AutoProp
Autoprop Self-pitching Feathering Propeller
Automatic Self Pitching
Autoprop self pitching feathering propeller enables less RPM to be used to produce comparable or better thrust and boat speed, and faster boat speed with less RPM. Autoprop allows increased range under power … up to 30% fuel savings and a quieter engine at lower RPM with less vibration and wear. You will experience enhanced performance in rough seas as the engine does not overload with more thrust to punch through the waves.
Same Blade Shape in Reverse
The Autoprop feathering blades swing thru 180 degrees into reverse which presents the same propeller shape and leading edge as in forward. This produces more predictable handling and stopping power is dramatically improved. In almost every case the Autoprop eliminates prop walk in reverse and cavitation is eliminated.
Low Drag
The Autoprop blades align themselves to the water flow when under sail. This reduces sailing drag by up to 85% compared to a 3-bladed fixed propeller of same diameter and blade area. Feathering to the water flow rather than the shaft angle reduces drag still further on steeply angled shaft installation.
Reduce Sailing Drag Up to 85%
30% Fuel Savings
Benefits of Autoprop Propellers
- The only fully automatic self-pitching propeller available.
- The Autoprop had a maximum efficiency of 70% … Higher than all other props tested – Fixed, Folding or Feathering.
- Blades are true profiles (aerofoil), not flat (planar) blades like all other feathering propellers. Therefore greater thrust is developed in both forward and reverse at all engine rpms.
- In reverse, a true blade profile is in effect. No cavitation, greater stopping power and control, improved handling, almost no prop walk.
See the Autoprop underwater
Unique Autoprop Features
Sailing Mode
The feathered image above shows how, when sailing, Autoprop reduces drag by up to 85% compared with a three blade fixed propeller. With the two blade propeller the reduction can be even greater. This drag reduction can equate to as much as one additional knot in sailing speed.
Ahead Mode
Autoprop automatically varies its pitch depending on the conditions. As the wind or sea conditions vary, so does the blade pitch. The result is maximum efficiency whatever the conditions, with increased speeds at lower engine RPMs and lower fuel consumption and emissions.
Astern Mode
In reverse the Autoprop blades swing through 180 degrees and present exactly the same blade shape as they do ahead. The result is the same excellent thrust with greater stopping power and less prop walk.
Quality Construction
All propellers sold by AB Marine are manufactured from NIBRAL, a metal alloy made of nickel, aluminum and bronze. NIBRAL is far stronger in all specification areas than manganese bronze (commonly used by other prop manufacturers).
+45%
Tensile Strength
+27%
Impact Strength
+50%
Fatigue Strength
+50%
0.2% Proof Strength
+85%
Cavitation Erosion Resistance
+85%
Corrosion Resistance
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