Does the windmilling effect at best glide speed during engine failure with a CSP (on a single engine airplane) provide enough RPM (with throttle full open) to create the oil pressure needed by the governor to move the prop to full course?
It stands to reason that supply pressure to the governor would be adequate due to the requirement for the engine driven pump to provide sufficient pressure for lubrication even at idle speed, whilst having to be limited by a pressure relief valve at higher revs.
I understand that in the case of a full feathering prop (so not usually fitted to a single), the feed to the governor from the oil tank must be lower than the feed to the engine pump to provide an oil reserve for feathering in case of a leak. That would further suggest that a windmilling prop and governor pressure alone are sufficient.
But with the throttle fully open the pistons have to compress a full charge of air on every compression stroke.
Ah, but you get most of that effort back on the 'power stroke' (even without combustion). So in theory the net position is the engine will windmill quicker with the throttle open, not that I've seen it recommended anywhere....