[BProckets] Grams of powder per pound of rocket

[PACO JOHN]

Hi Bill.  The only size I have total composition weight on is 1 lb.
(3/4" bore tube 7.5" long.  This takes 65 grams of composition which is
hand rammed on std. coring spindle from Rich Wolter.  Composition used
is Potassium Nitrate 64%, airfloat charcoal (pine or grapevine) 18%,
Pine charcoal 40 to 60 mesh 10%, Sulfur 8%.  Comp is sieved 4 times dry
and not milled. You can also damp the dry mix and force through 18 mesh
screen and dry before ramming or pressing to keep down the dust.  In
this case the rockets will have somewhat more thrust and could blow your
tube.  I only press whistle rockets.  (I ram 2 lb and 4 lb. and don't
make 6 lb)  I make more 8 ounce than any other size as I find it a great
size for "flights".  They can loft a surprising amount of stars.
 
John Reilly. 
 
-----Original Message-----
From: bprockets-bounces at amateurrocketry.com
[mailto:bprockets-bounces at amateurrocketry.com] On Behalf Of Bill
McAlister
Sent: Thursday, September 30, 2004 12:52 PM
To: bprockets at amateurrocketry.com
Subject: [BProckets] Grams of powder per pound of rocket
 
Anyone know an aprox amount of powder for say a 1 lb rocket as well as a
3 lb and 6 lb?
 
just trying to get a handel on how much powder i will go through and how
much paper ill want to order when i order my tubes.
 
oh and i know some people ram their BP rockets but ill be useing a press
so how much presure do you press at? I have a Force to presure gauge so
i wont be relighing on the presure gage on the bottle jack.
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