What made the Germans think that this would work out any better than their composite aircraft scheme?

Sounds like a desperate scheme that would get a lot of good pilots killed. With no engine, the plane would have no way to evade escort fighters.

The Bf 109Gs and Ks could carry 1-at speeds above 400 mph over the bomber formation. Once released the Bv-40 would dive to between 530-560 mph and would not be able to be intercepted by any Allied fighter with speeds of between 437 mph- 500 mph in a dive. It also presented a very small target to both teh bomber gunners and escort pilots. It was intended for use with one pass at one bomber and then a glide back home like the Me-163. However, from height it could dive very well to avoid escorts and still make it back to base. If a climb and second pass it was hope to use a cable mine to destroy another bomber. Pilot was shielded with armor and the plane was also wooden making it very light. DC, with the Misteln the upper fighter pilot had to control both aircraft and since the explosive bomber lower was heavier, the speed was nowhere near 433mph as with the Bv-40, so many of them got shot down on appriach to ground targets from AA gunner or from marauding fighters. Many times the Messer and Focke pilots just ditched the weapon, having to fight the Allied aircraft pursuing at speed. Apples and oranges...