Hi everyone,
on the Arado E 380, from "Secret German Aircraft Projects of 1945", Toros Publications, 1997, p.24:
" A low-wing floatplane with faired float attachments intended to replace the Ar196 and powered either by one As402, one BMW 323R-2, or one BMW 801A engine. There are two versions, one armed like the Ar196, the other with 2xMG151/20 (front)+1xMG131(rear)".
From "German Aircraft of the Second World War", Smith/Kay, Putnam, 1972, p.727:
"Floatplane development of Ar196 with folding wings, one 1600hp BMW 801A"
My german is still sketchy, but Kranzhoff`s latest book on Arado refered to a projected started in 1942, closely related to the aerodinamically improved ( with bigger twin floats and already with MG151 ) Ar196 C, intended as a carrier plane ( traegerversion ), with better protection and armament. An Argus As411 was to power this bird at 383km/h. Project of 1943.
Some of this data does not match entirelly, but it would be interesting to know more on the Ar196C and the Ar E380.