I'm sure bomber pilots used charts because they had more than one pilot and they could do it. You can't do it when your flying alone. Maps are always used to nothing special there. Why would you need fuel consumption charts? You do the math before you take off and when your already flying you know how much fuel time you'll have for cruise and how long you can afford to stay in combat. There is no such thing as wind charts, winds get updated all the time and in the 40s you could not get such an actuate forecast so you could not really compensate for wind well, that's the reason a lot of pilots were getting lost.
So if you have one pilot on board the only thing you have is a map and a checklist.
machfly I sometimes wonder just how much flight time you have.
I sure as heck had performance information available when I was flying. The POH for light aircraft covers it, fits in the map box and it just isn't that big of a deal to look something up even if you are the only pilot.
Sure, you "do the math" before takeoff but sometimes things change. Weather moves in, the alternate goes to heck and you start working out where to go, how to get there and
if you can get there. All that math you did before the flight goes out the window as soon as things change, you better have the performance info where you can get to it.
So if you have one pilot on board the only thing you have is a map and a checklist.
If this is true the pilot is an idiot.