I was trying to uses a 30A RC plane speedo to power the compressor but it kept cutting out. Also tried it on 24V set to half speed for 12V compressors but the BEC shut down at 18V so I cut it off. Although it worked on its own it would not work with the drive connected and had terrible interferance. Could have been something to do with not having a voltreg on it and powering the 5V side from the Rx battery. The speedo was rated at 6-12 Cells but the only limiting factor is the BEC, beyond that it will work upto a max of 30V where it would try and clamp the supply.

I still want a 12V compressor to work off a 24V battery that can be controlled from the Rx & a pressure switch. So Im currently building something. Surly someone else outthere must have already done this. If so how did you do it?