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02-28-2016, 05:32 PM
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Join Date: Sep 2012
Location: Sandwich, MA
Posts: 14
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Empennage RV-7 vs. RV-9
Hi - Been lurking around for awhile, and getting closer to pulling trigger on a build.
Two questions that I'd hope the forum could help address:
1. Are the Empennage Kits for the RV7/A and RV9/A identical? Haven't decided whether I want to build 7 or 9. I would like to delay that decision till I've taken a ride in both - -but start the Empennage building if they were the same.
2. Can anyone provide general dimensions for the Empennage? Looking to build it in my basement -- but I'd need to get it out of a hatchway.
Thanks in advance for your thoughts!
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02-28-2016, 05:39 PM
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Join Date: May 2005
Location: Savannah, GA
Posts: 1,301
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No - the -9 has a bigger wing and needs a bigger horizontal tail. I think the verticals are the same size.
The two planes have the same fuselage, but are different. The -9/A is easier to fly and the factory folks consider it the best for cross country flights. The -7/A is aerobatic, more responsive/less stable, can take bigger engines, and is faster.
Get some rides if you can and make your choice!
Ed
__________________
RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
ATP CFII PhD, so I have no excuses when I screw up
2020 dues slightly overpaid
Retired - "They used to pay me to be good, now I'm good for nothing."
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02-28-2016, 05:41 PM
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Join Date: Sep 2013
Location: Buda, TX
Posts: 56
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The tail kits are very different for the two planes. The RV-7 has a smaller and tapered horizontal stabilizer. The RV-9 has a much larger and squared off horizontal stabilizer.
RV-7:
RV-9:
And welcome to VAF! 
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02-28-2016, 07:11 PM
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Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
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definitely need some rides!
one of many data points.
the fuselage of the 7 and 9 are the same DIMENSION, the 7 is beefed up internally to handle larger engines & aerobatic loads, ditto the tail group.
nothing wrong with buying a used tail of almost anything, learn how to rivet and fix rivets, then sell it if you change your mission target.
enjoy your new venture!!!
P.S. love my -9a, if you fly infrequently or aren't Joe test pilot, it's very forgiving. Also a good IFR platform they say, just don't go upside down, on purpose! 
__________________
Perry Y.
RV-9a - SOLD!....
Lake Country, BC
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02-28-2016, 08:13 PM
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Join Date: May 2005
Location: X35 - Ocala, FL
Posts: 3,679
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Quote:
Originally Posted by flyboy1963
...just don't go upside down, on purpose! 
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Well, at least don't stay upside down very long. I have it on good authority that the -9 does an excellent aileron roll. Even better than the -10. Loops nicely too. Again, all on good authority, but...um...not necessarily personal experience.
The -9 is an excellent stable plane for comfortable cross-country flying.
__________________
Jesse Saint
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02-29-2016, 06:30 PM
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Join Date: Sep 2012
Location: Sandwich, MA
Posts: 14
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Thanks to all for the welcome and the information!
This forum looks to be an absolutely AWESOME resource and that there is a lifetime of learning here!!
I plan to pull the trigger and start building in the fall, but meanwhile will be looking to try a couple out to decide 7 vs. 9 and learn all I can from this forum..
Thanks -- Jim
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03-26-2016, 10:17 PM
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Join Date: Jan 2005
Location: KPYM
Posts: 2,686
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With an RV7 you will get waaay hotter chicks than in a 9!
 CJ
__________________
RV-7 Flying - 1,200 Hours in 5 Years!
The experiment works!
TMX-IO-360, G3i ignition & G3X with VP-X
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03-27-2016, 06:57 AM
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Join Date: Oct 2012
Location: Clearwater, FL KCLW
Posts: 1,281
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Quote:
Originally Posted by Captain_John
With an RV7 you will get waaay hotter chicks than in a 9!
 CJ
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My wife begs to differ (and of course, I have to agree with her!)
Chris
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Chris Johnson
RV-9A - Done(ish) 4/5/16! Flying 4/7/16
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03-27-2016, 07:44 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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Quote:
Originally Posted by Ed_Wischmeyer
No - the -9 has a bigger wing and needs a bigger horizontal tail. I think the verticals are the same size.
The two planes have the same fuselage, but are different. The -9/A is easier to fly and the factory folks consider it the best for cross country flights. The -7/A is aerobatic, more responsive/less stable, can take bigger engines, and is faster.
*Only below 10k, based on discussion with factory, the longer wing pays (literally) at altitude. *
Get some rides if you can and make your choice!
Ed
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Definitely get some rides, and decide on your mission, then, look at the specs. I once thought the 9 to just be a cheaper version of the 7, but not so, it has the altitude cruise advantage over the 7.
I am building a 7, so take that with a grain . . .
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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