Good information but are relying on "Bloody Shambles" for thr 1:3 rato for the P-39 in new Guinea? [/url]
No, it only covers to the end of the first set of Japanese offensives in that area around the beginning of March. For New Guinea I'm comparing the Japanese losses given in Sakaida "Winged Samurai" w/ the US claims and losses given in Hess "Pacific Sweep".
The 8th FG (P-39) claimed 45 enemy aircraft April 30-June 1 1942, 37 of them Zeroes, losing 26 P-39's in air combat almost all to Zeroes. They were the only Allied fighter unit at Port Moresby having relieved 75sdn RAAF (P-40) when they arrived. The unit opposing them was the Tainan Air Group, A6M's, with suffered 11 pilots KIA in the same period. So actually I misrecalled 1:3 before looking back at notes, sorry, it's more like perhaps 1:2 considering in this case some of the combats were over the Japanese airfields and they could have lost some planes w/ surviving pilots, though it's not mentioned in any specific accounts I know of.
Going on to P-40 in defence of Darwin from March22 -August 23 1942, for completeness, the sources are Kagero series book "3rd/202nd Air Group" v. again Hess. The 49th FG claimed 33 Zeroes for the loss of 18 P-40's in air combat, all or almost all to Zeroes though also trying to shoot down bombers. The 3rd Air Group was escorting the raids and recorded 8 actual losses.
Back in Philippines source is Bartsch "Doomed at the Start". There weren't that many air combats, the Japanese mainly neutralized the US fighters destroying them on the ground, thereafter mostly the JAAF fought there. In the first two big attacks 11 P-40's and a P-35 were downed or written off to air combat, v 7 A6M's (3rd and Tainan) lost to all causes, at least one to a PBY's defensive fire and probably at least a few to AA while strafing, nobody can know at this point. The A6M's got another P-40 later, and surprisingly P-35's got an A6M December 24 in return for one P-35 damaged beyond repair. Complete US claims aren't given. The small remaining force of P-40's had a number of encounters with the JAAF Nates until near the end, but the book uses a JAAF source without complete day by day losses. But, P-40 v. Nate in the Philippines seemed about even.
The 3rd and Tainan Air Groups were also the IJN opponents over Java; the February Darwin raid was the exception, being carrier based A6M's. The Tainan was worn down over G'canal from August, though as a unit it outscored the Marine/Navy F4F's (they in turned outscored other Zero units to end 1942 about 1:1 v A6M's). The 3rd didn't see heavy combat again until 1943 when renumbered 202nd it downed about 26 Spitfire V's (air combat, a few could have been by bombers but it's *doesn't* count the heavy Spit fuel/mechanical losses) over Darwin that spring-fall in return for 3-4 A6M's, better than it had done against P-40's over Darwin the previous year, counter to the general trend of the air war. Source, both sides, is Price "Spitfire Mark V Aces", also the Kagero book.
Joe