CAMDRIVE 200 PSRU

Propeller Speed Reduction Unit

DESIGN CRITERIA

When laying out the specifications for a Propeller Speed Reduction Unit several basic functions must be provided for in the design. The CAMDRIVE 200 is fitted to both the CAM 100 and the CAM 125 engines. The following points in simple form are the main items which were to be considered.

1. Reliability

2. Dependability

3. Matched Ratio to engine Power Curve

4. Ruggedness to handle Power Output

5. Isolation of the Propeller from the Crankshaft

6. Axial accuracy and stability under all Power Transmission Loads

The input sprocket it attached to the flywheel through a torque plate. The radial loads are taken by the lower bearing (3) and axial stability is provided through the torque plate. The rigidity of the housing must be sufficient to prevent and distortion resulting from torque or gyroscopic precession loads.

The major radial and thrust loads are taken through the double row axial/radial ball bearings (2) while axial stability is provided for by the nose cone ball bearing (1).

It is imperative that the sprockets remain in precise alignment at all times and under all loads. The choice of components is critical, but none is more important that the integrity and rigidity of housing.

The CAMDRIVE 200 has proven itself to be a heavy duty Redrive with ten years of service in the field. Design specifications and rugged components have proved their worth.