I remember my instructor telling me, in 1950 when he was quite old (about 30 perhaps) to "tickle Mary Pickford for forty glorious hours". Trim set for take off, throttle friction nut tight, mixture rich, pitch fully fine, fuel sufficient, gills set, gyros errect and synchronised, hood (open in Harvard), harness tight, hydrulics OK. With small alterations it fits most aircraft. But who/what is Mary Pickford?