Van's Air Force
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RV-8 True Airspeed
- Thread starter celstar
- Start date
177 KTAS at 8,000' according to my Phase 1 test records. All levers fully forward and bending!
flickroll
Well Known Member
I have seen as high as 182 KTAS ROP on 9.5-10 gph, verified with GPS . If I'm in economy mode I'll see low to mid 170's KTAS on about 8.5 pgh. If I lean much from there the TAS starts dropping off pretty fast, and I don't like going slow 
. I have an O-360-A1A with a Whirlwind 200 RV cs prop, and Slick mags.
. I have an O-360-A1A with a Whirlwind 200 RV cs prop, and Slick mags.AirbusPilot
Well Known Member
Last time I flew my 8 with all levers full forward this it what I got
TAS: 188 kts
IAS: 174 kts
Altitude: 4050 ft
OAT: 18 C or 64,4 F
My 8 is standard build by plans, I have a Lycoming YIO-360-M1B with Hartzell prop.
Uploaded with ImageShack.us
TAS: 188 kts
IAS: 174 kts
Altitude: 4050 ft
OAT: 18 C or 64,4 F
My 8 is standard build by plans, I have a Lycoming YIO-360-M1B with Hartzell prop.
Uploaded with ImageShack.us
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celstar
Well Known Member
10 MPH Slow?
Here are my speeds, Looks to be about 10MPH slow?
8600 msl 8000agl. / 2500 RPM = 157 IAS 185 TAS
" " / 2670 RPM = 167 IAS 193 TAS (2670 RPM was MAX)
Not sure why, Superior O360 A1A with rollers everything cordinated no Rudder tab or wedge needed no heavy wing. Sensenich 72FM8S9-1 (85) prop.
Any ideas were to look for the 10 MPH?
Here are my speeds, Looks to be about 10MPH slow?
8600 msl 8000agl. / 2500 RPM = 157 IAS 185 TAS
" " / 2670 RPM = 167 IAS 193 TAS (2670 RPM was MAX)
Not sure why, Superior O360 A1A with rollers everything cordinated no Rudder tab or wedge needed no heavy wing. Sensenich 72FM8S9-1 (85) prop.
Any ideas were to look for the 10 MPH?
fl-mike
Well Known Member
Any ideas were to look for the 10 MPH?
I'd start with your static ports! (unless you have validated the speeds)
Are you using the stock ports or aftermarket?
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wrongway john
Well Known Member
Here are my speeds, Looks to be about 10MPH slow?
8600 msl 8000agl. / 2500 RPM = 157 IAS 185 TAS
" " / 2670 RPM = 167 IAS 193 TAS (2670 RPM was MAX)
Not sure why, Superior O360 A1A with rollers everything cordinated no Rudder tab or wedge needed no heavy wing. Sensenich 72FM8S9-1 (85) prop.
Any ideas were to look for the 10 MPH?
Do you have a plenum? Pressure recovery wheelpants? Thost last two things should get you about 8 or 9 more mph if you don't have those already.
celstar
Well Known Member
wrongway john
Well Known Member
I was thinking specifically of the plenum. Is Van's selling these along with the cowlings now? Most report about 5 mph by adding the plenum just under the cowling.
Sounds like you have a well rigged plane. It should be screaming past Van's specs if the engine is timed right and everything good there.
Do you remember the OAT when you did your numbers?
celstar
Well Known Member
Sounds like you have a well rigged plane. It should be screaming past Van's specs if the engine is timed right and everything good there.
Do you remember the OAT when you did your numbers?[/QUOTE]
OAT was 82F, Plane is rigged well, runs well and has good compressions with only 136 TTE.
Do you remember the OAT when you did your numbers?[/QUOTE]
OAT was 82F, Plane is rigged well, runs well and has good compressions with only 136 TTE.
wrongway john
Well Known Member
Don?t have any conversion charts before me, but that explains a few mph you've cheated yourself out of right there.
panhandler1956
Well Known Member
Some intial readings from down low. I have IO-360-A1A with 10:1 pistons spinning an Hartzell with 7666 blades.
