Below; Oranienburg, 30 March 1939 - 24-year old pilot and 'Rekordflieger' Hans Dieterle alongside his wife has just attained a timed speed of 746 km/h with the (so-called) 'He 112 U' to achieve a World speed record. ( the 'U' may have stood for 'Udet' - who had test-flown some of the earlier He 100/112 'variants' during 1938). The aircraft was in actual fact the He 100 V8 coded D-IDGH with 'cut-down' windshield and canopy, powered by a modified DB 601 with methyl alcohol injection to produce around 1800 hp for a very short period. The aircraft covered the 3 km long Fédération Aéronautique Internationale (FAI) measured 'course' in just 14 seconds! Dieterle’s new record - 'schnellster Mann der Welt' -would last less than one month, however. On 26 April 1939, Fritz Wendel achieved 755 km/h (around 470 mph) in the Me 209, although some have argued that as this flight had taken place in Augsburg - which was much higher above sea level than allowed in FAI regulations- Wendel's record was invalid.
Bundesarchiv caption - " World records being “processed” - the two pilots of the twin-engine Heinkel aircraft, Flugkapitän Nitschke (left) and Pilot Dieterle (right), who on Monday set three world speed records over 1,000 km for Germany, together with the designer of the Heinkel aircraft, Dr. Ernst Heinkel (centre), with whom they are discussing their experiences on the record-breaking flight, November 23, 1937 .."









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