Wildcat during the Battle of Britain

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It appears to that the actual myth is that Welch never said that, because he did.

His dislike of the P-39 was well known and one of the reasons why he was allowed to transfer to 80th FG - his CO (of the 36th FS) was tired of the constant requests.
Once he got into his P-38, he went on to down two A6Ms, three KI-61s, three KI-53s and one KI-46 - in less than six months.
He would have most likely downed more, but suffered from Malaria, which forced him to retire in 1944.

So perhaps Welch may not have been the right guy to use as a pro-P-39 example?
 
....Welch - he shot down more Japanese in a P-40 (4) than the did in a P-39 (3 - which included two Vals on 7 December 42....
IIRC, the Pearl Harbor kills were over two sorties, whereas he shot down three Japanese fighters in one sortie in the P-39, so the P-39 still comes out better.
....He repeatedly asked to be assigned to a unit that was equipped with P-38s....
Yes, but only because the Japanese bases were too far away for the P-39s to be used offensively, which meant they were kept back for air-defence. The Japanese in New Guinea in late-1942 weren't doing daylight raids on the US bases, which meant the P-39 units spent a lot of time doing nothing whilst the P-38 jocks built up scores, because the longer-legged P-38s were used for escorting the Allied bombers hitting the Japanese bases. Welch was aggressive, he wanted to see more combat, so he asked for a switch to P-38s for that and only that reason.
....In short, Welch did not like the P-39.
Sorry, but that's not the case, that's simply the incorrect conclusion drawn by P-38 fans because they did not understand why he wanted to transfer to a P-38 unit. A pilot that does not have confidence in his aircraft would have been very unlikely to engage and shoot down three Japanese opponents in one sortie, one a Zero, as Welch did in a P-39D-1 (serial 41-38359) on 7th Dec 1942.
 
More myths.


The inter-cooler was much too small.
The radiator was in one wing and couldn't cool the engine properly.
The oil cooler was in a duct on the other side of plane and also had cooling problems.
Different angle on the plane

Gives a better idea of the intercooler duct.
Slot in the walk way on the wing is the exit from the radiator.
Please note that neither the radiator or the intercooler had no good way to adjust airflow, meaning that when climbing there wasn't enough cooling air flowing through them and at high speed there was too much air flow creating too much drag.

Basically the original XP-39 that went to the NACA was a dog's breakfast of an airplane that stood no chance of making it's advertised numbers.

We have a lot of other threads on this with numbers for the airflow (how much over or under for climb and highspeed).

Please consider that General Arnold was making arrangements for XP-39 to go to the NACA wind tunnel in a matter of weeks after it's first flight. And it spent 15 days on the ground between the 2nd and 3rd flight while they worked on the cooling problems (Engine and oil cooling) the 3rd and 4th flight on the same day totalled 47 minutes so the turbo was probably hardy used. They were retracting the landing gear though
Next day (flight 5) the landing refused to extend for a period of time and after finally getting it to lower the nose gear failed on landing taking the XP-39 out of service for another period of time.

The P-39 program stood a good chance of being canceled outright if they had stayed with the turbo.

General Arnold may have been looking for a 2nd fighter to the P-40 to build while waiting for the P-38.
 
I would note that the "hand fitted" Allisons for the Flying Tigers were actually built of initially rejected parts that were reworked. Often castings with one or more bad bolt holes that were redrilled and fitted with a repair insert. It was only by using this "stock" of parts that Allison could build the engines for the engines that would wind up going to the Flying Tigers while meeting their other delivery commitments.

I would really, really love to see the specification sheets that show these loser mass production tolerances. The small amount of information I have on allowable tolerances for overhaul of both early Allison and Merlin engines shows almost no difference in the tolerances listed (which is not an extensive list) and the list often give tolerance when new and tolerance for used/overhauled engine.


