We had been looking for a new prop for ‘GY, so we decided to commission a new wooden propeller to be built by Hercules Propellers in Stroud (as our engine isn’t approved for metal ones.) She was previously fitted with an **** prop that was having some performance issues. She is powered with a 90 horse’ C-85/O-200 hybrid and we were previously getting the following figures with the **** (with was 68”/44”);
**** Cruise: 80kts. Rate of climb, full weight: 450 ft/min. Solo: 650ft/min
From installing the newly-made prop which was specially calculated to the correct dia/pitch we have had a good increase in performance. The Herc’ is 70”/50” and we are now getting…
Hercules Cruise: 85-90kts. Rate of climb, full weight: 550-600 ft/min. Solo: 900ft/min
Overall a vastly superior set of figures. Not to mention, it’s vastly improved the aircraft’s appearance and is definitely worth it.