I will be glad to show some operational history examples so we can look at real numbers, as I did in the P-38 thread,
Except that showing was more promises than data.
In the 12 months to end August 1943 the 9th Air Force operated P-40 in the Mediterranean it recorded 101 combat losses from 16,508 sorties, making 229 claims for enemy aircraft shot down. 57th from August 1942, 79th and 324th from March 1943. (57th 127 claims, 51 P-40 missing, 79th 59/30, 324th 43/20).
The 12th Air Force started off 1944 with 3 P-40 groups plus an independent squadron, plus a group transitioning from P-40 to P-47, the final P-40 group, 324th, transitioned to P-47 end July 1944, with 145 12th Air Force P-40 lost to all causes in 1944.
When it comes to largely ceasing to engage in air combat the P-40 groups cut off dates were 33rd in September 1943, 57th in April 1943, 79th in June 1943, 324th in July 1943, 325th in August 1943.
Interestingly the 325th Group was assigned to the Strategic Air Force in early 1943, along with the 2 P-38 groups, the B-17, B-25 and B-26 groups. The 33rd Group was assigned to the Tactical Air Force. When it comes to the Spitfire both groups arrived in November 1942, the 31st and 52nd, both were assigned to the Tactical Air Force. When the Coastal Air Force formed in May 1943 the 52nd was transferred to it, ending up in Corsica, before both groups transitioned to Mustang as part of 15th Air Force.
That seems to be how things largely stayed until the November 1943 changes put the bombers and long range fighters under 15th Air Force, including the now P-47 equipped 325th. In early 1944 the medium bombers went to 12th Air Force.
As an aside as of 1 April 1944 the French component of the Coastal Air Force had 200 aircraft assigned, including in 3 P-39, 1 P-40 (with 1 P-40F and 24 P-40L) and 3 Spitfire squadrons.
The MTO USAAF thinks enemy aircraft shot down 2,526 of its aircraft, but only 124 of these September 1944 to May 1945. Fighter losses to enemy aircraft are put at 46 in 1942, 816 in 1943, 441 in 1944 and 24 in 1945.
By Feb 1943 the P-38 units were mostly flying longer-ranged bomber escort missions into Italy.
1943, P-38 NW Africa, sorties
January, 3 local defence, 29 offensive patrol/sweep, 123 strafing, 917 escort to aircraft,
February, 163 strafing, 74 strafing, 38 shipping attack, 604 escort to aircraft,
March, 3 local defence, 35 offensive patrol/sweep, 1,249 escort to aircraft,
April, 284 offensive patrol/sweep, 230 shipping attack, 895 escort to aircraft,
May, 8 local defence, 44 offensive patrol/sweep, 114 shipping attack, 8 shipping protection, 1,971 escort to aircraft.
The 9th Air Force started bombing Italian mainland targets in December 1942, Sicily in January 1943, the 12th Air Force started bombing Sardinia and Sicily in February 1943, the Italian mainland in April. It took until April 1943 before half the heavy bomber sorties credited with attacking were outside North Africa.
I really feel like we are talking past each other, but I'm just going to say this. I'm not trying to change the official score of any particular pilot (the case about Boyington is interesting and worth discussing, but not for the reasons you seem to assign to me) or any particular unit, or...
ww2aircraft.net
message 367, also note the promise in message 380,
1431 US victories claimed by the 3 P-38 FG in the MTO (most of these were over Italy from 1944) (another source says 608)
15th AF, fighter claims for destruction of enemy aircraft in the air, 1 November 1943 to 31 October 1944, P-38 560, of which 62 on missions to Italy, P-47 155, 108 Italy, P-51 771, 16 Italy. The main types claimed 825 Bf109, 277 Fw190, 88 Bf110, 44 each Me210 and Ju52. All up the 15th Air Force P-38 claimed 608 enemy aircraft destroyed, the P-51 976.
P-38 claims, in the 15th Air Force 608 enemy aircraft, add 663 January to October 1943, and 66.5 for 1942, total 1,337.5.
