CXdriver
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- Jan 21, 2013
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Hi All
I have an Acrosport 1 which is fitted with an O-290-D2 engine. I currently have a Sensenich 74DM6-0-52 prop fitted and I am finding that my cruise performance is pretty poor. I am only getting 100mph at between 2,350 and 2,400 rpm! I am getting good take-off performance and it climbs at 1,200fmp at 80mph indicated (as would be expected with a 52 prop).
The engine has recently been rebuilt and runs very well indeed. It has a tendency to reach red line immediately after take-off if I get the aircraft into ground effect and let it accelerate above 90mph. As a result of this, I find I need to throttle back to keep the RPM below red line on 99% of my departures.
I am considering re-pitching my current prop or putting a 74DM6-0-54 prop on my machine.
I would be happy to sacrifice some take-off/climb performance if I could get a few more MPH from my machine. I am also guessing I will get increased fuel economy/less engine wear due to lower cruise RPM.
The question is, does anybody out there have any experience of operating the O-290-D2 powered Acrosport 1 and what prop would you recommend? What cruise, climb and take-off performance are you getting from that engine(O-290)/prop combination?
Any advice would be very much appreciated.
J
I have an Acrosport 1 which is fitted with an O-290-D2 engine. I currently have a Sensenich 74DM6-0-52 prop fitted and I am finding that my cruise performance is pretty poor. I am only getting 100mph at between 2,350 and 2,400 rpm! I am getting good take-off performance and it climbs at 1,200fmp at 80mph indicated (as would be expected with a 52 prop).
The engine has recently been rebuilt and runs very well indeed. It has a tendency to reach red line immediately after take-off if I get the aircraft into ground effect and let it accelerate above 90mph. As a result of this, I find I need to throttle back to keep the RPM below red line on 99% of my departures.
I am considering re-pitching my current prop or putting a 74DM6-0-54 prop on my machine.
I would be happy to sacrifice some take-off/climb performance if I could get a few more MPH from my machine. I am also guessing I will get increased fuel economy/less engine wear due to lower cruise RPM.
The question is, does anybody out there have any experience of operating the O-290-D2 powered Acrosport 1 and what prop would you recommend? What cruise, climb and take-off performance are you getting from that engine(O-290)/prop combination?
Any advice would be very much appreciated.
J
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