Flying with my RV-4 buddy in tow (180hp c/s), all levers full forward I showed 212 mph true at 2500'.
I haven't done any calibration yet, but it did roughly match the readings from the -4 on my wing - I was actually pulling away.....
Flying with my RV-4 buddy in tow (180hp c/s), all levers full forward I showed 212 mph true at 2500'.
I haven't done any calibration yet, but it did roughly match the readings from the -4 on my wing - I was actually pulling away.....
lluciani
Active Member
I see roughly 165-170 KTAS near gross at 8000 with my fixed pitch at 2700 RPM. Density altitude where I fly is almost aways well above MSL. I can't go to full throttle because 2700 is red line. My prop is the Sensenich Vans sells for O360. My engine is a Superior IO-360.
Luis Luciani
RV8
Luis Luciani
RV8
RV10inOz
Well Known Member
I have been through this dilema myself.....slowest RV10 in the world
Then Kevin Hortons wise words kicked in.
Take your plane out and fly a GPS box and work out what your REAL TAS was, and while flying the box keep your plane rock steady straight and level so whatever power setting you are using for the test yields the same IAS. Smooth air helps. Calculate your TAS or from your EFIS.
Compare your calculated TAS with the GPS box TAS.
You may find the static is being positively pressurised giving you a lower IAS and a lower TAS.
You may find the opposite. With some experimenting with rivets glued to my statics I went from -9knots to +6 knots, in the end I ended up with this....
Then Kevin Hortons wise words kicked in.
Take your plane out and fly a GPS box and work out what your REAL TAS was, and while flying the box keep your plane rock steady straight and level so whatever power setting you are using for the test yields the same IAS. Smooth air helps. Calculate your TAS or from your EFIS.
Compare your calculated TAS with the GPS box TAS.
You may find the static is being positively pressurised giving you a lower IAS and a lower TAS.
You may find the opposite. With some experimenting with rivets glued to my statics I went from -9knots to +6 knots, in the end I ended up with this....
jjconstant
Well Known Member
calibrated airspeed
Can't emphasize the importance of calibrating your static source enough. I went through LOTS of alterations to the static source before I had consistent readings from fast cruise to slow flight. All are now consistently reading 3 knots faster than actual and I called it good enough and documented my calibrated airspeed. But it took a LOT of testing and reshaping to get it that close.
You could EASILY be off by 10 kts and not know it. When I first tested it was off by 15kts, but on the fast side. I knew it was too good to be true but it sure made it easy to bite the bullet and fix it.
Procedures are well described elsewhere and +1 for Kevin Horton's terrific contributions to our community for making his flight testing resources available on his website.
Jeremy Constant
RV7A 120hrs
Can't emphasize the importance of calibrating your static source enough. I went through LOTS of alterations to the static source before I had consistent readings from fast cruise to slow flight. All are now consistently reading 3 knots faster than actual and I called it good enough and documented my calibrated airspeed. But it took a LOT of testing and reshaping to get it that close.
You could EASILY be off by 10 kts and not know it. When I first tested it was off by 15kts, but on the fast side. I knew it was too good to be true
but it sure made it easy to bite the bullet and fix it.Procedures are well described elsewhere and +1 for Kevin Horton's terrific contributions to our community for making his flight testing resources available on his website.
Jeremy Constant
RV7A 120hrs
F1Boss
Well Known Member
Piece o cake! And fun...
East static port calibration method:
Make a low pass (@ cruise speed) at your home field at maybe 50' AGL. compare your indicated alt with what you know it should be. Make the appropriate adjustments to your port until you see field elev + 50.
Dunno about the low pass brouhaha, but this could be another explanation for doing that maneuver.
Carry on!
Mark
Can't emphasize the importance of calibrating your static source enough. I went through LOTS of alterations to the static source before I had consistent readings from fast cruise to slow flight. All are now consistently reading 3 knots faster than actual and I called it good enough and documented my calibrated airspeed. But it took a LOT of testing and reshaping to get it that close.
