For the last 15 years we have made a part called the “Front Spinner Bulkhead”. In our conversion manual numbering system it is Group #4000, Part #4002. It is just for Corvairs using Warp Drive Props and the Van’s 13″ spinner. The part has traditionally had a molded fiberglass bulkhead with an aluminum crush plate. Below are pictures of the latest version, it has been modified to be 100% Aluminum. All of the existing backorders on this part have been filled with this new design.
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Above, a look at the part from the engine side. This is the 3/8″ thick crushplate required by Warp Drive Props. It is a precision CNC part.
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Above the spinner side of the part. The six large holes allow getting a socket on the prop mounting bolts. The spun aluminum part starts out life as a Van’s aircraft part, but it has been fed through the CNC router at SPA/Panther to produce the correct SAE#1 bolt pattern and enlarge the holes for clearance. The complete assembly is put into a lathe, and checked for trueness. These Aluminum assemblies are slightly lighter and more true than previous Aluminum/fiberglass models. The sticker on the part shows that it has passed the final assembly check.
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This improved part is another example of how builders have benefited from my collaborative work with the Wesemans. 2016 has been a year of progress on the manufacturing and distribution of a number of products, all of which adds up to builders having a better opportunity to Learn Build and fly.
