blaplante
Well Known Member
I know that as we climb, the air gets thinner, causing 1) less drag, 2) less HP from the engine and 3) less thrust from a prop per rev. The effects more (or less) equal each other out so that a FP prop that is well matched to the plane isn't suddenly way too fine or way to coarse at altitude.
But does anyone know (for a fixed pitch prop) - as you climb above 7500' will the maximum rpm attainable go up or down or stay the same? I've seen some incidental info that implies it will go down somewhat (maybe 25 rpm per 1000').
My curiosity comes from having a prop that will exceed 2700 rpm at 7500'. I'm wondering if it would do the same at 12500', or would I be able to go WOT and stay under 2700? I suppose I could go burn some fuel and find out but it takes a while to climb and I suspect someone has this info.
Thanks!
But does anyone know (for a fixed pitch prop) - as you climb above 7500' will the maximum rpm attainable go up or down or stay the same? I've seen some incidental info that implies it will go down somewhat (maybe 25 rpm per 1000').
My curiosity comes from having a prop that will exceed 2700 rpm at 7500'. I'm wondering if it would do the same at 12500', or would I be able to go WOT and stay under 2700? I suppose I could go burn some fuel and find out but it takes a while to climb and I suspect someone has this info.
Thanks!