It is easy to understand why Merlins were more difficult to set up and service. They had a lot more fasteners holding them together, like a lot more fasteners holding on the valve cover boxes. So yes, it takes longer to take covers off and adjust the valves and put the covers back on.
Which is a far cry from the oft repeated claim that the Merlin was a more mechanically complicated engine. They are both 12 cylinder engines with 4 valves per cylinder and a single overhead cam in each head. Where is the extra mechanical complication?
 
Please note that neither the radiator or the intercooler had no good way to adjust airflow, meaning that when climbing there wasn't enough cooling air flowing through them and at high speed there was too much air flow creating too much drag......
Yet the XP-39 prototype was already far faster and climbed better than any P-40, prototype or otherwise, right up to the P40-Q. When the XP-40 prototype first flew on October 14, 1938, it struggled to hit 300mph! Things had improved before the first production P-40 (two .50s only) flew on April 4, 1940, the plane hitting 357mph. By comparison, the XP-39 prototype hit 390mph when it first flew on April 6, 1939. The USAAC was aware of Hawker's first flight of the new Typhoon on 24 February, 1940, and that Supermarine had test flown the Spitfire MkIII on 16 March, 1940, both of which promised 400mph speeds. Is it any surprise the USAAC hedged their bets?

.....Basically the original XP-39 that went to the NACA was a dog's breakfast of an airplane that stood no chance of making it's advertised numbers.....
The XP-40 didn't make its advertised numbers either, but Curtis had the size and political clout to get orders. And lets not mention the time wasted on ducted spinners!

.......The P-39 program stood a good chance of being canceled outright if they had stayed with the turbo.....
the fact the USAAC persisted with the P-39 is itself a measure of just how bad the situation was in American fighter production, including the P-40. The P-40 when it was accepted into service was already acknowledge to be obsolete compared to European aircraft; the P-36 had already long passed its design zenith; the P-38 was still looking like a risky and expensive bet; the P-35 was past obsolete, and the civil war going on in Seversky/Republic did not bode well for future developments (indeed, Republic were behind the curve until they got the P-47 out the door); and Vultee's P-48/63 was not promising to be any great step forward. The USAAC was so desperate they even considered the Douglas XP-48, which had a ridiculous prediction of a 525mph top speed from a 525hp engine - lunacy! Indeed, it seems quite clear that the state of the US fighter design and the clout of being the biggest pursuit manufacturer saved the P-40 program, but the mediocre P-40 also kept the P-38 and P-39 from being cancelled.

....General Arnold may have been looking for a 2nd fighter to the P-40 to build while waiting for the P-38.
More than likely, given Curtis's development performance! Comparing the development histories, the XP-39 was ordered October 7, 1937, with the first P-39C delivery in January 1941. That's with full armament, cannon and machineguns. By comparison, the P-36-modfied-with-an-Allison XP-40 was approved July 1937 (3 months earlier), but only delivered as the two-gun P-40 on April 4th, 1940. So Curtis took 34 months to get from P-36 to a two-gun P-40, whilst Bell got from concept to the higher-performing and heavier-armed P-39C in 39 months. Seeing as General Arnold could probably see the progress from both teams, I'm not surprised he kept the P-39 program running.
 

The Bolded part has been shown to be a myth, even the more fervent XP-39 supporters only claim about 375mph on one of the few test flights before it was shipped to Langley and they don't even tell which one. See the other threads. Check the information. One source says the engine was not cleared to run at over 2700rpm before going to Langley, another says the limit was 2600rpm. This due to an anticipated vibration problem with the drive shaft which was redesigned while the plane was at Langley.

This is supposed to be thread about the WIldcat in the Bob. Not a rehash of the myth of the 390mph XP-39 and stories of conspiracies.

Here is one of them: XP-39 and the Claims
 
P-38 fans creating conspiracies? I thought it was Curtiss.
And Welch shot down four A6Ms with two probables at Pearl, in a half-armed P-40B. Yes it was two sorties, all the while under attack and wearing pajamas.

