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08-04-2009, 08:54 AM
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Join Date: Jan 2009
Location: Charlottesville
Posts: 20
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Model change mid build
I went back and forth between the -7 and the -8 before finally deciding on a -7. I am enjoying the process of building the -7, but find myself always wishing I had started on a -8. The literature I had at the time, mentioned that the -7 was completely matched hole and the -8 fuselage only had prepunched skins. Looking at Van's website a few days ago, I noticed the entire -8 kit is matched hole. This was a major consideration for me in deciding to go with the -7, so I am giving serious thought to changing over to the -8. Also, my plan to build an IFR plane has changed as well, so the limited panel space is not an issue.
I am about 40 hours into the -7 empennage, so if I am going to make a change, the sooner the better. My big worry is that if I change to the -8, I will wish I was building a -7. Have any of you changed models after starting on another one? Did it work out well for you?
Ryan
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08-04-2009, 09:21 AM
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Join Date: Nov 2006
Location: Waco, Texas
Posts: 1,658
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If all you've purchased is the emp kit, then you're really not into the meat of the money. The cost to change your mind is really not much.
If you really want the 8, I say buy the -8 kit too and put the -7 parts on the shelf. You can come back and finish it later. It won't cost you much to hang on to it and it'll give you something to work on if you ever get caught waiting on parts for the 8 or waiting on money for the 8.
I've been watching for an affordable 7 tail kit, just to put on the shelf while I work on the 10.
Phil
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08-04-2009, 11:26 AM
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Join Date: Jan 2005
Location: SC
Posts: 12,887
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Now is a good time to change.
I started on a -6 tail kit and when Van's came out with the -9 tail dragger, I stuffed the kit under my workbench and ordered the -9 tail.
Later I sold the -6 tail kit and never looked back.
Build what YOU want and equip the way YOU want, not the way others want you to built and equip it.
__________________
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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08-04-2009, 12:16 PM
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Join Date: Jan 2005
Location: Shorewood, WI (Milwaukee area)
Posts: 1,066
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If you decide you want an IFR airplane the -8 panel has plenty of room for full IFR instrumentation.
__________________
Bill Dicus
Shorewood (Milwaukee) Wisconsin
RV-8 N9669D Flying 12/4/14!
Flying Pitts S-2A, Piper Lance
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08-04-2009, 12:34 PM
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Join Date: Sep 2007
Location: WA
Posts: 988
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hardly mid-build at 40 hours into the empennage...
the seating configuration is so completely different between the 7 and 8 you should embrace whatever you want and move on. at this point your lost cost and time is pretty minimal...
__________________
Stephen
RV7 powered by a lycoming thunderbolt IO-390
turning a whirlwind HRT prop
with more hours flying than building... 2,430 on the hobbs!
ORCA Flight
Race 771
margarita!
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08-04-2009, 12:41 PM
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Join Date: Jan 2006
Posts: 934
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Part Swapping...
Just a question, but can the -7 horizontal stab, elevators and vertical stab be used on the -8? I know the -8 has the small rudder so the VS tip needs to be changed, but other than the rudder, are they compatible?
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08-04-2009, 01:46 PM
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Join Date: Feb 2007
Location: Stow MA
Posts: 174
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I'm in the same boat
I find myself in a similar situation, except that I've finished my -7 empannage and am almost done with one wing. Still, I'm thinking about shelving the -7 and building the -12. I figure that even with my sunk time and money, I'll still be flying sooner and cheaper with the -12. Then I can work on the -7 while I'm flying and building hours with the -12, and maybe down the road sell the 12 to get an engine for the -7.
Has anyone else shelved an RV project to start the -12?
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08-04-2009, 02:10 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,561
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check which parts are shared
Quote:
Originally Posted by Jim P
Just a question, but can the -7 horizontal stab, elevators and vertical stab be used on the -8? I know the -8 has the small rudder so the VS tip needs to be changed, but other than the rudder, are they compatible?
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Many of the empennage parts have the same part numbers. You should check with Vans to be sure, but I bet some or most of what you have built will work on an -8.
My wife wanted a -7, but truthfully won't fly with me much either way. I built an -8 because its the plane I wanted. She'll still ride along. I told her if she learns how to fly, we can build a -7 together for her. We'll see.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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08-04-2009, 06:47 PM
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Join Date: Jan 2005
Location: Santa Rosa, CA
Posts: 216
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I did it.
Ryan,
I started off building a 7 empennage because I was thinking more about potential passengers than about what I REALLY wanted to build and fly. After I completed the empennage I went for a ride in an 8 and knew I had to have one. The only thing I had to rebuild was my horizontal stabilizer. I drilled all the rivets out and was able to save my rear spar assembly. Everything else on the HS had to be done again. It wasn't bad, and it helped me get pretty good at drilling out flush rivets. My 8 just moved out of the garage today and went to the paint shop. In about a week it will be up to the hangar for final assembly.
Good luck with your choice!
__________________
Craig Schwartz
RV-8 (Flying!), IO-360B1PC2 (180 hp, 1 P-Mag, 1 Slick Mag), Whirlwind 200RV, AF-3500, G496, Digiflight II, Classic Aero Sportsman Ultraleather Seats
N868RV
Santa Rosa, CA
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08-04-2009, 07:09 PM
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Join Date: Jan 2005
Location: Mtns of N.E. Georgia
Posts: 1,322
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Change
Ryan:
A wise old man (me!) once said " Build the airplane that you want to see when you open the hangar door.
Worked for me!!!!!!!!! I fly an 8! 
__________________
LAUS DEO
Mannan J.Thomason, MSGT. USAF (RET)
VAF788
"Bucket List" checkoff in progress!
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