Gregor F.D.B-1 (oz2005)

About this Plan

Gregor FDB-1. Scale Canadian biplane fighter. From Aeromodeller, August 1945.

Quote: "THE last of the biplanes, the Gregor was the first all-Canadian fighter and was a very creditable effort. It was powered with a Pratt and Whitney Wasp Junior, which gave it a speed of almost 300 mph. The Wasp Junior develops about 750 hp at rated altitude, and if we compare this with biplanes of similar horse-power we see that the CCF engineers have produced a very worthy first effort.

The span of 28 ft gave a moderate wing loading, and the landing speed was by no means excessive (flaps were, of course, fitted). The armament was two 0.5 cal machine guns considered sufficient in 1938, when the Gregor first appeared. No detailed performance figures were given out, so the description must necessarily be short. The CCF is now (as far as is known) building Hurricanes.

The Fuselage. Cut formers from 1/16 in sheet balsa, keels from 1/16 sheet substitute. Pin keels to plan, add left formers, leave to set, and check that they are at right angles to keel. Add 1/16 in square stringers; while setting make cowl; 1, 2 and 3 are 1/8 in soft sheet rings (1 and 2 are rings, 3 is a disc with a square hole about its centre), size determined by block on dummy crankcase.

Cement 1, 2 and 3 together; now build up crankcase from two 1/8 in sheet discs and a block, which must be a tight fit in the square hole in 3. Add cowling spacers and 4, cover with 1/16 in sheet. Remove half fuselage from plan and complete other half. Add soft balsa blocks at tail end as shown..."

Supplementary file notes

Article.

Corrections?

Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction