Hello,
I recently purchased an RV6a and it is not performing as I would expect. It has the following stats:
Speed Test conditions/results
The Catto people have been very responsive and indicate I should be seeing above 190 mph with these stats - putting me atleast 17 mph slow.
I did notice that several of the fairings have started to warp to varying degrees and separate slightly from the airframe. Most look ok, but one upper landing gear intersection fairing has maybe a 1/8 inch to 1/4 inch gap. I tried to tighten some of the fairings with Kapton tape for testing.
I also noticed there is no empenage fairing on the bottom of the horizontal stab/fuse intersection - see pic. Is this normal for an older RV6?
I would love input from the group on where to look:
https://drive.google.com/file/d/0B24jmGdhTc40WDlObWo1TTBnMHZrSVg0TFFBTC1MREllSGpr/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40OV9QS08wcFhmMFJGcDJNVlU1MDA2Q2tWdWh3/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40SlA5MmVlZ3d3VzI2STdQMnJYZEdVWDhPWWp3/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40NGRMZm82TFJOY3pfX2VpSW95WjhjOFFURUhn/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40TXM2TThrR2VUMHJEUV9hY3ZRVldmU29oNVpn/view?usp=sharing
Thoughts?
Thank you,
Reed
I recently purchased an RV6a and it is not performing as I would expect. It has the following stats:
- 1996 RV6A
- 1100 Lbs empty
- 160 hp O-320
- Catto FP 70x70 Carbon with nickel edges
- 91 Octane ethanol free auto gas
- static RPM at DA of 5600, temp 15 C, is 2200 RPM as measured by a GRT EFIS
Speed Test conditions/results
- DA of 8000 ft
- PA 7000 ft
- 4 passes 90 degrees apart, little wind
- WOT , GRT EFIS showing 23.3 inches MP
- fuel flow 9.2 Gph
- RPM Avg 2660
- IAS AVG 159 Mph
- GS avg 173 Mph
The Catto people have been very responsive and indicate I should be seeing above 190 mph with these stats - putting me atleast 17 mph slow.
I did notice that several of the fairings have started to warp to varying degrees and separate slightly from the airframe. Most look ok, but one upper landing gear intersection fairing has maybe a 1/8 inch to 1/4 inch gap. I tried to tighten some of the fairings with Kapton tape for testing.
I also noticed there is no empenage fairing on the bottom of the horizontal stab/fuse intersection - see pic. Is this normal for an older RV6?
I would love input from the group on where to look:
- engine performance? I am hoping you guys can help me rule this out with the RPM and fuel burn data.
- excessive air frame drag?
- prop tuning?
https://drive.google.com/file/d/0B24jmGdhTc40WDlObWo1TTBnMHZrSVg0TFFBTC1MREllSGpr/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40OV9QS08wcFhmMFJGcDJNVlU1MDA2Q2tWdWh3/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40SlA5MmVlZ3d3VzI2STdQMnJYZEdVWDhPWWp3/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40NGRMZm82TFJOY3pfX2VpSW95WjhjOFFURUhn/view?usp=sharing
https://drive.google.com/file/d/0B24jmGdhTc40TXM2TThrR2VUMHJEUV9hY3ZRVldmU29oNVpn/view?usp=sharing
Thoughts?
Thank you,
Reed