The Stanmich B-10A was produced in 1941. It was designed as a large bomber, with extreme resilience. Now, I don't have the rights to a diagram of this, but the engine is in 10 seperate pistons, each of which can be shut off at once. there is also indication in the cockpit that the specific cylinder had been damaged. not only that, but the cylinder casing is said to be so thick, that you couldn't melt through it with a flamethrower. you need a cannon to dent it. you need 200mm caliber bullets to pierce it! 2 kilos of tnt is needed, all concentrated to a single point to blow through it. only 2 of these behemoths were ever grounded, not crashed, GROUNDED. one was caused by 2 propeller blades being blown off, and the other was caused by an almost full slice through the planes rearward fuselage. This was the A-10 warthogs grandfather, as its known today. resilient, impossible to crash (unless deliberately). The only recorded crash of a B-10A was in 1943, when it was shown to crash in such a way that would let a pilot walk away unharmed. it only fell out of use in 1948, when the B-45 was introduced.