Originally Posted by Franc Rauscher
A nozzle is just a small piece of pipe unless a fluid is being forced thru it. That takes pressure. At least it does here in Missouri.
There are no moving parts in a ram jet engine except, the ram jet engine's movement thru the air. Therefore a ram jet engine has virtually no thrust untill it achieves some velocity.,,,,,enough to form compression in what engineers call the "compression chamber"
A ram jet won't even start unless air is flowing thru it.
Air can be compressed by movement of the collector, or ram, thru the atmosphere
I know lol, I'm not denying that the air is pressurized, it is at 14.6 psia, or 0 psig. The concept of ram air is based on velocities... There is no mention of velocity in the ideal gas law, only pressure (F/A), volume(LWH), temperature, mass and a constant. A jet engine's thrust comes from flow of expanding exhaust gases through nozzle ... not intake air
. A turbo/turbine creates pressure due to expanding exhaust gases.