Spitfire Aircraft Company MK III TR   September 2000   At this point I was building the Du Cros version that is all very light frame and no balsa infilled panels. The design of the longeron is minimal too, this was radically redesigned to handle the power of the Allison engine.

Firewall

Longeron

Longeron at frame 3

Fuselage from the front

Frame 6 forward