Ronald Valentine Engines

The finest miniature engines in the world

Profi Prototype
1972 Profi 60 R/C

Technical Data:

Bore                         24.0 mm
Stroke                      22.0 mm
Rpm                          12,800 rpm
Power                         2.25 Hp
Total combustion       9.98 cc
Weight                      130 gram
Intake                       Front disc

This 60 size Profi prototype is a very interesting engine. The intake is controlled over a front disc valve.

Profi Prototype

Hans Hoernlein's Profi Prototype

Profi 60 / 10.0 cc

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