Though the tachometer used on the early Me262 (Jumo 004 engines) had an indicator that displayed 0 – 12000 rpm (14000 rpm on later models), it was really only accurate from to 9000 rpm. As such, at lower speeds, with the help of a a push button switch that was installed on the side console, the pilot was able to take a reading from the Doppeldruckanseiger (Fl.20233) that gave him a low-speed reading from the Riedelanlassmotor or the engine itself.
Once the starter motor bright the engine to 2000 rpm, the engine was started, and the speed indicator switched to the encoder on the engine.
On the Me109 and Fw190, it installed like a regular tach generator, with the 2nd connection being unused.
Made of steel, aluminum and bakelite, this instrument is in AMAZING used condition, and retains most of its original finish! It is 100% functional and the Fl. label is clearly stamped into the housing, indicating, Fl. 20230. Still retains much of the original grease and wear…and comes complete on the original mount. I have shown this exact type installed on the Jumo 004 Turbo jet engine in the last photo. Would make an EXCELLENT addition to any collection, restoration, or display!
Please email me if you need additional photos or information.
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