This section was done during our visit to the factory’s Head Start program. First you cut a 3″ wide by 6″ long hole for the main spar in the fuselage along the engine/firewall bulkhead to where it lays on top of the of the gear bulkhead. It’s critical that the spar be set square and level, with the same sweep on both sides. To accomplish this we leveled the plane and then placed the spar in the cutout (seen in picture below) and leveled it. Then we measured the distance from the spar hardpoints to the nose on both sides to make that they were equal, and the plumb and level on the outside hardpoints. The spar was shimmed as necessary to obtain good alignment, and then match marks were made for shipping.
Center Section Spar Fitting
Posted By: Brett FerrellThursday June 13th, 2002 at 5:21 PM