It takes about 4 sectors or more to get a B-17 loaded with bombs and 75% fuel to around 30k. Many fighter planes can get to that alt in much less time. I have fought many planes at 30k plus in a B-17 formation and I am moving at a speed that is slow. That is where the fighters can hit and travel on to come back for another pass. The B-17 is a sitting duck with only his gunnery ability to make it home safely. I believe some of the enemy fighters get impatient and make careless moves that ends in their death. Many bomber targets are deep into enemy territory. That means long flights and a lot of time for the enemy to up an intercepting plane. At 30k or more, I have encountered P47s, P51s, spits, 110s, mossies, 262s, 163s, 109s, 152s, etc.. They all fly faster than the B-17 at that alt. I would rather not penalize a bomber pilot. The b-17 does have a ceiling alt. 37k to 38k and you are barely moving at 120 +/- speed. That's without eggs and a not a lot of fuel.
One-eye