pressure vs altitude and temp vs pressure

[bill wilson]

Thanks to mcaapocci for the altitude tables Show the change in tire pressure when going from 0 ft. altitude,80 f, to 10000 ft. altitude, 32 f. Pa/Pb = Ta/Tb (directly proportional On the absolute scale) 14.7 + 32psig(starting gage pressure) =46.7psia (starting absolute pressure) (14.7-10.1)=4.6 (atmospheric P at start and end point from the tables)(alg' added) + 32psig = 36.6psig (end pressure. assume no temp change) So: we had a temp change of -48 R therefore Ta/Tb= 507/-459 : 36.6psig x 459/507(this ratio is =.905) (delta temp)=33.13=the probable gage pressure at endpoint. Not much !! was it worth it? [Non-text portions of this message have been removed]