat Dec 31, 2016 9:41 am

lavalamp wrote:Based on the video it looks as though the exhaust was slightly under-expanded, is that by design?


The nozzle on this motor was already fabricated before the final specs of the motor were decided. Also, this motor was planned to simply test the viability of casting such large sugar grains that had never been attempted before.

The actual flight booster for the space attempt will have 6 grains (780 pounds of propellant).
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Re: SS2S 12" (300mm) booster motor

Postby rick m » Sun Jul 16, 2017 9:08 pm

So confident am I of making sugar propellant motors that we skipped doing static tests of our new 6" (150 mm) O-5755 motor. We successfully flew it solo and next will be as the booster for our successful 4" (100 mm) motor. After that, the 6" will become the second stage sustainer on our full scale 12" for a space shot.

https://www.flickr.com/photos/48721294@N08/35157240963/in/dateposted-friend/

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