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MAX PROP FOLDING PROP FIXED BLADE UNDER SAIL... A Max Prop feathers to a low drag shape. Comparedto a folding propeller, the extra wetted surface of theMax-Prop blades is offset by the reduction of
projected area: A. Available in two & three blades. UNDER SAIL... A folding propeller provides a low drag. The drag isdirectly proportional to the projected area: A. UNDER SAIL... A fixed blade propeller induces a tremendous amount
of drag reducing the boats speed an average of 15%. IN FORWARD... The torque of the prop shaft acting on the “differential”
type design will open the blades in unison to thepre-seat pitch at any throttle setting. This will providemaximum efficiency (96% of same size fixed prop) plus
eliminates the vibration problems of a folding prop. IN FORWARD... IN FORWARD... 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. IN REVERSE... 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 bladepropeller. IN REVERSE... IN REVERSE... 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%. DRAG RELIABILITY INSTALLATION AND
MAINTENANCE One of the most important feature of theMax 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. 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 every other year (all the Max Props are
fitted with grease fittings). VERSATILITY EFFICIENCY The Max Prop offers the possibility of pitch
adjustment without external controls.
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 marine engine
without having to purchase a new propeller.
On the fast model the pitch is adjustable
externally. 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 theboat 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 foward 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%. RACING Worldwide, about 70% of the top racing
boats have opted for the Max Prop solution. CRUISING 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.
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