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  #11  
Old 02-20-2017, 08:04 AM
airguy's Avatar
airguy airguy is offline
 
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I did a climb to 17,500 yesterday to check out my oxygen system after working on the regulator (yes, with a fingertip blood sat checker), I didn't specifically watch the time-to-climb but I was up and back down again in 36 minutes. My home strip is 2700' and I climbed at 1000/min until 10,000', then climbed at 95 knots after that, I was still climbing at 500/min when the autopilot leveled at 17,500.

IO360, Whirlwind prop.
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Greg Niehues - VAF 2017 dues paid
Garden City, TX
N16GN flying! http://websites.expercraft.com/airguy/
Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
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  #12  
Old 02-21-2017, 10:09 AM
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Steve Melton Steve Melton is offline
 
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those are good numbers.
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Cincinnati, OH
RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.
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  #13  
Old 02-21-2017, 06:25 PM
PilotjohnS PilotjohnS is offline
 
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Quote:
Originally Posted by Steve Melton View Post
those are good numbers.
Steve, your configuration is going to be closer to mine. What do you plan for cruise and what climb rate and speed do you use for everyday missions. Lastly any high altitude speeds and fuel flow?
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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for thier use.

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RV9A- Status: tail feathers done less tips
Wings started
www.pilotjohnsrv9.blogspot.com
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  #14  
Old 02-22-2017, 07:12 PM
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Steve Melton Steve Melton is offline
 
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Quote:
Originally Posted by PilotjohnS View Post
Steve, your configuration is going to be closer to mine. What do you plan for cruise and what climb rate and speed do you use for everyday missions. Lastly any high altitude speeds and fuel flow?
I have become slower after painting or I'm loafing the engine more or maybe it's the dreaded paint weight. I plan at 140 kts cruise, normal climb =700 fpm. Fast climb on takeoff at 90kt >2000 fpm when OAT < 3C. On the last flight from Kansas to Cincy at 11.5K my TAS was 139 at 2200 RPM burning 5.7 gph, OAT =1C. On that flight I had a great tailwind (like 50 kts) and burned 21 gal for 600 nm.
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Steve Melton
Cincinnati, OH
RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.

Last edited by Steve Melton : 02-22-2017 at 07:20 PM.
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  #15  
Old 02-22-2017, 07:24 PM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by Steve Melton View Post
I have become slower after painting or I'm loafing the engine more. I plan at 140 kts and normal climb =700 fpm. Fast climb on takeoff at 90kt >2000 fpm when OAT < 3C. On the last flight from Kansas to Cincy at 11.5K my TAS was 139 at 2200 RPM burning 5.7 gph, OAT =1C.
You must be down around 50% power for those speeds? Those numbers exactly match what I saw when I had the O-290 in my -9, only my RPM would be up on the 2600 RPM redline (fixed pitch prop). All that worked out to around 60 - 65% power for that little engine that could.

With the O-360 I typically cruise it at 50 to 55% power which works out to 150 to 155 knots and 7 GPH. Up in the teens, it can burn a much lower fuel numbers while keeping the speed up there.
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RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html

Last edited by N941WR : 02-22-2017 at 07:53 PM.
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  #16  
Old 02-22-2017, 07:32 PM
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Steve Melton Steve Melton is offline
 
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Quote:
Originally Posted by N941WR View Post
You must be down around 50% power for those speeds? Those numbers exactly match what I saw when I had the O-290 in my -9, only my RPM would be up on the 2600 RPM redline (fixed pitch prop).

With the O-360 I typically cruise it at 50 to 55% power which works out to 150 to 155 knots and 7 GPH. Up in the teens, it can burn a much lower fuel numbers while keeping the speed up there.
11.5K my TAS was 139 at 2200 RPM burning 5.7 gph, OAT =1C

Calculated by my spreadsheet, to memory of MP =20 Hg = 54% power.

And... I don't drive as fast as I used to. Maybe there's a correlation.
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Steve Melton
Cincinnati, OH
RV-9A, Superior O-320, roller lifters, 160HP, WW 200RV, oil pressure = 65 psi, EGT = 1300F, flight hours = 500+ for all

Simplicity is the art in design.

Last edited by Steve Melton : 02-22-2017 at 07:48 PM.
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  #17  
Old 02-23-2017, 07:33 AM
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airguy airguy is offline
 
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Quote:
Originally Posted by N941WR View Post
With the O-360 I typically cruise it at 50 to 55% power which works out to 150 to 155 knots and 7 GPH. Up in the teens, it can burn a much lower fuel numbers while keeping the speed up there.
I like to cruise high, in the midteens usually, and typically I will see the same TAS of 150-155 on fuel burn of 6.4-6.6.
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Greg Niehues - VAF 2017 dues paid
Garden City, TX
N16GN flying! http://websites.expercraft.com/airguy/
Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
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  #18  
Old 02-23-2017, 08:28 AM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by airguy View Post
I like to cruise high, in the midteens usually, and typically I will see the same TAS of 150-155 on fuel burn of 6.4-6.6.
Some time back I posted this.

159 knots @ 5.2 GPH. Not bad at all! I love the -9 wing!
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Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
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  #19  
Old 02-23-2017, 09:44 AM
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airguy airguy is offline
 
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Quote:
Originally Posted by N941WR View Post
Some time back I posted this.

159 knots @ 5.2 GPH. Not bad at all! I love the -9 wing!
Ok, you might win bragging rights on that one for now - but just let me get my injector orifices (orificii?) dialed in and we'll play a little...

In any case, I get asked all the time what kind of efficiency I get and I normally respond with "I flight plan 160 knots true at 8 gph." More than once I've been called a liar straight to my face. I just shrug my shoulders and smile, it's not my job to make believers out of the spam-canners.
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Greg Niehues - VAF 2017 dues paid
Garden City, TX
N16GN flying! http://websites.expercraft.com/airguy/
Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
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  #20  
Old 02-23-2017, 09:45 AM
PilotjohnS PilotjohnS is offline
 
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Thanks for the data; great stuff
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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for thier use.

Extra dues paid 2017, worth every penny

RV9A- Status: tail feathers done less tips
Wings started
www.pilotjohnsrv9.blogspot.com

Last edited by PilotjohnS : 02-26-2017 at 12:25 AM.
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