At least some jams were a charge failure, and the pilot could clear it by attempting to recharge the guns.
Regarding engine overheats:
Some simulators SERIOUSLY overdo the effects of engine temperature (Il-2 NEVER fixed the bug where the F4U engine overheats after about a minute at full power, even with cowl flaps open). Someone around here posted test data where radial and liquid-cooled engines were run continuously at WEP for several hours, and afterwards when the engines were disassembled there wasn't any major damage found.
As far as being able to pickle off a single 1k egg from 30k and hitting the target, the reason for this is that HTC DRASTICALLY simplified bombing because people complained about it being too hard.
The reason high-altitude bombers needed a whole formation to knock down a handful of buildings is because:
A) The bombsight wasn't as accurate as popular history makes it out.
B) Factors such as wind and drift would scatter ordinance off-target
C) Only the lead plane actually bombed from its site. The rest of the formation released when the leader released WITHOUT AIMING. If the lead plane miscalculated the drop, the entire formation would be off.
It had nothing to do with whether a bomb was a dud or not. They carpet-bombed strictly because it was easier to hit the target with a mass of bombs, rather than being pin-point accurate.
Now, none of these factors occur in the game. The bomb site, once calibrated, is laser-accurate. There's no wind or drift of bombs. And it's very rare to see a historical-type bombing raid with everyone dropping with the leader. Instead the mission may get TO target in formation, but then everyone spreads out and individually aims and drops their ordinance.
