Think of the scale. 40,000 US/British planes were lost or damaged beyond repair, nevermind the ones that got a few bullet/flack holes and survived - most planes every mission. Thousands of planes would meet for a single bombing run. One mission would give you a good enough sample.
Also note that between 5 and 20% of the planes didn't come back from each mission. How many more were damaged every run? Most? 15,000 flak cannons protected Europe, many of them radar guided/aimed. Strategic bombing was an incredibly crappy job: you died more often than a Marine in the Pacific.
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Think of the scale. 40,000 US/British planes were lost or damaged beyond repair, nevermind the ones that got a few bullet/flack holes and survived - most planes every mission. Thousands of planes would meet for a single bombing run. One mission would give you a good enough sample.
Steve Blank's presentation is great on this topic and radar: http://www.slideshare.net/sblank/computer-history-museum-112...
Also note that between 5 and 20% of the planes didn't come back from each mission. How many more were damaged every run? Most? 15,000 flak cannons protected Europe, many of them radar guided/aimed. Strategic bombing was an incredibly crappy job: you died more often than a Marine in the Pacific.