Dale Strand
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new here an thanks in advance, Question : are 7 and 8 wings interchangable ?
Van's Air Force
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Are 7&8 wings interchangeable?
- Thread starter Dale Strand
- Start date
I don't know about the main spar but the inboard of the rear spar is different between the two models.
It may be possible to take a completed set of -8 wings and use them for a -7 - but not the other way around.
If you look at the -7 plans (see DWG 10A [detail "C"] and DWG 38), the difference is in the rear spar. The rear spar on the -7 gets trimmed to a smaller profile. So the material on the rear spar exists on a -8 wing build - which allows it to be removed and profiled for a -7 application. This is why I believe the -8 wings could go on the -7, but not vice-versa.
If you look at the -7 plans (see DWG 10A [detail "C"] and DWG 38), the difference is in the rear spar. The rear spar on the -7 gets trimmed to a smaller profile. So the material on the rear spar exists on a -8 wing build - which allows it to be removed and profiled for a -7 application. This is why I believe the -8 wings could go on the -7, but not vice-versa.
gmcjetpilot
Well Known Member
RV8 narrow tandem, RV7 Wide Side By Side. This affects wing attachment.
You are absolutely correct about the width, sir. But that width is a function of the carry-through spar through the fueselage, not the wing itself. Again, I'm not sure it is possible to use -8 wings for -7, but Van's uses the same drawings for both airplanes. The major difference (as I see, and addressed above) is the size of the rear spar attachment. It is smaller on the -7, and trimmed to that size per DWG 38.
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