I filled my air tanks up to 100 PSI, and then cycled the retracts to see how many up and down of the gear I can get.  

a total of 8 cycles were performed.  By the last one, the pressure was not high enough to fully retract the tail wheel.

this is on a CARF P-47 with Sierra Air retracts.

This is also using the JETI sequencer and two of the JET - TRONICS valves.