- Aircraft Make / Model
- Work Undertaken
Mike Clark, Staaken Flitzer
I have managed to get some more flying in the Flitzer this morning and can report my findings. The aircraft seems to get off the ground quicker with your prop and initial climb is good. I flew level with full throttle and there is an increase in cruise of 4 mph to 91 mph. This gives 3000 rpm on the gauge which corrects to 3300 actual. I did aVNE dive with no problems. The prop is much smoother in flight than the previous prop.
This afternoon was one of those special occasions when the weather gods came up trumps. I should have worn warmer clothes but that didn’t detract from the half hour of magic in the air. I counted 16 hot air balloons also enjoying the experience.
Hercules prop is performing very well with a 5 mph increase in top speed, a shorter take off roll and a much smoother running engine. In fact it felt like I was in the 17th balloon it was so smooth!
The Staaken Flitzer is a modern day classic. Designed in the late 1980’s, this VW powered sports plane looks every bit as 1920’s as the designer, Lynn Williams, intended it to be. The previous propeller allowed the engine to over rev by a good amount, meaning that cruise speeds were poor and fuel consumption was higher than it should be.
Hercules designed a new propeller to reduce the maximum achievable RPM from 3400 to just 3000, this way making the most of the engine torque and allowing a larger diameter propeller which is more efficient. The result is that the maximum cruise speed increased slightly, no loss of rate of climb and fuel burn in economy cruise reduced from 17 litres per hour to 14 litres per hour.
In keeping with the style of the aircraft, the aesthetics of the propeller was as much of a focus as the flight performance. The ‘barrel’ sided hub is hand stamped and features a recessed, engraved aluminium front plate. The outer blades are painted a custom grey.