BC Transit – Air Brake Course

Obtaining the mechanical advantage...
The reservoir below, contains compressed air at 10 pounds per square
inch (psi). (atmospheric pressure is considered to be 0.)
0 5 10 25 30 35 40
1 inch dia.
made in
Canada
pounds per sq. in.
If a constant supply of compressed air were directed through a pipe one inch
in diameter, and a one inch plug were placed in the pipe, the compressed air
would push against the plug. Holding a scale against the plug would register
how many pounds of force were being exerted against the plug.
26