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Dear IV/IV-P Builders,

I just ran into my first discrepancy between the construction manual and configuration of parts as delivered. This is a heads up for those who have newer IV/IV-P kits. According to the manual, the aileron torque tubes on each side of the cockpit (that hold the control sticks) have ears welded to the front for a crossover tube that mounts above the torque tubes and passes behind the instrument panel. The new torque tubes have the ears installed so that the cross over tube mounts below the torque tubes. If the torque tubes are installed at the proper height in the rear and a ten degree pitch as directed in the manual, the crossover tube will hit the nose gear tunnel. We solved this by moving the front torque tube bearing mounts up about an inch. Because the geometry and fit of the rear torque tube bearing mounts is influenced by several other factors and complex to change, we installed the rear mounts at a 10 degree angle as specified in the manual. This resulted in the aileron torque tubes being mounted at about a 11 1/2 degree angle vice the 10 specified, and the rear bearing mount not being completely vertical to the tube. There are probably other solutions, but since I didn't discover the problem until I had the rear mounts and related hardware installed, I chose not to change it. On reflection, I probably wouldn't anyway.

Thought you'd appreciate the heads up if you haven't already figured this one out.

Bob Pastusek

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.