Hey Hubbabubba,
How many versions of that BF 108 are there? I remember you discussing one with a constant speed prop at one point. Did that one ever get built? Did any of them ever have a 3 blade prop?
- Ivan.
It depends on what you call a "version". The prototype (D-IBUM) had "interceptors" on the wing extrados and no ailerons. It was called tentatively M-37 but was renamed Bf 108.
After a fatal crash of D-IBUM during low altitude testings of the interceptors, the five remaining Bf 108 (retroactively called Bf 108A) were build with a small aileron in addition to the interceptors.
The Bf 108A all had a VDM three blades propellers with manual adjustable pitch. They were motorized with Hirth HM 8U and Argus As 17 engines.
The next "version" was a transition suite of aircraft build, or simply modified, from the originals A to B, known as Bf 108B-0. No two were exactly the same. First, the wings were changed, then the cockpits, then the tails, then the propellers and, finally, the engines. So some Bf 108B-0 still had three-bladed props.
The Bf-108B-1, the main version, had normally a fixed wooden Schwartz or metallic Heine, but for extra money, Messerschmitt was offering its own manually controlled variable two blades Me P7 propeller.
The Bf 108B-2 was the military version and was supposed to have the Me P7 system installed "standard". The lineage is much more murkier than that; low priority and displacement of production to France forced the Luftwaffe to "draft" civilian Bf 108B-1 into military service and to "cannibalize" old aircraft to build new ones.
The Bf-108D differed from the B type by having the Argus automatic variable two blades pitch propeller, noticeable by its "orange juice maker" propeller hub. This was the only constant speed prop of the Taifun varieties.