10-15 years ago I had a phase when always ideas of imaginary WWII aircraft were haunting my brain. I created a lot of aircraft for many thinkable purposes. My drawings of this time still exist but are not for publishing, sorry. Two examples:
1) I always thought it was a pity if a catapulted CAM fighter got lost after serviceing. So which kind of airplane could be a thoroughbred fighter and be picked up from the sea without becomimg damaged by a water landing? I thought to derive it from this, how do you call this kind of toy in English, drag boat?
(picture from visitsthelens.com)
These creatures often tend to lift from water unintentionally, so why not to make them fly? Elongate the flat area further from the stabilizers (retractable like a wheel undercarriage) to a flying-wing configuration. The engine is located in the center of the fuselage and drives a swingable airscrew in the rear (like in Dornier Do 26 and Do 212). Compared to the picture, the bow is lifted a bit and contains machine guns.
Later studies showed me this design would not be able to take off from high seas and also the time of serviceability would be short because of deterioraton by hitting waves and corrosion from salt water. But at least with some of these you could give sufficient air cover to a quiet lagoon, unlike using a floatplane fighter.
2) I always liked the thought off a two-seat single-engined fighter that could survive in WWII. The Arsenal-Delanne design goes into right direction, but is not quite convincing to me. My solution looks generally like the Sunny ultralight aircraft (but upper wing fixed on the fuselage top), has the engine in the center and a frontal airscrew driven by an elongated shaft like P-39/P-63 have, and a gun turret in the rear. In this configuration, pilot and rear gunner have best visibility. The wings could be kept comparedly short, and the central engine together with the general configuration gives a very good weight distribution and so cares for an impressive maneuverability - at least I think so.
Hope you enjoyed my ideas!
Regards, RT