The US tried to get its P-80 into service in Italy in 1945, but it was totally non-operational due to engine issues.
Of the seven pilots killed in P-80s up to Aug. '45, two were caused by fuel pump failure although both had a backup fuel pump but were not operated properly by the pilot, one of these was Bong, one was caused by a midair collision, one was a failure of the tail pipe flange (this was one of the planes sent to Europe), one by over rotation and stall on takeoff, and one due to possible trim tab failure. An earlier, non-fatal, accident was caused by impure metal used in manufacturing of the turbine wheel. So, of the first seven fatal accidents of the P-80, none can be attributed to failure of the engine itself. One non-fatal accident that was an engine failure was a manufacturing quality problem. Additionally, the deployment to Europe was considered successful and the P-80 assumed rapid procurement. The one loss to these four was due to tail pipe separation. So I don't think your comment can be supported.
The Jumo 004H would have offered 3970 lbs thrust and been in service some time before the Nene, as it was just an enhancement of the 004 rather than a bigger Derwent, like the Nene was. Yes, the Nene would have been better than the Jumo 004H (though the Nene would have lost to the Jumo 012, which was a bigger 004 like the Nene was a bigger Derwent), but the Nene wouldn't fit on a Meteor, so would require a new jet fighter.
At the end of the war the Jumo 004H was only a few drawings and a pile of parts on the garage floor. It was nowhere near running much less meeting any performance requirements. The Nene had already been running for over six month with at least 4000 lbs thrust and probably 5000 lbs thrust. There is no way the 004H could have been developed faster than the Nene unless dangerous shortcuts were taken.
the Nene was a bigger Derwent), but the Nene wouldn't fit on a Meteor, so would require a new jet fighter.
Like the very capable Vampire?
German jet engines were ahead of the British ones by about a year or so. Even with the Jumo 004 being a dead end there were still developments of it that would have kept its edge if the war had gone on for a few more years until it could be replaced by something better, of which there were several other designs still having their problems worked out. I find it interesting that so many here seem to think that the post-war designs of the Allies were indications of their superiority of the Germans, while ignoring the other engines which also had not reached service yet that were under development with German firms. Comparing the Jumo 004 to post-war designs is not comparing apples to apples.
I think that German jet engine technology had fallen behind the Allies by the end of the war in thrust and thrust to weight. German jet aircraft integration was still ahead by six months or so and their theoretical aerodynamics was probably a year ahead, but not their engines, which hampered their advantage in aircraft integration.
That would have given the Jumo engine greater performance until 1946, by which time the Mark IV Derwent would be around, but then so would the 004H and probably the Jumo 012.
You mean the previously cancelled Jumo 012?
The P-80 was not able to get into service, despite being deployed to Italy in 1945; its engines were a mess and it couldn't even fly.
Not true.
The entire point of the Axial flow design was it was easier to get into service quickly, even though the Centrifugal design was more efficient; it was more difficult to get into service quickly and needed many more years to get it into widespread service.
The axial flow engine is much more complicated with multiple compressor stages. The reason the British had to catch up, and did, was because of the late start of the effort. If the Germans had started their work on the centrifugal compressor at the same time they did the axial, they would easily have been a year ahead of Britain, maybe more, an could have fielded much more powerful production jets much earlier than they did, in my opinion.
That was a first test, that means nothing about getting an engine ready for production and service. Otherwise the Jumo 222 would have been ready in 1941 along with the Jumo 004.
There is a huge jump between having a paper design and a production jet engine. A major hurdle is a working prototype, which, when it came to thrust improvements, the British and the Americans did, and the Germans DID NOT.