[AR] Re: Sugar Rocket State of the Art?
- From: "Monroe L. King Jr." <monroe@xxxxxxxxxxxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Mon, 13 Oct 2014 19:00:41 -0700
I think thin stainless is far better than aluminum for performance
including APCP motors.
Monroe
> -------- Original Message --------
> Subject: [AR] Re: Sugar Rocket State of the Art?
> From: Ben Brockert <wikkit@xxxxxxxxx>
> Date: Mon, October 13, 2014 5:53 pm
> To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
>
>
> A decade ago Richard Nakka found that brown iron oxide had unexpected
> burn rate enhancement properties in KNSB:
> http://www.nakka-rocketry.net/oxidex.html
> As of earlier this year no one had followed up with more data:
> //www.freelists.org/post/sugpro/brown-iron-oxide-burn-rate-enhancer,2
>
> The old Sugpro went down and a new one was put up, but there has been
> no traffic in recent months: //www.freelists.org/list/sugpro
>
> Rick Maschek has taken over leadership of Sugar Shot to Space from
> Richard Nakka. He's now planning a two stage rocket rather than two
> burn, which gets rid of one of the most consistently unsolved issues
> of that program.
>
> I did a number of FEA tests on sugar propellants using material
> properties experimentally found by Nakka and showed that you can't
> make really large case bonded sugar rockets with aluminum cases
> because the case stretches more than the propellant and it cracks. At
> some point I need to re-run that with a high modulus case design like
> carbon overwrapped stainless.
>
> original results:
> http://sugarshotsolidworks.wordpress.com/2012/05/15/casebonded-grain-stresses/
> narrative: http://sugarshotsolidworks.wordpress.com/2012/05/16/49/
> more posts on random SS2S topics, mostly not sugar propellant:
> http://sugarshotsolidworks.wordpress.com/
>
> Ben
>
>
> On Mon, Oct 13, 2014 at 9:33 AM, Ray Rocket <dmarc-noreply@xxxxxxxxxxxxx>
> wrote:
> > Hey all,
> >
> > I took some time off post 9/11 and am just starting to dip my toes back
> > into rocketry.
> > When I last made motors, I was exploring sugar.
> > Have there been any significant advances in the field during my hiatus?
> >
> > What is the current state of art with sugar?
> > Largest diameter sugar motor?
> > Highest total impulse?
> > Does anybody know the current sugar altitude record?
> > Have there been any interesting/notable advances in the art?
> >
> >
> > Ad Astra,
> >
> > Ray
> >
> >
> >
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