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ROTON type engines and liquid monopropellants



 
 
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  #11  
Old October 24th 09, 01:11 PM posted to sci.space.tech
RalphE
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Posts: 6
Default ROTON type engines and liquid monopropellants

On Oct 23, 4:12 am, Jim Davis wrote:
Earl_Colby_Pottinger wrote:
I would just like to point out that I am not just asking about
ROTON type system for no reason. I am planning to build a test
model over the next month or two.


Earl,

You might want to ask on the arocketry mailing list:

http://www.arocketry.net/

A number of former Rotary Rocket employees post there.

Jim Davis


The person you want is Bevin McKinney, he designed the original Roton
engine. These days he works HMX together with Gary Hudson (designer of
the Roton vehicle). Their website is at http://www.hmx.com/. Bevin's
email is zerog(at)centurytel(dot)net He's a very nice guy and won't
mind at all if you contact him .

Ralph

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  #12  
Old October 29th 09, 03:36 AM posted to sci.space.tech
Earl_Colby_Pottinger
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Posts: 7
Default ROTON type engines and liquid monopropellants

On Oct 24, 8:11 am, RalphE wrote:

The person you want is Bevin McKinney, he designed the original Roton
engine. These days he works HMX together with Gary Hudson (designer of
the Roton vehicle). Their website is athttp://www.hmx.com/. Bevin's
email is zerog(at)centurytel(dot)net He's a very nice guy and won't
mind at all if you contact him .


Thank you for the email address, I am on a trip to Florida next
weekend so it probably will be a while before I can email him.

At the present moment I am having problems finding a supplier of
silver mesh (the company I dealt with before no longer handles it),
and I am looking into other designs that can use silver wire available
for local jewerly supply companies.

Presently, based on some research I have done it looks like I can make
90% H2O2 breakdown using only the heat generated by it's own
decompostion to keep the engine running, but the time this takes
requires a total mean path of over 14 inches. (URL to PDF to supply
later). This I intend to do by making the entire rotor arms into a
regenative motor designs, meaning the rotor needs to 18 inches in
diameter..

I will post more after I find out how hard it is to get the silver
that I require.

  #13  
Old September 4th 17, 03:10 AM posted to sci.space.tech
[email protected]
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Posts: 1
Default ROTON type engines and liquid monopropellants

On Sunday, September 6, 2009 at 2:38:45 AM UTC+1, Earl_Colby_Pottinger wrote:
I was just thinking about monopropellants. Most have low ISPs compare
to bi-propelleants but can be very dense. ie Peroxide/Alcohol mixes
for example.

Since ROTON type engines are self-pressuring, one can build a system
with very light weight tanks and high expansion ratio engines. Could
the mass ratios of such a design lead to a reasonable TSTO rocket?

Earl Colby Pottinger


 




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