Shortround6
Major General
Things changed a lot in just a few years, what was a valid conclusion in 1938-39 was no longer valid in 1942-43.
Take the Mustang as it was really one of the few fighters that could do the long range mission. It was doing with 180-269 gallons of internal fuel and 150-300 gallons of external fuel. It also had an engine good for 1380hp (-3) take-off or 1490hp (-7) take off and 1300-1500hp at combat heights (over 20,000ft). Now "back date" it to 1939 in England with a Merlin III on 87 octane fuel. yes the engine and prop and 300-400lb lighter but you now have 880hp for take-off. How big a field are you going to need to get off the ground with even 180 gallons internal and 150 gallons external? Even a P-51A (with four .50cal) with an Allison went 9653lbs with that gas load. Going to 100 octane gas and using the boost override button could at least get you off the ground in the summer of 1940 with a Merlin III
The Zero was another long range escort fighter but after the summer of 1940 no western nation would consider using a plane without protected tanks and armor. Japanese had problems with the combat duration of the Zeros with only 55-60 rounds per wing cannon. Not a good thing to run out of ammo after just 6-7 seconds firing time on a long range escort mission.
The P-47N was a good long range escort fighter but again you had a sizable jump in engine power over the initial versions of the P-47 to help handle the load plus, in some cases, they were using WER to get off of smaller tropical airstrips.
I cannot pinpoint the exact moment that the long range fighter became feasible and I will certainly agree it became feasible a number of months (if not over a year) before it was actually done/planed but it was not as early as 1938-39-40.
Take the Mustang as it was really one of the few fighters that could do the long range mission. It was doing with 180-269 gallons of internal fuel and 150-300 gallons of external fuel. It also had an engine good for 1380hp (-3) take-off or 1490hp (-7) take off and 1300-1500hp at combat heights (over 20,000ft). Now "back date" it to 1939 in England with a Merlin III on 87 octane fuel. yes the engine and prop and 300-400lb lighter but you now have 880hp for take-off. How big a field are you going to need to get off the ground with even 180 gallons internal and 150 gallons external? Even a P-51A (with four .50cal) with an Allison went 9653lbs with that gas load. Going to 100 octane gas and using the boost override button could at least get you off the ground in the summer of 1940 with a Merlin III
The Zero was another long range escort fighter but after the summer of 1940 no western nation would consider using a plane without protected tanks and armor. Japanese had problems with the combat duration of the Zeros with only 55-60 rounds per wing cannon. Not a good thing to run out of ammo after just 6-7 seconds firing time on a long range escort mission.
The P-47N was a good long range escort fighter but again you had a sizable jump in engine power over the initial versions of the P-47 to help handle the load plus, in some cases, they were using WER to get off of smaller tropical airstrips.
I cannot pinpoint the exact moment that the long range fighter became feasible and I will certainly agree it became feasible a number of months (if not over a year) before it was actually done/planed but it was not as early as 1938-39-40.