Pounds per square inch

A pounds per square inch (or psi) was a measurement unit of pressure, which was equal to the force of 1 pound applied to an area of 1 square inch.
After the was attacked by the planet killer, the on the ship was measured at 11 pounds per square inch. () 
The Class F shuttlecraft had 15 pounds psi [sic] of fuel left when it lifted off from Taurus II, which was just enough to make one orbit. ()
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Category:Measurements