You could EASILY be off by 10 kts and not know it. When I first tested it was off by 15kts, but on the fast side. I knew it was too good to be true
Procedures are well described elsewhere and +1 for Kevin Horton's terrific contributions to our community for making his flight testing resources available on his website.
Jeremy Constant
RV7A 120hrs
East static port calibration method:
Make a low pass (@ cruise speed) at your home field at maybe 50' AGL. compare your indicated alt with what you know it should be. Make the appropriate adjustments to your port until you see field elev + 50.
Dunno about the low pass brouhaha, but this could be another explanation for doing that maneuver.
Carry on!
Mark
except that you will not know you are at exactly 50ft therefore introducing additional error. You can't use the instrument itself as truth data since it is being tested. Besides flying an AGL reference doesn't help even if you knew you were exactly at 50FT AGL throughout the test unless you know the ground reference from start to finish is at the same MSL. If the runway has slope and you maintain exactly 50ft agl (somehow) you'll still invalidate the test.
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David-aviator
Well Known Member
I have a standard Vans ASI hooked up to the standard pitot/static source.
Next to it is a Dynon D10A hooked up to the same static source but its own pitot tube.
The Dynon always indicates 2-3 knots less than the ASI and it also computes TAS. As near as can be determined with GPS data, the Dynon is accurate to within a knot or two.
The static pressure source with this RV-7A seems to be OK. I did have a major problem with static pressure in another airplane but not this one.
Next to it is a Dynon D10A hooked up to the same static source but its own pitot tube.
The Dynon always indicates 2-3 knots less than the ASI and it also computes TAS. As near as can be determined with GPS data, the Dynon is accurate to within a knot or two.
The static pressure source with this RV-7A seems to be OK. I did have a major problem with static pressure in another airplane but not this one.
These are the RV-8/8A speeds recorded in SARL since 2007
This is not a perfect fit to your question but it does provide a lot of historical max speed data on RV-8s without altitude restrictions. The RV Red class has 320 cu. in. RV Blue Class is limited to 360 cu. in. and the RV Gold can have 390 cu. in. You will note that John Huft flew in the Blue and Gold Classes. It is the same airplane and engine (IO 360), he just felt sorry for the rest of us Blues and decided to take on the 390s in the Gold Class.
Bob Axsom
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Huft, John 217.17 249.91
Rocket 100, 2010 11/20/10 RV Gold RV-8 Huft, John 205.39 236.36
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Huft, John 204.56 235.40
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Ross, Jon 202.59 233.14
AirVenture Cup 2010 7/26/10 RV Gold RV-8 Huft, John 201.97 232.42
Grace Flight 2009 10/4/09 RV Blue RV-8 Huft, John 201.71 232.12
Taylor 100 2009 3/16/09 RV Blue RV-8 Huft, John 201.29 231.64
