Joy was – take off the top wing & you almost had a Hurricane. So my transition was easy.

Not for nothing were the early Goshawk-powered design studies that eventually evolved in the Hurricane known as the Fury monoplane.

Then, of course, the whole process was briefly put into reverse with the slip-wing Hurri, which converted itself from a biplane to a monoplane in flight. Must have been baffling times for 1940 planespotters!