Installation (all)
Parts:
Model H5
Model H5BB
Model H6
Model H9
Model H62
Saildrive

TEST RESULTS

"Figures Speak for Themselves"

DRAG

To determine the relative drag of the Autoprop, trials were carried out against other dimensionally comparable sailboat propellers. The results are clearly shown on the graph opposite.

It can be seen, when compared to a three bladed fixed pitch propeller, that the Autoprop reduced drag when sailing by up to 85%.

An additional feature of the Autoprop is that its blades always offer the least resistance irrespective of the angle of the propeller shaft


THRUST

"In Comparative Trials, drag measured was reduced by up to 85%"

To determine the characteristics of the Autoprop under power, a thirty-five foot sailboat was fitted with a number of different propellers, including an Autoprop. Each propeller was designed according to the same parameters, in order that a directly comparable result would be achieved. The results from these trials are clearly illustrated opposite.

It can be seen that in all instances, the Autoprop out-performed the other propellers. Only the Autoprop consistently achieved higher boat speeds at lower revolutions than other propellers, hence offering potentially increased cruising range under power.

An additional feature of the Autoprop is that when motoring in adverse conditions, the blades can automatically reduce and optimize pitch, minimizing engine overload and resulting in power being available when it is most needed.

CRASH STOP

When engaging astern gear, the AUTOPROP takes only one revolution of the shaft for the blades to take up the new position. The crash stop demonstrates how effectively the Autoprop responds to throttle control.