The airships might be of most interest on the WW1 and WW2 forum.
However, many of the airplanes, while some are WW1 or WW2 vintage, would likely be of most interest on the Pulp forum, regardless of whether its Pulp in the colonial, back of beyond, WW1, SCW, RCW, or WW2 setting. Since most of the figures on this forum are 28mm, the 1:50 scale airplanes are really worth a look, including:
Rumpler Taube
Fokker E III
Curtiss JN-4 "Jenny"
Junkers F-13 (the 1:50 scale one)
Ford Tri-motor
Junkers Ju 52/3m (a more expensive metal foil kit in 1:50)
Handley Page HP-42
Heinkel He 70 Blitz
Pilatus PC-6 "Porter"
Dornier Do 27 "Serengeti" (zebra stripes! -- ok, that one is colonial!)
I can really see a lot of these planes in Pulp scenarios. Thanks for the really interesting link!