The H.D. 40 has a compound structure in which metal has been used at stress points. It is powered by one BMW IV 460 H.P. engine.
The Heinkel commercial airplane, H.D. 40
1927-12-01
Miscellaneous
No indication
English
Engineering Index Backfile | 1929
The high-speed Heinkel He 70 mail airplane
TIBKAT | 1934
|Heinkel airplane H.D. 39 for carrying newspapers
NTRS | 1926
The High-speed Heinkel He 70 Mail Airplane
NTRS | 1934
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