[NRV Rocketry] Local sources for rocket supplies?

[Thomas Weeks]

On Friday, June 29, 2012 08:38:29 pm Charles Albright wrote:
[...]
> Tweeks, how do the above prices compare to the cost of the 3F you bought
> locally?

I'm out on vacation right now and would have to look at the pound of 3F that I 
bought locally to tell.. but I seem to remember it being  around twenty-
something.  But if we all went it.. I can't see us getting more that 5lbs all 
together.

I understand that you can use 3F, but that you might have to increase the 
volume slightly to compensate for the slightly slower burn.  But be careful 
with smokeless powder or what's called "pyrodex". That's what's used in black 
powder rifles and it can burn REALLY slow. Far too slow for an ejection 
charge!  Bob can share more about that.. but I would stick with 3F or 4F 
powder. A couple sites I found said that 3F was fine for rocket ejection 
charges.


Tweeks
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