Robert Ball - Page 2
December 7, 2019
We are advancing a bit every day, this past week the outer wing panels were framed up and the shape of forward nacelles has been started.
On this top view of a nacelle you can see the original lines of the cooling intakes and the proposed changes required because of insufficient cooling airflow to the Continental flat 12s. The model was framed up for the original version but I decided to build it as it was configured on its last flight.
Sides were tapered 7 degrees and tilted in on the bottoms 10 and 13 degrees (see second drawing)
The outer wing panels were formed up on a 5/8” carbon fiber tube and a .300” arrow shaft used as an anti rotation tube. Simple blocks of wood were cut to the rib spacing, notched out where glue might creep into and laid out square. The wing washout was built in by Jim and extends from root to tip. As it sits on the airframe the washout at root is 0 degrees and the tips 3 degrees.