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  #1  
Old 01-20-2015, 05:48 AM
carlosvinicius carlosvinicius is offline
 
Join Date: Aug 2012
Location: Goiânia, Goiás, Brazil
Posts: 6
Default BEST Cruise Performance RV-10

Hi everybody.
My name is Carlos Vinícius and I just finish my RV10.
Could you all help me?
What is the best configuration between RPM and manifold pressure for the best cruise performance in my RV-10?
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  #2  
Old 01-20-2015, 08:42 AM
JDanno JDanno is offline
 
Join Date: Apr 2008
Location: Tennessee
Posts: 440
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Best I've seen in the two -10s I'm familiar with is 21" mp, 2100 rpm and 12 gals/hour at 160 knots.
Bumped up to 24 squared gives more speed at a greater fuel flow
Compared to a C-182 it's same fuel flow and 40 kts. Faster for instance
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  #3  
Old 01-20-2015, 09:07 AM
douglassmt douglassmt is offline
 
Join Date: Nov 2008
Location: Missoula, MT
Posts: 673
Default Mine

Assuming you have the IO-540 with standard compression, running 100LL fuel...

My cruise setting at altitude (>8500 ft) is wide open throttle, 2360 rpm. At lower altitudes I run 23x2360. When properly operated lean of peak I get 170 ktas at 10.5 gph. If you aren't familiar with LOP, I can run rich of peak at about 12.5 gph, a little faster but not much. But I never do.

My$0.02
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RV-10 N242BD
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  #4  
Old 01-20-2015, 09:13 AM
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Mike S Mike S is online now
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
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Default

Altitude is a big factor here, you have not mentioned how high you are flying at.

Here is a shot of our 10, flying at 13,500'------wide open throttle, fuel 9.5 gph, 2300 rpm. Ground speed was 212 mph with a bit of a tailwind.

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VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

Phase 1 done, 2/4/2011

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  #5  
Old 01-20-2015, 09:21 AM
carlosvinicius carlosvinicius is offline
 
Join Date: Aug 2012
Location: Goiânia, Goiás, Brazil
Posts: 6
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I usually fly at 075 or 085
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  #6  
Old 01-20-2015, 09:25 AM
sergioam2009 sergioam2009 is offline
 
Join Date: Jan 2013
Location: Brasilia, DF Brazil
Posts: 42
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Do we have 100LL in Brazil? I don't think so... Our "blue" avgas is 100/130... so I heard.
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  #7  
Old 01-20-2015, 09:28 AM
carlosvinicius carlosvinicius is offline
 
Join Date: Aug 2012
Location: Goiânia, Goiás, Brazil
Posts: 6
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O use AvGas 100
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  #8  
Old 01-23-2015, 10:19 AM
ReidVaitor ReidVaitor is offline
 
Join Date: Jun 2006
Location: SoCal
Posts: 127
Default Best cruise Performance in -10

Carlos;
I have my injectors matched to within .3 from richest to leanest, I always fly, no matter what altitude at 10GPH avg and 158KTS TAS. I have a Dynon Skyview that tells me I get about 16NM per Gallon. I know one -10 that cruises at 22MP/2100RPM, my engine does not like this configuration at all, but does at 2300 and above. Unless you have a very nice LOP spread you'll find that you will need to find your engines happy spot. If you run ROP you will get better speed but also about 12-14GPH.In the end, fly the plane at 2200, than 2300, than 2400, lean out to roughness and see where you can get to be your smoothest RPM and MAP setup.
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  #9  
Old 01-23-2015, 12:55 PM
woxofswa woxofswa is offline
 
Join Date: Sep 2007
Location: Mesa Arizona
Posts: 505
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What I have found repeatedly is that even though LOP shows a lower GPH, after stabilization, the MPG is about the same as ROP which is faster, smoother, and cooler for the lower cowl/firewall area. The engine runs okay at LOP, but much sweeter at ROP.

Maybe I'll explore again if/when the "few weeks away" 6 banger Pmag emerges, but I don't bother with LOP anymore.
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  #10  
Old 01-23-2015, 01:48 PM
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Aerosport1 Aerosport1 is offline
 
Join Date: May 2007
Location: Canal Winchester, Ohio
Posts: 375
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After 5 yrs of flying
ROP 9000ft 2350 rpm, WOT 12.5 GPH 171kts TAS (depending on how loaded)
LOP 9000ft 2400 rpm, WOT 10.8GPH 164KTS TAS

Never have I seen over 160kts TAS LOP under 10GPH once settled in and no wind

I find these to be very consistent with other people
standard engine. I have an Aero Sport built engine
Stock Van setup

Geoff
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