1 lb rocket whistle

[fr3dopyrox]

hello guys, i want to press 1 lb rocket with whistle mix 64 kp,32 pota benzoat,5 petroleum jelly,1 red oxyde; my press is one 4 tons bottle jack, but i haven't gauge, do you think i can to have problem if i don't see pressure because i haven't gauge?and i can to press hard if this "press have only 4 tons pressure?

[NeighborJ]

Whistle rockets can be made to operate over a wide range of pressures but they will unlikely be reliable without a method of measuring that force. They need to be pressed with a consistent force for each increment, otherwise the fuel can have density variations, week fuel grains or tube damage.

 

It can be done, but hydraulic presses won't allow someone to press accurately by feel.

[Mumbles]

Here's some ideas for a cheap pressure to force gauge. http://wichitabuggywhip.com/fireworks/ptof/ptof.html