STAD 12a or there was a nice small unit, which flamed out after three engines were started.
I had one at RAE Bedford SFD, and one wheel fell off, at least it was light enough to pick the unit up and refit it.
Anyway, sod the Palouste or STAD and use the wonderful on-board Rapid Air system, that way, Joe Public gets the best of all worlds, and the anti noise brigade will have something to complain about.