[Rocketworkbench] Re: Problems with the star grain analysis

[Frederico P. <fre...@uo...>]

Thanks for the information. When possible I'll take a deeper look in the
star grain analysis and if there are any doubts left, I send them to the
list. I'm really interested in understand a way to obtain a neutral
burning in a rocket. I was really happy to find such a well explained
document like this.

One question: In the analisys, it's said that the r1 is 1/16 inch. What
about the r2, is it, in the example in the end of the analysis, the same
as r1?

Fred

> From: Antoine Lefebvre <an...@sh...>
> Hi Frederico,
> 
> the 'a angle' should always be positive. To be negative, the value of n
> should be > (e+Pi/2), otherwise it is positive.
> 
> For the length of the star "leg", I'm not quite sure exactly what you mean.
> Could you send me an image with this dimension specified? I will check if
> it is ok.
> 
> The radius r1 and r2 could be different.
> 
> Good luck.
> 
> On Sun, Nov 19, 2000 at 02:38:47AM -0200, Frederico Paro wrote:
> > I'm studying the star grain analysis but I couldn't solve some
> > difficulties:
> >
> > The 'a angle' , wich is the angle of the radius r1, if calculated when
> > n>e by the equation a=Pi/2-n+e results in a negative value. Is it
> > correct?
> >
> > I'm don't know how to calculate the lenght of the star "leg", is it
> > L-x+r2 considering wx=0? Is r2=r1?
> >
> > Thanks,
> > Fred
> > --
> >
> >                                                    Frederico Paro
> >                                              (fre...@uo...)
> >                                                  - fredlab.cjb.net -
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> --
> Antoine Lefebvre
> ant...@po...
> 
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-- 

                                                   Frederico Paro
                                             (fre...@uo...)
                                                 - fredlab.cjb.net -