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Old 01-31-2018, 01:48 PM
Antoine MTA Antoine MTA is offline
Join Date: Jan 2017
Location: France
Posts: 1
Default QB Wings - Skin riveting issues

Hello VAF.

I started to rivet the last wings skin on my 8 : bottom outboard skin. Wings are QB.

I started riveting like asked in the manual, beginning at the rear spar on the inboard rib and working in an L pattern.
Before riveting the skin to the main spar, I moved to the next bay and I checked everything else still aligns.

And there is the problem, I have an offset between the skin holes common to the main spar. I have installed 100% clecos on this line of holes to see what happen. Clecos are difficult to instal and the skin doesnít align with the main spar.

The offset is about 1/32. But itís not possible to put the rivet in the hole. The dimple countersunk skin hole do not match perfectly in the machine countersunk spar hole.

The wings are QB so the spar were already machine countersunk. When I final drill the skins I noticed this little offset, but I didnít final drill the holes common to the skin and the main spar as the main spar was already machine countersunk. I final drill these skin holes with a reamer after removing the skin from the wing.

Left wing have the same problem but not yet started to rivet.

I've no ideas to fix the problem, what would be your advice to me ? Does anyone encounter same problem or similar with QB Wings ?

Thanks for you help.

Young French RV8 Builder

Link to photo

Last edited by Antoine MTA : 01-31-2018 at 01:53 PM. Reason: Adding link for the photo
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Old 01-31-2018, 08:54 PM
VA Maule VA Maule is offline
Join Date: Apr 2016
Location: Bucking ham, Virginia
Posts: 143
Default Wing skin

I recently completed my slow build wings and had the same issue . After much head scratching & beer drinking. I used several 1500 watt work lights as spot heaters for warming part of the skin to make a drastic but temporary thermal expansion differential. Those none conforming holes fell right in line. Riveted them down wile maintaining heat on the AFT. portion of the skin. The Finished work turned out nice and taunt and not a hint of "oil canning "
Maule MXT-7(daily flyer)
Lancer 235(partner)
Raidial RV-8R Ephanage Done, Wings Done, Fuselage on it's tall Grove gear & engine hung
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