If it has wings and one or more engines ...

Roy flew a variety of aircraft (and had the odd hair-raising experience) during his time at Kjeller. The military types were:

Fairchild Pt19 and 26
Harvard Mk II
Oxford Mk I and II
Anson
Norseman C64
DH Otter
Fiesler Storch
Spitfire Mk IX and XI
Mosquito Mk III and VI
Vampire Mk 3 and 52
Dakota C47
Lockheed Lodestar C60

Additionally he undertook test flying of the following civil types: