We have built a total of about 1250 of this aircraft, but only fifty were allowed to be used as fighters - as interceptors. And out of this fifty, there were never more than 25 operational. So we had only a very, very few.
This technology was just beginning. And, in addition, Germany was very poor on war materials, especially on chrome-nickel and other steel, which were needed for the blades.
The total period averaged between engine changes was unbelievable - 12 hours! And since Hitler had given the order to use this aircraft only as a bomber, there was another mistake made: to build an even smaller aircraft with only one engine in top of the fuselage, behind the pilot.
The throttles could only move very, very slowly, always watching the temperature, always watching. And even in throttling back, you could bust it, even being very careful.