I gotta disagree about the B-29. I have read that it cost more to develop and build the 3500 B-29s than it did to develop, and build the 19000 B-24s. B-24s could do a lot of things like ASW, mining, and of course strategic bombing at a reasonable cost,
The B-29 was a better aircraft, but I really doubt it was more cost effective
Agree with Parsifal, but only to a point. Add the cost of the A Bomb and the B29 and your pushing something like 8 billion dollars. Split that over the cost of both bombs and you are looking at 4 billion per bomb/bomber.
Add in the destruction of cities, mining and any of the other jobs the B29 did and it becomes much more effective. Considering it single handedly destroyed Japan's industrial base, it becomes very cost effective.
To your point, did the B24 have the range to operate from the Marianas with the bomb load that the B29 had when it firebombed Tokyo? If so, your arguement has merit and raises questions as to the effectiveness of the B29 in toto.
One odd point about the whole thread is the scarcity of data for assertions. While most of the aircraft mentioned have good points going for them (Yak-3 and the C47 strike me as the best bang for the buck items mentioned so far), there aren't any parameters.
The question might be better asked as:
1. What is the most cost effective fighter and why?
2. What is the most cost effective tactical bomber and why?
3. What is the most cost effective strategic bomber and why?
4. What is the most cost effective transport and why?
Take into consideration the mission, length of service, cost of development and manufacture, effectiveness at it's primary roll and later developed rolls.
Since I threw it out there, I'll start the ball rolling.
1. Tough, Me109 was a very cost effective fighter to build. Not sure of the field service. Yaks were both cheap and easy to maintain. P51 was good bang for the buck and did an outstanding job in it's field.
Probably go with the 109 just because of life of service (considering only WW2, not beyond) and general effectiveness. But it is very close.
2. Tactical bomber? Maybe the Mosquito. Non critical source of materials, effective in it's roll. But the He111 had a longer life, definitely dropped more bombs and was developed out of an air liner.
3. Toss up between the B24 and the Lancaster. For different reasons. B24 was mass produced and saw service all over the world. It is the quintessential heavy bomber that was designed for bang for the buck. Lancaster as it advanced Britian's policy of staying in the war more than any other British aircraft. Truely brought the war to Germany. Probably not cheap to build but was designed to be easier to build by doing that in sections.
4. C47. It was so good an airplane, even our enemies copied it.