smokyray
Well Known Member
To answer some performance and trim questions on the Matronics List I went out and flew yesterday! Thought I would share the data on my 15 year old HR2, FYI
I took my HR2 out yesterday evening during our unseasonably cool FL Swamp weather (34 degrees F) and made some speed runs specifically to look at my horizontal at various speeds. To compare, I know exactly where my RV4 was at different speeds in the 15 years I flew it and I changed the incidence based on several RV8R articles and Van's input to level it at high cruise. My fear at that time was the slow speed STOL characteristics would translate into a "float". None of this proved true and my RV4 actually trimmed and flew much better at high cruise after the change. I am approaching 1000 Rocket hours now, so I think I'm starting to get the hang of it too
My Rocket was documented in the logs that they set the horizontal based on John's plans and incidence settings which I believe is 2 degrees down incidence. It is a very early HR2 (1994) and has a stock RV4 tail with .020 tail feathers, stock HR2 cowling, 285HP Ly-Con IO540, 2 blade Hartzell D twist and One EIectroair Electronic Ignition running Automotive Denso L14U plugs, One Magneto running REM-37BY (hot) plugs, (my standard setup on my last two airplanes). I have larger tires (380 X 150 X 5) Van's Pressure recovery pants set high enough to clear 3" stones and a large size Aviation products dual fork tailwheel.
At 1/2 fuel, a 100 LB passenger 23 squared and 2000 MSL yesterday I was indicating 208 mph and showing 171 Knots GS, elevator trim level, elevator very slightly up. At 24 squared speed increased to 223 MPH indicated, 184 Knots GS. elevator trim 3 degrees down, elevator perfectly level. 25 squared yielded 235 MPH, 195 Knots GS, trim two full clicks down (5 degrees) and still a level elevator. Full throttle showed 29" MP, 2750 RPM, 252 MPH 209 Knots GS, 3 clicks (8 degrees fwd) and elevator level. The amazing part is I came back to my 1500 foot strip and my FAS was 63 Knots over the trees, touchdown at 58 Knots. What a great airplane!
Hope this data helps.
Smokey
HR2
I took my HR2 out yesterday evening during our unseasonably cool FL Swamp weather (34 degrees F) and made some speed runs specifically to look at my horizontal at various speeds. To compare, I know exactly where my RV4 was at different speeds in the 15 years I flew it and I changed the incidence based on several RV8R articles and Van's input to level it at high cruise. My fear at that time was the slow speed STOL characteristics would translate into a "float". None of this proved true and my RV4 actually trimmed and flew much better at high cruise after the change. I am approaching 1000 Rocket hours now, so I think I'm starting to get the hang of it too
My Rocket was documented in the logs that they set the horizontal based on John's plans and incidence settings which I believe is 2 degrees down incidence. It is a very early HR2 (1994) and has a stock RV4 tail with .020 tail feathers, stock HR2 cowling, 285HP Ly-Con IO540, 2 blade Hartzell D twist and One EIectroair Electronic Ignition running Automotive Denso L14U plugs, One Magneto running REM-37BY (hot) plugs, (my standard setup on my last two airplanes). I have larger tires (380 X 150 X 5) Van's Pressure recovery pants set high enough to clear 3" stones and a large size Aviation products dual fork tailwheel.
At 1/2 fuel, a 100 LB passenger 23 squared and 2000 MSL yesterday I was indicating 208 mph and showing 171 Knots GS, elevator trim level, elevator very slightly up. At 24 squared speed increased to 223 MPH indicated, 184 Knots GS. elevator trim 3 degrees down, elevator perfectly level. 25 squared yielded 235 MPH, 195 Knots GS, trim two full clicks down (5 degrees) and still a level elevator. Full throttle showed 29" MP, 2750 RPM, 252 MPH 209 Knots GS, 3 clicks (8 degrees fwd) and elevator level. The amazing part is I came back to my 1500 foot strip and my FAS was 63 Knots over the trees, touchdown at 58 Knots. What a great airplane!
Hope this data helps.
Smokey
HR2