Luftwaffe lost 711 aircraft in 1943, 246 fighters (13% of German global fighter inventory)
According to Williamson Murray, the Luftwaffe lost 1,527 fighters to all causes in the south January to November 1943, out of 3,934 total aircraft losses. 246 is 13% of 1,893. The RAF puts German single fighter strength as 1,318 on 10 January 1943, peaking at 1,849 on 30 June, to 1,561 on 31 December, on average for the year, 1,590 single engine, 229 twin engine, and 70 fighter bombers, total 1,889. Inventory would be much higher. Also the US MTO fighters alone claimed nearly 1,400 enemy aircraft destroyed in the air, so if the Germans really only lost 711 in the south and all in the air on USAAF fighters hitting anything they were overclaiming 2 to 1, and way more as they were mainly claiming fighters.
The Spitfire totals are for a longer period of time, and also represent two or more types, Spit V and Spit IX. 31st FG also had some Spitfire Mk VIII.
The P-40 arrived earlier and left later, plus were more numerous.
For that matter, converting Spit Vs to use a Merlin XX or equivalent also seems like a winning idea, though I gather there were some 'fit' issues with the engine mounting etc. I think Spit V with Merlin XX is a lot more useful than Hurricane II with Merlin XX (or two speed V-1710).
In terms of engine altitude performance in North Africa end 1942 it was P-38, Spitfire V, Merlin P-40 and Hurricane, Allison P-39 and P-40. It is not a winning idea to cut the altitude performance of the Spitfire engine back to Hurricane levels, that would also mean it would also be a winning idea to replace all Merlin P-40 with Allison.
It is complex, and I agree confusing, but it looks like about ~1200-1300 F and ~700 L were built. I don't think several hundred made it to the British, who used them in only two squadrons (260 RAF and 3 RAAF), of which only one (3 RAAF) kept them for a really long time, due to both shortages of engines and airframes.
260 squadron kept the Kittyhawk IIA from June 1942 to May 1943, removing its last Kittyhawk I in September 1942 and adding Kittyhawk III in December. As of end February 1943 the RAF reported 2 Merlin P-40 in Britain and 105 in the Middle East on strength after 41 IIA lost overseas and 3 in in transit, end June 1944 it was 123 Merlin P-40 on strength in the Middle East, while 2 had been transferred to the USAAF. For the RAF in the MTO the Merlin P-40 was the anomaly.
The USAAF is quite sure, 1,311 P-40F were built, (plus 41-13696 for static tests only, never flew)
F 699
F-5 123
F-10 177
F-15 200
F-20 112
Also 700 P-40L
50 L-1
220 L-5
148 L-10
112 L-15
170 L-20
The RAF was allocated 150 P-40F/mark IIa and 100 P-40L/mark II, all 100 F to the Middle East, 2 IIa to Britain, 21 lost at sea, 127 to Middle East. Of the 1,500 P-40E-1 order meant for the British Empire it had 444 delivered in the US, the rest to other users.
The RAF was sent 191 P-40K-1, 52 K-5, 46 K-10, 50 K-15, 50 M-5, 44 M-10 and called them mark III.
As of December 1944 the USAAF reports official transfers of P-40 to the French were 24 F and 40 L September to December 1944 from British and US stocks. As of June 1945 it was 26 F and 56 L. Other P-40F and L used by the French were short term loans.
P-40 Contract
AC-12414, 1 XP-40F, taken from contract signed 26 April 1939
AC-15802, 31 P-40B, 193 P-40C, 79 P-40E, 999 P-40F (supplement 1 signed 6 October 1943)
AC-15865, 213 P-40F, 3 May 1941
AC-22714, 700 P-40K, 700 P-40L (supplement 1 signed 15 June 1942)
DA-913, 600 P-40K-1 (export version for Britain, most went to other users) signed 15 June 1942
AC-30491, 600 P-40M 24 August 1942
First P-40N contract 25 January 1943
The 1945 USAAF Aircraft Designations say 300 P-40R-1 (ex F) and 300 P-40R-2 (ex L), the 1946 version says 300 total, V-1610-81 engine (same as M).
Single stage Merlin production for the US ended in March 1943, with 2,833 accepted, along with 8 two stage Merlins. Of the 5,200 Merlin 28 built by Packard August 1942 to February 1943, Britain reports 5,165 shipped from the US, imports May 1942 to July 1943, 228 lost at sea, leaving 4,937 arrivals. Merlin 29 production of 480 for Canada February to December 1942. Both Merlin 28 and 31 (560 built) ended production in February 1943, initially replaced by the Merlin 38.