Hermann Haacke of Johannisthal, Berlin, Germany built several aircraft engine models of various configurations; e.g., fan-type and radial. The following two HOAE were developed after WWI.
O-170 -- {4.409 / 5.512 / 168.3} / {112 / 140 / 2759}
Same stroke as O-195.
2cyl; N/A; 28hp@1300rpm; 1919-1927; Wt = N/A.
Ae39; S.
Applications: (Germany) Messerschmitt early monoplane.
O-195 -- {4.724 / 5.512 / 193.3} / {120 / 140 / 3167}
Same stroke as O-170.
2cyl; HFM 2; 28-35hp@N/A rpm; 1919-1927; Wt = 132#.
AAW 2/21/19, Vol.12, p.612; Ae39; JBC; S; SA3/79 (Rieseler application).
Applications: (Germany) Messerschmitt early monoplane; Rieseler R III parasol monoplane (one built in Sweden as [S-AAR] by F. Bendel in 1922). (Poland) D.K.D. 1; Gabriel P5; Silesia S-3, S-4.