I admire the dedication to try and prove that the P-39 was the world beater that conspiracies have buried, but the three aircraft that Welch downed in his P-39 was one fighter and two Vals. He was not in an isolated location, he ooerated in the Buna area of New Guinea which was a target rich environment.

Welch and many other pilots did not like the P-39, including Bill Overstreet who managed to get into Mustang's and went on to be an ace in Europe.
 
.....I admire the dedication to try and prove that the P-39 was the world beater.....
Nope, not a worldbeater, but definitely much better than a lot of critics make out, and certainly far better than the P-40. Remember, Pokryshkin was choosing a P-39N to fight FW190As and Bf109Gs in 1944, and he shot down plenty of both. I don't remember any ace of any airforce in 1944 flying the P-40N by choice, not unless they had zero other options. That says a lot about the P-39. You can mutter about Pokryshkin only fighting at low level all you like, an FW190 is still an FW190, and probably at least the A5 variant in 1944.
 
The choices that the USAAF pilots had were pretty broad, but in the environments in which they operated, the P-39 suffered from inadequate range and both it and the P-40 inadequate high-altitude performance. Both also had to compete with superior aircraft for the USAAF pilots choices.
 
so Churchill started the BoB ?
you really believe that ?
Yes, Churchill started it by calling Hitler's bluff, knowing that doing so would force the Germans to attempt an invasion. Hitler's 1939 plan assumed that all he had to do after the fall of France was threaten the UK with a U-boat blockade and bombing, and Churchill would accept a negotiated peace. Hitler even had this crazy idea that Britain would then join the Nazis in attacking the USSR! Some of this was due to the British Foreign Secretary, Lord Halifax, who had secretly tried to open peace talks via Sweden on May 20th 1940, before France had even fallen. Halifax knew Hitler wanted a deal with the British Empire because Halifax had discussed it with Hermann Goering in 1937. On June 30th, Jodl at the OKW issued a communique stating that they had won the War and that a British compromise was inevitable. Even as late as July 2nd 1940, Hitler instructed von Ribbentrop to write a speech to again offer a negotiated peace. Churchill told Hitler to get stuffed. Hitler was left with no real option but to try and carry out his threats, to do otherwise risked leaving an enemy in his rear when he turned to attack the Soviets. The Kanalkampf attacks, the first phase of the Battle, started on July 4th 1940. So, yes, Churchill started the BoB.
 
....The reason that the Tomahawk was judged unsuitable was that it lacked armour and self sealing fuel tanks, and its performance was lacking.....
The Tomahawks the RAF had ordered from Curtis were Model H81-A2 and had external self-sealing liners (Tomahawk MkIIA) or internally-lined fuel tanks (MkIIB), and all had seat armour and a bullet-proof windscreen. The unarmoured P-40s received were from the French order and were Curtis H81-A1 models, and were absorbed into the RAF as Tomahawk MkIs. The MkIs were only used for training, the MkIIs were sent to the Desert.

....I am not sure that any assumptions were made as to what would be faced in North Africa.....
There was no need to assume anything. Italy was officially neutral up until June 10th 1940, and Mussolini was keen to export weaponry for foreign currency. The cheeky Brits pretended they were interested in buying Italian aircraft and weaponry, and in December 1939 a British purchasing commission was allowed to test the newest Italian fighter and bomber models. Whilst there is some discussion over whether it was a real offer or an attempt to screw with the Italians, the Brits even enquired about ordering 300 Reggiane Re.2000s. In the event, the RAF knew the Tomahawk MkII was more than viable against the likes of the Macchi C200 and Fiat G50.
 
Circling back to the beginning. Put the Wildcat of 1942 into the BoB and you have something useful.
Yeah, but if you're allowed to dip into 1942, then I can have a Spitfire IX, or a Hawker Typhoon. And a Typhoon could easily outrun a ME109E-4 at the heights the German bombers were flying in 1940, and hit the bombers with four working Hispano cannons. Of course, then the Germans could have Bf109Gs with drop-tanks too, or FW190s....
 
