David-aviator
Well Known Member
Yesterday, with the 8 wound up to fast cruise, I heard (again) a vibration noise coming from the aft end of the air plane. It varied with speed and engine rpm and was bothersome, but not for long. On the next flight, I placed a small towel between the aft seat back and the frame it rests on and the noise is gone. I guess the seat back will need a rubber spacer of some sort to keep it quiet.
The other noise is what sounds like an oil can noise every time coming into the pattern and slowing to approach speed. It always happens just below 100 knots. I do believe it is an engine back fire but don't know for sure.
Can any of you confirm this suspicion? It is at idle power and between 100-90 knots slowing up. The idle power thing is necessary with a fixed pitch prop or this machine will not slow up.
Which is also why it is so difficult to make a 3 pointer with this airplane on a short runway, it does not want to slow down in a timely manner like with a CS prop. I tried the 3 pointers again yesterday and finally said screw this and went back to wheel landings which work just fine.
The other noise is what sounds like an oil can noise every time coming into the pattern and slowing to approach speed. It always happens just below 100 knots. I do believe it is an engine back fire but don't know for sure.
Can any of you confirm this suspicion? It is at idle power and between 100-90 knots slowing up. The idle power thing is necessary with a fixed pitch prop or this machine will not slow up.
Which is also why it is so difficult to make a 3 pointer with this airplane on a short runway, it does not want to slow down in a timely manner like with a CS prop. I tried the 3 pointers again yesterday and finally said screw this and went back to wheel landings which work just fine.