Hydraulic Press for BP rockets

[jdurand]

BTW, for anyone making rockets, there's a secret told to me by a mad pyro who writes a column with his hat covering his eyes to protect the guilty...

When figuring your pressure, be sure to account for the fact your rocket has a hole in the middle that varies in diameter with depth. So, you need to start off at lower gauge pressure and increase to max by the top of the spindle used to form the core. That way it's all pressed with the same psi.