I agree with Shortround, I think you have to take into account some of the practicalities that led to aircraft being "underrated"
1) Halifax - not as much fun to fly as a Lanc, much harder to land and a lower ceiling what attracted the flak. Hardly surprising that the Halifax crews felt like second class citizens. And Bomber Harris hated it with a passion!
2) Whirlwind - Petter's overly complex design was hard for Westland to cope with - hence a lot of the niggles. Also it's high landing speed restricted the number of airdromes that it could operate from. And it was typical of Petter to go for the minimum dimensions/weight route and fixate on the RR Peregrine. Willy Messerschmidt was much more sensible with the Bf 110 and designed a bigger airframe that was way outside the RLM spec, but able to take a lot of stretch (Jumo210 to DB605's) and last out the war.
3) Liberator - boring to fly, "like driving a bus" to quote Winkle Brown. Vulnerable wing spar, easily damaged and well known to the experten. Why did such a much later design have a performance not much better than the B17, and yet be less fun to fly and easier to shoot down?
1) Halifax - not as much fun to fly as a Lanc, much harder to land and a lower ceiling what attracted the flak. Hardly surprising that the Halifax crews felt like second class citizens. And Bomber Harris hated it with a passion!
2) Whirlwind - Petter's overly complex design was hard for Westland to cope with - hence a lot of the niggles. Also it's high landing speed restricted the number of airdromes that it could operate from. And it was typical of Petter to go for the minimum dimensions/weight route and fixate on the RR Peregrine. Willy Messerschmidt was much more sensible with the Bf 110 and designed a bigger airframe that was way outside the RLM spec, but able to take a lot of stretch (Jumo210 to DB605's) and last out the war.
3) Liberator - boring to fly, "like driving a bus" to quote Winkle Brown. Vulnerable wing spar, easily damaged and well known to the experten. Why did such a much later design have a performance not much better than the B17, and yet be less fun to fly and easier to shoot down?