[Oatka]

Not only was its only exit hard to reach at the tail—leaving many trapped before being able to parachute out

A tad OT, but check out this mind-blowing photo tour (use arrows for a 360 view) of the crew positions of the B-17 "Sentimental Journey" . It looks like there's a bail-out hatch for the tail gunner. Links are near the bottom of the page.

[centurion316]

Several diagrams of emergency exits for the B-24 can be found here:

http://www.missingaircrew.com/plane.asp

[LifePath]

I fly on the B-24 Diamond ‘Lil - a part of the B29/B24 CAF squadron based in Addison TX. We have one of only two B-24’s still flying in the world. I can tell you that ‘Lil is loud, vibrates like hell, and we love her. We also have a B-29 in the squadron, the only flying B-29 in the world.

Want to work on a B-29 or a B-24? Want to fly with us as crew? Come join our squadron. http://www.cafb29b24.org/