Thanks to all that replied.
I understand that if you start of with say 25" and 2500RPM and then reduce to 25" and 2000RPM then the amount of power being developed is less.
But why should the thrust being produced by the propeller be decreased as well?
If we were to stand behind the propeller at 25"/2500RPM and measure the thrust and then do the same at 25"/2000RPM, shouldn't we feel the same?
I ask this because even though at 25"/2000RPM less power is being produced, the blade will slice a larger chunk of air because it is in a coarser position so even though the rate of air acceleration being produced by the prop is lower at the 25"/2000RPM combination, the larger chunks of air that the prop takes should mean that thrust pretty much stays the same - right??
Thanks to all that reply.....
