GENERAL INFO



A Max-Prop feathers to a low drag shape. Compared to a folding propeller, the extra wetted surface of the Max-Prop blades is offset by the reduction of projected area: A. Available in two & three blades."



A folding propeller provides a low drag. The drag is directly proportional to the projected area: A. Available only in two blades.


A fixed blade propeller induces a tremendous amount of drag, reducing the boats speed an average of 15%




The torque of the prop shaft acting on the "differential" type design will open the blades in unison to the pre-seit pitch at any throttle setting. This will provide maximum efficiency (96% of same size fixed prop) plus eliminates the vibration problems of a folding prop.



The blades will "slam" open and, if not perfectly aligned or true to each other, will cause vibration.



A fixed blade propeller provides maximum efficiency as long as the pitch is correct.

 

As in forward, the torque of the shaft will rotate the blades 180 degrees in less than 3/4 of a shaft rotation, presenting the same leading edge and pitch in reverse. This provides better directional control and 80% greater power than a comparable fixed blade propeller.



In that the blades will not open to the maximum diameter (and occasionally not at all), the reverse power is very poor (much less than a fixed blade prop).

 

A fixed blade propeller works with the trailing edge as a leading edge, reducing its efficiency by 50%..

MORE INFO

One of the most important feature of the Max-Prop is that it feathers automatically with the forward momentum of the boat. Once feathered, it provides the least possible drag (similar to a folding prop) improving the vessel's sailing speed by an average of 15% above a conventional fixed blade propeller.

The Max-Prop uses a "differential" type design so that the blades cannot fail to open in forward or reverse. This positive system eliminates the problems associated with a folding propeller and its use of centrifugal force to open the blades. In a recent survey of Seven Seas Cruising Association readers the Max-Prop received a perfect rating of no failures (one of only two products to receive such high praise).

About 30,000 Max-Prop are in operation today!

The Max-Prop will fit directly onto your existing shaft when the boat is hauled for installation. The Max-Prop will be matched to your specific shaft taper and can even be fitted on a Sail-Drive unit. The only required maintenance is to grease the propeller at least once every  year (all the new Max-Props are fitted with grease fittings).

In forward: the Max-Prop will offer 96% of the efficiency of a fixed blade propeller of the same diameter and pitch. The 4% loss in power can usually be eliminated by precisely matching the pitch of the Max-Prop to fit the boat and engine combination.

In reverse: the Max-Prop provides 90% more power than a comparable fixed blade propeller. The Max-Prop utilizes the same leading edge in forward as it does in reverse giving the propeller the same thrust in both directions, whereas on a fixed blade propeller in reverse the trailing edge becomes the leading edge therefore reducing its efficiency by 50%.

The Max-Prop offers the possibility of pitch adjustment. Changing the pitch is very simple; it is done by changing the setting of the gear inside the propeller (usually upon a haul out). The ability to adjust the pitch will help achieve the maximum efficiency from the engine without having to purchase a new propeller. On the new FAST "V.P." model the pitch is ad

Worldwide, about 70% of the top racing boats have opted for the Max-Prop solution.

The two or the three blade Max-Prop is the propeller of choice for the cruising sailor. The combination of low drag, increased speed, outstanding backing power, safety and maneuvering, and fail safe design makes the Max-Prop the ideal cruising propeller.