By engaging the twin-brothers Siegfried and Walter Günter a new era of aerodynamics broke out at Heinkel, with the sports- aeroplane Heinkel 64 as the first manifestation.
The Günter Brothers, already wellknown about their sports-aeroplane ‘Bäumer Aero Sausewind’, took a similar effort in the details and aerodynamic honing of the Heinkel 64. It is therefore not by chance, that there exists a certain similarity between the two aeroplanes.
Walter Guenter 
Siegfried Guenter 
Karl Schwärzler
Sports-aeroplanes and their contests became increasingly popular in Germany – the development was vehement. Whereas the average speeds in the international tourist plane contest 1930 were about 170 km/h, they reached already over 200 km/h in 1932; the Messerschmitt M29 reached a top speed of 268 km/h during the preparations to the contest. In the contest, the Heinkel as the fastest aeroplane scored 241km/h
List of the aeroplanes built (Click on Werknummer or Registrierung for details)
| Flug-zeug | Werk nummer | Regis-trierung | Regis-trierung Wettbewerb | Pilot im Wettbewerb |
| He64a | 404 | D-2258 | Oskar Notz tot. | |
| He64b | 409 | D-2260 | A9 | Seidemann/Witt |
| He64c | 423 | D-2303 | A6 | Massenbach/Scholz |
| He64c | 424 | D-2304 | C6 | Morzik/Dempewolf |
| He64c | 425 | D-2301 | B1 | v. Cramon/Dübwart |
| He64c | 426 | D-2302 | A8 | Stein/Aumann |
| He64c | 427 | D-2305 | E2 | Junck/Beese |
In the specification sheet, published by E. Heinkel, the He 64 looks as follows:
Interesting the glitch the retoucher made in the picture on the upper left side: Compare the registration on the left wing to the right wing.