Currently I have an Aymar Demuth 68" X 74" on my RV6. Engine is an O320 D2A.
Take off performance near max weight is OK, but a CS is too tempting to ignore.
My current max airspeed, at sea level and WOT is 165-167kt depending on temperature and weight. I'm told this is reasonably good for an O320 powered 6 so I'd like to avoid losing much top end.
The plane weighs 1000lb and I need more nose weight also. The propeller options are:
MTV-12-C/180-57 - MT 3 blade - 43lbs + governor
Hartzell C2YL-1BF/F7663-4 - 57lbs (I think) + governor
I keep reading that one will tend to lose a few knots with a MT prop. If I lost say 2-3 knots I wouldn't care, but say 7-10 knots would be annoying. I gather this is unlikely to happen with a 2 blade Hartzell.
Does anyone have experience with the MT on an O320? The benefits of the MT are lower weight and smooth running (plus it looks cool).
Obviously I'll have to be sure that the engine can take a CS prop. I know it has the governor drive pad, the correct nose bearings, hollow crank and the oil feed hole in the side of the case. The only thing I don't know yet is whether it has the oil cross tube in the crank, so I'll have to pull the crank plug and find out.
There is also a price difference, it's about $4000 more for the MT. The main annoyance of the Hartzell is that the one which is sold for the O320 is an old design, and the blended airfoil version is only for the 360 and up.
Any thoughts on the above? What would you do?
Take off performance near max weight is OK, but a CS is too tempting to ignore.
My current max airspeed, at sea level and WOT is 165-167kt depending on temperature and weight. I'm told this is reasonably good for an O320 powered 6 so I'd like to avoid losing much top end.
The plane weighs 1000lb and I need more nose weight also. The propeller options are:
MTV-12-C/180-57 - MT 3 blade - 43lbs + governor
Hartzell C2YL-1BF/F7663-4 - 57lbs (I think) + governor
I keep reading that one will tend to lose a few knots with a MT prop. If I lost say 2-3 knots I wouldn't care, but say 7-10 knots would be annoying. I gather this is unlikely to happen with a 2 blade Hartzell.
Does anyone have experience with the MT on an O320? The benefits of the MT are lower weight and smooth running (plus it looks cool).
Obviously I'll have to be sure that the engine can take a CS prop. I know it has the governor drive pad, the correct nose bearings, hollow crank and the oil feed hole in the side of the case. The only thing I don't know yet is whether it has the oil cross tube in the crank, so I'll have to pull the crank plug and find out.
There is also a price difference, it's about $4000 more for the MT. The main annoyance of the Hartzell is that the one which is sold for the O320 is an old design, and the blended airfoil version is only for the 360 and up.
Any thoughts on the above? What would you do?