[Roger Gaemperle]

Hello Alessandro and Richard,



I cannot add anything to the first question as I don’t have the book here with me. But regarding the second one:



I guess you mean the auxiliary intakes for the generators. These were not used for cabin heating but supplied cooling air to the generators, which were located directly below these hatches (tubes delivered the air to the genos). When they tested more powerful generators later (after more and more electrical equipment was installed) they first had some cooling problems as the air massflow was too low. It might well be that originally no hatches were foreseen for the Me 262 and that Messerschmitt only installed the hatches after they experienced problems with overheated generators in the V-9 (I would have to check some of the flight test reports I have at home).



Regarding cabin heating: The cabin air was taken directly from one of the last compressor stages. A tube from the compressor to the multi-hole rack was always installed (but in most cases just closed with a temporary cover as it was not used) in the Jumo004 as it was already expected during its development that pressurized (hot) air might be needed later for either cabin pressurization or heating. The cabin heating was tested as early as in spring 1944 but progress was slow. During testing problems were that it got either too hot or that the circulation was not good enough to de-fog/de-ice the whole canopy. Therefore they tested several different designs and finally they found a satisfactory solution.



Tubes were installed that were connected to the multi-hole rack on the engine side and to a big filter in the cockpit behind the instrument panel (the NASM Me 262, for example, has these tubes and filters installed). There are several reports of problems with the cabin heating, which was retrofitted to existing Me 262 in a larger scale about from March 45 onwards. Some pilot didn’t realize that the heating could be adjusted stageless (the lever was on the lower right side of the instrument panel) and turned it either fully on or off. The result was that it got far to hot (this was also experienced by a British test pilot after the war).



That’s all I can tell you without crosschecking my documents and photos at home. If you have further questions please let me know.



Regards,

Roger Gaemperle