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09-01-2018, 11:39 AM
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Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,544
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A RV8 is a nice looking airplane until you park it beside a Rocket.
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Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
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09-01-2018, 12:52 PM
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Join Date: Nov 2014
Location: Clovis, NM
Posts: 139
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Thank you for the numbers analysis. I agree, getting an "accurate" speed assessment is the most difficult part when comparing aircraft.
I know this next question is opening a can of worms, but is there a appreciable speed difference between the F1 and the H2 rockets? Also, I know the F1 is a kit on it's own, but is the $10k difference worth the extra cost?
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Matt
RV-8A Owner
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09-01-2018, 01:02 PM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,642
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Speed between the F-1 and HRII is based primarily on attention to the build. Again drawing from the "real world", the group of 6 Rockets that I run with (3 are F-1's and 3 are HRII's), 1 particular F-1 is the fastest, followed by a HRII a close second. Among the rest of us there's no practical difference. Some day if we can ever get all 6 of us airborne together we will do a balls out race to see who has bragging rights.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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09-01-2018, 01:36 PM
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Join Date: Jul 2007
Location: Madison, Wisconsin
Posts: 778
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Quote:
Originally Posted by Toobuilder
Data from my stable:
RV-8 165 KTAS @ 8.5 GPH (19.4 MPG)
Rocket 202 KTAS @ 11 GPH (18.3 MPG)
Though I dont go flat out very often, I have done some limited testing and the results are as follows:
Rv-8 178KTAS @ 17.5 GPH (10 MPG)
Rocket 220 KTAS @ 25 GPH (8.8 MPG)
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Interesting comparison, thanks. I'm curious, what are the altitudes for these numbers?
I don't have anything to compare to the Rocket, but my RV-8 does more like 188 KTAS down low and wide open on a warm day, on a couple of GPH less (180 hp, carb, CS). I know others that beat me regularly in races. Anecdotal report!
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Alan Carroll
RV-8 N12AC
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09-01-2018, 05:46 PM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,642
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The lower speeds are my typical "economy" cruise and ~9000 MSL. Higher numbers were SL.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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09-01-2018, 09:13 PM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,562
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At RV speeds a rocket will burn less fuel. Jim Winings and I used to fly a lot of cross country trips together. When we would stop and fill up he'd always be a few tenths of a gallon less than I would in my RV6.
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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09-02-2018, 08:58 AM
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Join Date: Oct 2009
Location: Victoria, BC, Canada
Posts: 3,926
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Quote:
Originally Posted by Toobuilder
Some day if we can ever get all 6 of us airborne together we will do a balls out race to see who has bragging rights.
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Won't that just add drag? :P
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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09-02-2018, 09:10 AM
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Join Date: Nov 2014
Location: Clovis, NM
Posts: 139
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Quote:
Originally Posted by Snowflake
Won't that just add drag? :P
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Now that is funny! 
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Matt
RV-8A Owner
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09-02-2018, 09:23 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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Quote:
Originally Posted by Snowflake
Won't that just add drag? :P
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But sure feels good on those hot summer days 
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Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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09-02-2018, 01:17 PM
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Join Date: Sep 2008
Location: Christchurch, New Zealand
Posts: 187
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Quote:
Originally Posted by Mike S
But sure feels good on those hot summer days |
Not if you go too fast and get flutter. |
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