Hi Hogenbar,
>I never have seen a picture of a radial engined Bf-109 derivative. Does anyone have more info on the v21? Performance, what kind of engine exactly, flight characteristics? Why didn't they continue with it?
The V21 was Werk-Nr. 1770, D-IFKW, powered by a Pratt & Whitney Twin Wasp SCG. It looks like an Emil derivative in having rectangular wingtips, but the horizontal tail lacked the Emil's braces. The tail wheel was almost completely retractable. Wing span and gear track width probably were slightly increased due to the wider fuselage. The radial engine had a standard cowl with a ring of cowl flaps for cooling. The aircraft had a three-bladed propeller and no spinner. The oil cooler looked a bit like the standard Messerschmitt oil coolers, but of course there were no underwing radiators.
Despite the obvious similarity to a Me 109, the aircraft actually looks more like a Zero on a strict diet ;-)
It appears the project was not continued with because the prototype had poor handling characteristics, but I'd like to learn more about this project, too :-)
Regards,
Henning (HoHun)