So, you call a B-17 a two-engined bomber? After all it's got two engines on one wing. What do you call single-engined bombers? That must put you in a tight spot ... I mean ...do you say 0.5-engined bomber? You can't say no-engined bomber, that's just being silly 'cos ...you'd be screwed if a glide bomb was there ...no engine ...what's half of none?