Found an interesting passage in a book and was curious as I have never heard of such a thing. Maybe I'm having a brain fart but this is new to me. Here's the passage; KG 200: The True Story by P. W. Stahl pg 105 "This would certainly also have been the case if they resurrected the BV 40 Project that had been shelved earlier. This device was a heavily armoured and almost invulnerable combat glider armed with a fixed 30mm cannon, initially intended to be towed to high altitudes then to dive into the American bomber formations." Wonder if anybody has more info.