seafury45,
Might've been a perspex panel (like a Stuka) or even an open one (like a Vengeance), in each case you (pilot) would have to sight through it from your seated postion. Very inaccurate - and very draughty, too, with our bomb doors open !
Danny.
EDIT: Wiki says:
- "4× 250 lb (110 kg) bombs internally", so must've been a bomb-bay, Sliding (?) panel would've been on roof of bay, not visible with bomb doors shut.