Some landing gears have a up lock that keeps the landing gear from dropping just due to gravity. Don't forget a B-17s landing gear is about 10 ft. away from the fuselage out under the inboard engines. You're not going to know if the landing gear will or will not come down until you try it, and you're not going to try it till you need it, because it would reduce your speed if it dropped early. With the hydraulic system inop, you wouldn't be able to get it back up. If the locks won't release, manual over ride on the gear, if they had it, would do no good.
The belly turret is armored, so breaking into it to get the gunner out, if possible, would take a lot of time. They could have very well been in a low fuel situation, almost out of fuel, and out of time.
The belly turret is armored, so breaking into it to get the gunner out, if possible, would take a lot of time. They could have very well been in a low fuel situation, almost out of fuel, and out of time.