AirVenture Cup 2008 7/27/08 Sport FX RV-8 Martin, Dick 202.28 231.63
Pagosa Springs 2010 9/26/10 RV Gold RV-8 Huft, John 200.93 231.07
Colorado 150, 2008 6/29/08 RV Blue RV-8 Huft, John 199.27 229.31
Pagosa Springs 100 2009 9/27/09 RV Blue RV-8 Huft, John 199.38 229.29
Rocket 100 2008 11/23/08 RV Blue RV-8 Huft, John 197.43 227.20
Texoma 100 4/25/10 RV Gold RV-8 Ogden, Deene 197.15 226.72
Rocket 100, 2010 11/20/10 RV Gold RV-8 Ogden, Deene 196.89 226.58
Memorial 130, Terrell, TX 5/28/11 RV Gold RV-8 Hajek, Jerry 196.00 225.55
Lone Star Air Rally 5/14/11 RV Gold RV-8 Hajek, Jerry 195.77 225.29
Rocket 100, 2010 11/20/10 RV Blue RV-8 Rovey, Jason 195.44 224.90
Rocket 100, 2007 11/18/07 RV Blue RV-8 Huft, John 194.78 224.15
Sulphur Springs 130 7/18/10 RV Gold RV-8 Ogden, Deene 194.59 223.94
Rocket 100, 2010 11/20/10 RV Gold RV-8 Hajek, Jerry 194.43 223.74
AirVenture Cup 2007 7/23/07 Sport FX RV-8 Martin, Dick 194.36 223.67
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Carroll, Alan 193.76 222.97
Tennessee Valley Air Race 2010 10/30/10 RV Blue RV-8 Rovey, Jason 193.50 222.72
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Rovey, Jason 193.53 222.72
Texoma 100, 2008 4/20/08 RV Blue RV-8 Christman, Dave 192.88 222.00
Tennessee Valley Air Race 2010 10/30/10 RV Blue RV-8 Carroll, Alan 192.07 221.07
Texoma 100, 2011 4/16/11 RV Gold RV-8 Hajek, Jerry 192.17 221.07
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Ross, Jon 192.04 221.00
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Carroll, Alan 191.77 220.68
Big Sky Air Race 7/9/11 RV Blue RV-8 Rovey, Jason 191.31 220.15
Indy Air Race 8/13/11 RV Blue RV-8 Carroll, Alan 191.29 220.14
2011 West Tesas 100 6/18/11 RV Blue RV-8 Rovey, Jason 190.36 219.07
AirVenture Cup (TH) 2011 7/25/11 RV Gold RV-8 Ring, R. Damon 190.31 219.00
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Huft, John 189.13 217.69
AirVenture Cup 2010 7/26/10 RV Blue RV-8 Ross, Jon 189.01 217.51
Taylor 100 2009 3/16/09 RV Blue RV-8 Carroll, Alan 188.96 217.46
Great Canadian Air Rally 2010 8/22/10 RV Blue RV-8 Carroll, Alan 188.83 217.30
Taylor 150 4/11/10 RV Gold RV-8 Ogden, Deene 188.69 217.14
Taylor 100 2009 3/16/09 RV Blue RV-8 Christman, Dave 188.33 216.73
Sulphur Springs 130 7/18/10 RV Blue RV-8 Rovey, Jason 188.12 216.48
West Texas 100 6/6/10 RV Gold RV-8 Huft, John 187.99 216.33
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Schryver, Fred 187.49 215.76
Rocket 100, 2010 11/20/10 RV Blue RV-8 Grover, David 187.39 215.65
Texoma 100, 2011 4/16/11 RV Blue RV-8 Taylor, Craig 186.87 214.97
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Rovey, Jason 186.47 214.45
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Taylor, Craig 186.31 214.41
AirVenture Cup (Matoon) 2011 7/24/11 RV Gold RV-8 Ring, R. Damon 186.05 214.11
Grace Flight 2010 10/2/10 RV Blue RV-8 Carroll, Alan 185.70 213.69
Grace Flight 2010 10/2/10 RV Blue RV-8 Rovey, Jason 185.32 213.25
Grace Flight 2010 10/2/10 RV Blue RV-8 Chrisman, Dave 184.94 212.81
Grace Flight 2010 10/2/10 RV Gold RV-8 Ogden, Deene 184.86 212.73
