Ronald Valentine Engines

The finest miniature engines in the world

IMO Primus
1961 IMO Primus 1.0cc Diesel Engine


Technical Data:


Bore                              10.3 mm
Stroke                           11.8 mm
Rpm                          15,000 rpm
Power                           0.11 Hp
Total combustion          0.98 cc
Weight                             65 g
Intake                              front



E. K. Junginger designed the IMO Primus for free flight competition and the IMO Champion 2.5cc for team racing.


IMO Technik-Oberursel Taunus

IMO Primus 1cc Diesel Engine

1961 IMO Primus 1.0cc

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