Pressure inside a Gun Barrel
Pressure inside a Gun Barrel
(OP)
Am doing a general interest newsletter article and looking for a good way to give people a comparison of pressure ratings vs common everyday items they would be familiar with. For a high pressure and guessing that pressures are pretty high inside a gun barrel.
Does anyone know the general range of pressures one would find in a gun barrel?
Does anyone know the general range of pressures one would find in a gun barrel?





RE: Pressure inside a Gun Barrel
7.62mm M80 82MPa
50cal M8 124MPa
30mm PGU14 36MPa
105mm M735 16MPa
These are all peak values within the barrel. The last one is interesting, since the pressure is so much lower, but the round is so much heavier that it has a muzzle velocity of 1500m/s. The M735 is an armor-piercing fin-stabilized, discarding sabot round from the 1st generation M1 Abrams tank. The 30mm armor piercing round is from the 30mm cannon used on A-10 Warthog.
TTFN
RE: Pressure inside a Gun Barrel
For this reason, the data for the 30mm PGU14 round seems rather unlikely also.
grampi1, if you can get access to Jane's Ammunition Handbook (online or in hardcopy) you will prob find more info than you ever wanted to know.
cheers
RE: Pressure inside a Gun Barrel
The sim shows peak breech pressure of 432 MPa, peak base pressure of 280 MPa.
PGU14, max breech 371 MPa, max base 365 MPa.
.50 cal, max breech 369 MPa, max base 362 MPa
7.62 mm, max breech 352 MPa, max base 345 MPa.
TTFN