Remember, Pokryshkin was choosing a P-39N to fight FW190As and Bf109Gs in 1944, and he shot down plenty of both.
And that was a P39 modified and optimized by the Soviets to customize it for the unique requirements of their war. Range was not an issue, and neither was altitude performance: the action was down in the weeds. Wing guns were removed for weight and maneuverability reasons, as Russian pilots tended to shove their guns into the enemy's cockpit before squeezing the trigger. Some of the aft mounted electronics were removed, improving the weight and balance issue. Allison engines were pushed routinely beyond manufacturer's limits, which they seemed to handle just fine and the cold climate helped. So now you have a "tricked up hot rod" airplane customized for its combat environment, and not representative of its species as a whole. This has all been covered in other threads here.
If I had to fly combat, I'd give my eye teeth to fly a plane customized for the tactical situation.
 
Well, we are in the What'if forum.
 
It appears to that the actual myth is that Welch never said that, because he did......
Not what I've read. Yes, Welch wanted a transfer to a P-38 unit, but not for the reasons given. Welch's complaints centered around the fact that he was not seeing any action in the P-39D because its short range meant he never met any Japanese aircraft. He could have been flying the Spitfire IX and he would have had exactly the same complaint. As for Buna being "target rich", Welch saw combat only once his whole tour there, and that was December 7th 1942. One solitary combat. Yet he knocked down three Japanese aircraft, including a Zero, in a P-39D.
Other pilots in the same theatre were quite clear over their preference for the P-39. 8th FG pilot Boyd "Buzz" Wagner, the first USAAC ace, was very clear that the P-39D was superior to the P-40E. He didn't think the P-39D was faultless, indeed it was he who coined the term "Iron Dog". He stated that "the Airacobra was better than P-40E in all respects except horizontal maneuverability" - sounds like a preference to me! He flew both in combat, going from the P-40 with the 17th Squadron of the 24th Pursuit Group in the Philippines to the P-39D in New Guinea. Boyd also didn't see much action over New Guinea, but on April 30th, 1942, he shot down three Zeros to add to the five Ni27s he shot down over the Philippines. Ironically, he was ordered home to help Curtis improve the P-40, and was killed in a flying accident in a P-40K in November 1942. I don't know if Boyd ever got the chance to fly a P-38, but he doesn't seem to have regretted flying the P-39.
 
There was plenty of modifying done by RAF and American pilots. The first rear-view mirrors fitted to Spitfires were bought by their pilots from the local Halfords. In 1940, many Fighter Command squadrons experimented with more boost long before it was officially sanctioned. Bob Tuck moved the turn-and-bank indicator in his fighters to just under the gunsight, so he could ensure he was shooting straight. Pete Brothers is a particular example from the BoB, amongst other tricks he modified his Hurricane MkI before the BoB to carry more ammo and planed down the rudder trim so he could make the Hurricane crab sideways, making it harder for attackers to judge deflection.
On Malta in 1940 and 1941, the Commanding Engineering Officer, Squadron Leader Louks, extensively modified Gladiators, Hurricanes and Blenheims, and he totally rebuilt Hurricanes to turn them into long-range PR machines. His exploits were famous to aircrew and notorious to senior officers, and his unauthorised modifications are credited with inducing the senior Engineering Officer in AHQ Cairo to a nervous breakdown.
The late model P-40s got the nickname "Gypsy Rose Lee" because the operational units stripped equipment out to try and make them climb better. The same thing was done with Spitfire Mk VIs and VIIs, with many of them flying with the Browning .303s removed. Sometimes kit was added to improve combat capability. Several Blenheims from 113Sq were modified in 1941 with a nose-mounted Hispano cannon for ground-strafing, a trick they copied from 1940 Coastal Command pilots who added a 20mm Oerlikon to their Avro Ansons for attacking U-boats. It wasn't really that uncommon.
 

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