When you fly it, at what RPM are you running for the stated speed?
As mentioned, more data is required.
With our 1105 # (empty) RV6, O320 - 160HP, Ed Sterba Wood Prop (forgot the pitch) at 4500 ft, ~25+" MP and ~2600 (2650??) RPM with OAT of ~65*F, I was getting a True Airspeed of 160-163 knots. Pushed it a little harder and got to 165 kts.
Normally plan for 150 knots.
I have been able to turn up to 2850 RPM during flight testing but I do NOT run it at that RPM.
Do a few runs and report back with the data.
Many people will sasy go to 8000-8500 feet and push the throttle to wide open. Let it settle (do not go beyond any limits your equipment may have) and record the results.
Capture GPS groundspeed, Indicated Airspeed, Heading, Outside Air Temperature and Barometric Pessure for the area on 3 tracks 120 degrees apart or 4 at 90 degrees apart.
Another area ... if your flaps are ALL THE WAY UP and if you hold one of the ailerons perfectly aligned with the flap, is the OTHER aileron and flap aligned **and** are the wingtips on BOTH sides ALSO aligned with all of this???
Third idea (don't remember if this was mentioned already) ... are the gear leg/fuselage fairings staying in place during flight?? Are the screwed on and NOT moving? I have personally seen one of these slip down in flight on a friends plane and it REALLY slowed him down.
Just a few thoughts.
GOod luck,
James
baisicrv said:
Was hoping for any suggestions that came out of this thread to see what to look for on my 6a.I did not build but am going through it to clean it up.I am runnning the 0320-160 hp,sterba wood prop and older wheel pants.I only can get 150 mph at 7500 feet using gps in triangle pattern to count out wind factor.I am replacing wheel pants with new style shortly.Any other suggestions on what to look for that slows them down?Thanks