Hello everyone, I'm attempting to determine the impulse that can be generated by expelling compressed air from a pressure vessel stored aboard a moving craft through nozzles in the nose of the craft. The vessel has a forward momentum of roughly 2,000,000 Ns. EDIT: For semantics sake, consider that the pressure vessel has an internal volume of ~100-200ft^3 and that the air contained within is of a pressure not to exceed 4000psi. The number of nozzles is variable but I would imagine no more than 10 (I have no actual justification for this number). I'm trying to figure out how to optimize a reverse air thruster (think a combination of what happens when you shear the valve stem of a compressed air canister and the Reaction Control System which provides attitude control to the space shuttle) so that we consume the least amount of stored compressed air and provide maximum thrust in the opposite direction of the momentum, ideally to slow the craft to a near stop within roughly 10 seconds. Forces acting on the craft include momentum in the negative x and negligible drag in the positive x direction. Forces in the Y direction negate each other. Any help you can give in conceptualizing the problem would be appreciated! Thanks!