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Jordan, Scott 184.85 212.72
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Schryver, Fred 184.85 212.72
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Taylor, Craig 183.31 210.81
AirVenture Cup 2010 7/26/10 RV Blue RV-8 Carroll, Alan 182.98 210.57
Colorado 150, 2008 6/29/08 RV Blue RV-8 Carroll, Alan 181.34 208.68
2011 West Tesas 100 6/18/11 RV Blue RV-8 Krebaum, Ken 180.69 207.93
Texoma 100 2009 5/31/09 RV Blue RV-8 Tuckey, Pat* 180.59 207.82
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Ross, Jon 180.44 207.65
AirVenture Cup 2009 7/27/09 Sport FX RV-8 Martin, Dick 180.44 207.65
West Texas 100 6/6/10 RV Blue RV-8 Rovey, Jason 179.91 207.04
Rocket 100, 2010 11/20/10 RV Blue RV-8 Hopkins, Dan 179.74 206.84
Pagosa Springs 100 2009 9/27/09 RV Blue RV-8 McCann, Jim 179.42 206.33
Big Sky Air Race 7/9/11 RV Blue RV-8 Malott, Paul 179.11 206.12
Texoma 100, 2011 4/16/11 RV Blue RV-8 Krebaum, Ken 178.69 205.55
Rocket 100, 2010 11/20/10 RV Red RV-8 Jones, Bryan 177.27 204.00
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Crosley, Eber 177.21 203.79
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Carroll, Alan 176.87 203.54
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Krebaum, Ken 176.41 203.01
Top of the Chesapeake 7/11/10 RV Blue RV-8 Robertson, Gordon 176.38 202.97
BCAF 2011 4/30/11 RV Gold RV-8 Hajek, Jerry 175.16 201.57
Taylor 150, 2011 4/2/11 RV Blue RV-8 Holladay, Chad 174.21 200.48
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Greenberg, Redge 173.42 199.43
Texoma 100 4/25/10 RV Blue RV-8 Stanton, Danny 173.10 199.07
Taylor 100 2007 5/20/07 RV Red RV-8 Jones, Bryan 169.45 195.00
Taylor 150, 2011 4/2/11 RV Gold RV-8 Hajek, Jerry 161.20 185.51
Taylor 150 4/11/10 RV Blue RV-8 Hopkins, Dan 156.48 180.07
Memorial 130, Terrell, TX 5/28/11 RV Gold RV-8A Sutterfield, Stan 190.82 219.59
Texoma 100, 2011 4/16/11 RV Gold RV-8A Sutterfield, Stan 188.88 217.28
Memphis 100 2008 10/19/08 RV Blue RV-8A Labarreare, Chuck 172.70 198.74
This is not a perfect fit to your question but it does provide a lot of historical max speed data on RV-8s without altitude restrictions. The RV Red class has 320 cu. in. RV Blue Class is limited to 360 cu. in. and the RV Gold can have 390 cu. in. You will note that John Huft flew in the Blue and Gold Classes. It is the same airplane and engine (IO 360), he just felt sorry for the rest of us Blues and decided to take on the 390s in the Gold Class.
Bob Axsom
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Huft, John 217.17 249.91
Rocket 100, 2010 11/20/10 RV Gold RV-8 Huft, John 205.39 236.36
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Huft, John 204.56 235.40
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Ross, Jon 202.59 233.14
AirVenture Cup 2010 7/26/10 RV Gold RV-8 Huft, John 201.97 232.42
Grace Flight 2009 10/4/09 RV Blue RV-8 Huft, John 201.71 232.12
Taylor 100 2009 3/16/09 RV Blue RV-8 Huft, John 201.29 231.64
AirVenture Cup 2008 7/27/08 Sport FX RV-8 Martin, Dick 202.28 231.63
Pagosa Springs 2010 9/26/10 RV Gold RV-8 Huft, John 200.93 231.07
