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mandrill7
03-19-2006, 02:43 PM
Am playing thru some campaigns involving the P-38J in New Guinea. Historically the time frame for the campaigns would mandate the use of the P-38F, G or H, not available in this game.

I'm curious as to how large the performance difference really was between the types?

mandrill7
03-19-2006, 02:43 PM
Am playing thru some campaigns involving the P-38J in New Guinea. Historically the time frame for the campaigns would mandate the use of the P-38F, G or H, not available in this game.

I'm curious as to how large the performance difference really was between the types?

ImpStarDuece
03-19-2006, 03:22 PM
I'm not a Lightning expert by any stretch, but i'll give it a bash.

The P-38H was fitted with the same V-1710-89/91 engines as the P-38J. However, the P-38J recieved a revised engine and radiator arrangement, replacing the previous streamlined intakes and intercooler arrangement with the 'beard' type air intakes and a core type radiator.

The changes finally allowed the Allison to develope its rated power at altitude. The engine installation in the P-38H could produce ~1250 hp at a critical altitude of around 24,000 feet. It could do about 345 mph at 5000 feet and 402 mph at 25,000 feet. It could climb to 20,000 feet in about 6 min 30 seconds.

The engine installation in the P-38J allowed the V-1710s to produce a fully rated 1,575 hp up to a rated altitude of around 25,000 feet. Despite the more draggy intercoolers, the P-38J could do 360 mph at 5000 feet and 422 mph at 26,000 feet. Climb to 20,000 feet was about 5 min 40 seconds.

So, the P-38J is faster and climbs better than the P-38H at all altitudes. Its critical altitude is slightly higher and its engines produce about 300 hp more at peak power.

Gibbage1
03-19-2006, 03:30 PM
F G and H where totally differant aircraft. Its like compairing a 109E to the 109K. May not be as night and day, but its still a big differance.

The F G and H in reality where underperformers. The intercooler design did not allow the full use of the HP in the Allison engines, so they were underpowered and a bit slower. The F having 1325HP but only really able too use 1200HP, and the J having 1600 with the L having 1725HP. The physical differances are huge. Differant cockpit, yoke, canopy and also the engine booms were differant quite a bit. The early models were considered sub-par for air-2-air combat, even though they gave the Germans a good plastering in N-Afrika. The H model would be CLOSE to the J, but have about 200HP total less. Also the F, G and H had 60 round 20MM drum, and the J-L 100 rounds in a box.

So the F-H where mainly a lot slower and underpowered then the J. Maybe keep you P-38's at 75% would be close to an old F.