by Horst Zoeller, 1996 - 2017, 63rd Edition, 8 December 2017

Junkers SA/SB Engines

Historical Data:
In Spring 1927
Junkers Motorenwerke Dessau presented the first truck and bus engine at the Leipzig Spring Fair. This was the first usable two stroke truck engine. The SA 9 was a two cylinder engine with 45hprs. An 8ßhprs midrange engine became available with the SA 12 and the SA 20 was a highend 105hprs engine for large trucks and locomotives.


SA 9 Truck Engine

The small SA9 engine was also modified for usage in smaller river boats, like police boats and ferries. This modified SA9 was designated SB 9. As the 45hprs SA9 engine became to small even for smaller trucks, it was further developed into the SA 19 later on.

In 1938 the SA-Series Production was stopped and a new engine family was introduced, of which the 2,7 was the previous SA 19 and the 4,1 followed the SA 12 engine design. An additional 5,4 was developed to fullfill the demands of the highend engine with 120hprs.


Technical Data:

Engine Norm Power
in hpr/kW
Turn Rate
rpm
Remarks
SA 9
SB 9
SA 12
SA 19
SA 20

2,7
4,1
5,4
45/33
40/29
80/59
55/40
105/77

60/44
90/66
120/88
.
.
1500
.
.

1600
1600
1600
2 Cylinder Truck and Bus Engine (1927)
Boat and Ferry Engine
3 Cylinder Truck and Bus Engine (4,1 since 1938)
Truck and Bus Engine (2,7 since 1938)
Truck, Bus and Train Engine

Truck and Bus Engine (1938, ex SA 19)
Truck and Bus Engine (1938, ex SA 12)
Heavy Truck and Train Engine

 

introduced Nov 1996, transfered 20 Nov 2017
http://hugojunkers.bplaced.net/
contents last updated 14 Aug 2004