Colorado 150, 2008 6/29/08 RV Blue RV-8 Huft, John 199.27 229.31
Pagosa Springs 100 2009 9/27/09 RV Blue RV-8 Huft, John 199.38 229.29
Rocket 100 2008 11/23/08 RV Blue RV-8 Huft, John 197.43 227.20
Texoma 100 4/25/10 RV Gold RV-8 Ogden, Deene 197.15 226.72
Rocket 100, 2010 11/20/10 RV Gold RV-8 Ogden, Deene 196.89 226.58
Memorial 130, Terrell, TX 5/28/11 RV Gold RV-8 Hajek, Jerry 196.00 225.55
Lone Star Air Rally 5/14/11 RV Gold RV-8 Hajek, Jerry 195.77 225.29
Rocket 100, 2010 11/20/10 RV Blue RV-8 Rovey, Jason 195.44 224.90
Rocket 100, 2007 11/18/07 RV Blue RV-8 Huft, John 194.78 224.15
Sulphur Springs 130 7/18/10 RV Gold RV-8 Ogden, Deene 194.59 223.94
Rocket 100, 2010 11/20/10 RV Gold RV-8 Hajek, Jerry 194.43 223.74
AirVenture Cup 2007 7/23/07 Sport FX RV-8 Martin, Dick 194.36 223.67
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Carroll, Alan 193.76 222.97
Tennessee Valley Air Race 2010 10/30/10 RV Blue RV-8 Rovey, Jason 193.50 222.72
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Rovey, Jason 193.53 222.72
Texoma 100, 2008 4/20/08 RV Blue RV-8 Christman, Dave 192.88 222.00
Tennessee Valley Air Race 2010 10/30/10 RV Blue RV-8 Carroll, Alan 192.07 221.07
Texoma 100, 2011 4/16/11 RV Gold RV-8 Hajek, Jerry 192.17 221.07
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Ross, Jon 192.04 221.00
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Carroll, Alan 191.77 220.68
Big Sky Air Race 7/9/11 RV Blue RV-8 Rovey, Jason 191.31 220.15
Indy Air Race 8/13/11 RV Blue RV-8 Carroll, Alan 191.29 220.14
2011 West Tesas 100 6/18/11 RV Blue RV-8 Rovey, Jason 190.36 219.07
AirVenture Cup (TH) 2011 7/25/11 RV Gold RV-8 Ring, R. Damon 190.31 219.00
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Huft, John 189.13 217.69
AirVenture Cup 2010 7/26/10 RV Blue RV-8 Ross, Jon 189.01 217.51
Taylor 100 2009 3/16/09 RV Blue RV-8 Carroll, Alan 188.96 217.46
Great Canadian Air Rally 2010 8/22/10 RV Blue RV-8 Carroll, Alan 188.83 217.30
Taylor 150 4/11/10 RV Gold RV-8 Ogden, Deene 188.69 217.14
Taylor 100 2009 3/16/09 RV Blue RV-8 Christman, Dave 188.33 216.73
Sulphur Springs 130 7/18/10 RV Blue RV-8 Rovey, Jason 188.12 216.48
West Texas 100 6/6/10 RV Gold RV-8 Huft, John 187.99 216.33
AirVenture Cup 2008 7/27/08 RV Blue RV-8 Schryver, Fred 187.49 215.76
Rocket 100, 2010 11/20/10 RV Blue RV-8 Grover, David 187.39 215.65
Texoma 100, 2011 4/16/11 RV Blue RV-8 Taylor, Craig 186.87 214.97
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Rovey, Jason 186.47 214.45
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Taylor, Craig 186.31 214.41
AirVenture Cup (Matoon) 2011 7/24/11 RV Gold RV-8 Ring, R. Damon 186.05 214.11
Grace Flight 2010 10/2/10 RV Blue RV-8 Carroll, Alan 185.70 213.69
Grace Flight 2010 10/2/10 RV Blue RV-8 Rovey, Jason 185.32 213.25
Grace Flight 2010 10/2/10 RV Blue RV-8 Chrisman, Dave 184.94 212.81
Grace Flight 2010 10/2/10 RV Gold RV-8 Ogden, Deene 184.86 212.73
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Jordan, Scott 184.85 212.72
AirVenture Cup 2007 7/23/07 RV Blue RV-8 Schryver, Fred 184.85 212.72
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Taylor, Craig 183.31 210.81
