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10-06-2013, 08:54 PM
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Join Date: Jan 2005
Posts: 3,642
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Quick help needed-fuel flow 0-320 at takeoff
Am away from home with no access to charts. Can someone tell me what fuel flow I should see at takeoff for a 160-hp O-320-D2a at 1700msl and 60f oat? Thanks for any help.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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10-06-2013, 09:25 PM
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Join Date: Mar 2009
Location: Sydney, Australia
Posts: 617
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If I am reading the charts correctly you should be seeing about 12gallons per hour.
Cheers
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Eddie Seve
Sydney Australia
First Flight 16th July 2012
RV-7 Phase 2, 30 Oct 2012
1100 hrs Feb 2020
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10-06-2013, 11:02 PM
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Join Date: Dec 2005
Location: Mahomet, Illinois
Posts: 2,195
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Agree ...
My GRT shows somewhere slightly above 12gph under those conditions.
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Terry Ruprecht
RV-9A Tip-up; IO-320 D2A
S. James cowl/plenum
(Dues paid thru Nov '18)
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10-07-2013, 06:33 AM
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Join Date: Sep 2005
Location: Maple Grove, MN
Posts: 2,331
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12 seems too low for WOT, full rich, those conditions. There are threads discussing this at length on these forums, no time right now to search...
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Alex Peterson
RV6A N66AP 1700+ hours
KADC, Wadena, MN
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10-07-2013, 06:38 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Fuel flow will follow rpm, so it depends on prop pitch.
Higher pitch = lower rpm = lower the fuel flow.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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10-07-2013, 11:38 AM
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Join Date: Dec 2006
Location: Portland, OR
Posts: 827
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IO-320 D3G fuel flow.
I see 16-17 GPH. WOT, Sea level, Boost pp ON, 2680 RPM. EGT's level off around 1330.
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Long-EZ built 1985 -> Sold 2007
RV-9A; N539RV First Flight: 7/2010
RV-8A N468DL 40 hr Flight Test Program
Building Log: www.mykitlog.com/n539rv
APRS Tracking: aprs.fi/n539rv
2017 Paid 
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10-07-2013, 02:12 PM
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Join Date: Jan 2005
Posts: 3,642
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Thanks. I'm seeing 11.8 gph average on takeoff during my first 800 feet of climb when starting at 1700 msl, and 12.5 gph for my first 800 feet of climb when starting at 700 msl (2 typical airports I fly out of, separated by 1000' o elevation). It varies slightly with OAT, but those are the averages. In other threads many of you have helped me track down possibilities for high temps, but I'm starting to default to too little fuel.
Anyway, thanks for the help while I'm away.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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