Originally Posted By: paul
No, I am not. m*Ve is zero when you do not have a nozzle which allows for expansion.

if its ZERO then NOTHING will come out.

Wrong, as [Po-Pe](Ae) is non-zero. Ergo you'll have F = 0 + X, where X is equal to whatever [Po-Pe](Ae) equals.

Remember - the formula is the sum, not the multiple of those two terms. A zero on one side of the sum doesn't make the total a zero.