Originally Posted by
Clare Prop
...then all was revealed when I asked for the POH for a new type and was handed one of those black A5 "Aircraft Flight Manuals"
Hmmm, tell me about these. Sounds like an Australian thing? Not being an Aus pilot, not quoite sure what you're referring to.
FWIW, the Engine manual for my airplane (C180 with O-470R) recommends setting the lowes RPM at which the engine will run smoothly, which is alway much less than 100XMAP in Inches hg.