
Originally Posted by
ngc3314
The B-36 was probably the single piece of engineering most responsible for my Horrified Fascination with Cold War technology. But this is the forst time I've heard it mentioned as "fast". High-flying, long range, able to maneuver at altitude in a way early jets couldn't come close to - but fast? Cruising speed was listed at a blistering 230 mph.
But, cut the jets in and the old girl could make it up to around 420 - 435 miles per hour for the run to its target (usually about an hour before.
Now, that isn't spectacular speed, I agree but it is enough to cause the defense conniptions in the late 1940s and early 1950s, The problem is that most fighters back then were still piston-engined, very few could even get up to the sort of altitudes the B-36 habitually flew at (which were a lot higher than one might suspect from the bare performnce details. If we look at mission logs, we find that they habitually "bombed" US cities from over 49,000 feet). Even the ones that could get up there couldn't hold the combination of speed and altitude needed to maek an intercept. The rule of thumb is that the interceptor needed a 50 percent speed excess to do that. The early jets were short on operating altitude as well and still lacked speed - and the B-36 could out-turn any of them. (huge wings and excess power).
The B-36 became vaulnerable to defenses very suddenly. It needed two things to come together - fighters that could fly fast and happily at 50,000 feet and air-to-air missiles. When they came together (happened in the 53 -55 era), the B-36 changed from queen of the skies to cold meat.