AirVenture Cup 2010 7/26/10 RV Blue RV-8 Carroll, Alan 182.98 210.57
Colorado 150, 2008 6/29/08 RV Blue RV-8 Carroll, Alan 181.34 208.68
2011 West Tesas 100 6/18/11 RV Blue RV-8 Krebaum, Ken 180.69 207.93
Texoma 100 2009 5/31/09 RV Blue RV-8 Tuckey, Pat* 180.59 207.82
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Ross, Jon 180.44 207.65
AirVenture Cup 2009 7/27/09 Sport FX RV-8 Martin, Dick 180.44 207.65
West Texas 100 6/6/10 RV Blue RV-8 Rovey, Jason 179.91 207.04
Rocket 100, 2010 11/20/10 RV Blue RV-8 Hopkins, Dan 179.74 206.84
Pagosa Springs 100 2009 9/27/09 RV Blue RV-8 McCann, Jim 179.42 206.33
Big Sky Air Race 7/9/11 RV Blue RV-8 Malott, Paul 179.11 206.12
Texoma 100, 2011 4/16/11 RV Blue RV-8 Krebaum, Ken 178.69 205.55
Rocket 100, 2010 11/20/10 RV Red RV-8 Jones, Bryan 177.27 204.00
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Crosley, Eber 177.21 203.79
AirVenture Cup 2009 7/27/09 RV Blue RV-8 Carroll, Alan 176.87 203.54
Memorial 130, Terrell, TX 5/28/11 RV Blue RV-8 Krebaum, Ken 176.41 203.01
Top of the Chesapeake 7/11/10 RV Blue RV-8 Robertson, Gordon 176.38 202.97
BCAF 2011 4/30/11 RV Gold RV-8 Hajek, Jerry 175.16 201.57
Taylor 150, 2011 4/2/11 RV Blue RV-8 Holladay, Chad 174.21 200.48
Pagosa Springs 2010 9/26/10 RV Blue RV-8 Greenberg, Redge 173.42 199.43
Texoma 100 4/25/10 RV Blue RV-8 Stanton, Danny 173.10 199.07
Taylor 100 2007 5/20/07 RV Red RV-8 Jones, Bryan 169.45 195.00
Taylor 150, 2011 4/2/11 RV Gold RV-8 Hajek, Jerry 161.20 185.51
Taylor 150 4/11/10 RV Blue RV-8 Hopkins, Dan 156.48 180.07
Memorial 130, Terrell, TX 5/28/11 RV Gold RV-8A Sutterfield, Stan 190.82 219.59
Texoma 100, 2011 4/16/11 RV Gold RV-8A Sutterfield, Stan 188.88 217.28
Memphis 100 2008 10/19/08 RV Blue RV-8A Labarreare, Chuck 172.70 198.74
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dedgemon
Well Known Member
humptybump
Well Known Member
My RV-8 thinks it's a 4
Just so there is a different sounding voice in the crowd ...
RV-8 with carburated 150hp O-320 and AD fixed pitch wood prop ...
My recent tests gave me 158-160kts 8000' ROP at 7.4-7.6 gph
(most of x-country flights are at 9.5k-11.5k and I get 152-155kts tas at 7.2gph)
Just so there is a different sounding voice in the crowd ...
RV-8 with carburated 150hp O-320 and AD fixed pitch wood prop ...
My recent tests gave me 158-160kts 8000' ROP at 7.4-7.6 gph
(most of x-country flights are at 9.5k-11.5k and I get 152-155kts tas at 7.2gph)
Interesting thread. Flew awhile today and wanted to see how my ship measured up.
IO-360 A1B6D
3 blade Mccauley
Sam James Cowl and Plenum
8000' msl
22.5" mp
2500 rpm
182.48 knots true
My machine is turbo normalized, with the third lever pushed in slightly to pull 25 squared:
25"mph
2500 rpm
190.3 knots true
10.2 gph/186 deg oil/340 deg cht/1300 egt
FWIW,
Mark
IO-360 A1B6D
3 blade Mccauley
Sam James Cowl and Plenum
8000' msl
22.5" mp
2500 rpm
182.48 knots true
My machine is turbo normalized, with the third lever pushed in slightly to pull 25 squared:
25"mph
2500 rpm
190.3 knots true
10.2 gph/186 deg oil/340 deg cht/1300 egt
FWIW,
Mark
