Darglow Max-Prop Propellers
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Italian Max-Prop range. 2, 3, 4 & 5 blade automatic self-feathering low drag propellers
Darglow is pleased to be UK distributor for Max-Prop, low drag propellers. Since starting production in the 1970’s Max-Prop has proven itself on racing and cruising boats around the world. With over 65,000 propellers in the water, the Max-Prop is tested daily in the harshest conditions and has established itself as a world-leading propeller suitable for use on the smallest to largest yachts. The combination of low drag, outstanding reverse power, efficient forward performance and fail safe design makes Max-Prop the ideal Sailboat propeller on the market today. Now with the introduction of the ECOWIND, Max-Prop has taken a revolutionary step forward in the propulsion of sailboats.
Features
LOW DRAG:
Under sail the Max-Prop will increase sailing speed by about 15%, the largest difference being noticed when sailing in light airs. When sailing with a fixed propeller the vessel has to overcome the fixed blade drag, installing a Max-Prop maximizes sailing performance.
RELIABILITY:
Max-Prop uses a “differential” type design so all blades open in unison in forward or reverse. The extraordinary reliability has made it an overwhelming choice for long range cruisers.
GREAT REVERSE:
The Max-Prop provides 80% greater reverse power than a comparable fixed blade propeller. In reverse the blades rotate 180° in 3/4 turn of the shaft giving the Prop the same efficiency in reverse as in forward.
ADJUSTABILITY:
The pitch is adjustable on all Max-Props. This allows you to optimize the propeller pitch to the engine to achieve maximum efficiency.
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Classic 2 and 3 blade
| Ecowind 4 blade
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Variable Pitch VP 3 and 4 blade
| Saildrive
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2 Blade Classic Max-Prop Instruction Manual
3 Blade Classic Max-Prop Instruction Manual
3 Blade VP Max-Prop Instruction Manual
Easy Max-Prop Instruction Manual
Fast Generation 2 Max-Prop Instruction Manual
Low RPM Max-Prop Instruction Manual (Coming Soon)
Removing a Max-Prop 3 Blade Instruction Sheet
Pitch Change
The pitch on a Max-Prop changes according to the diameter of the propeller and the blades rotation angle.the table below shows the pitches in millimeters corresponding to the degree of blades angle for a given propeller diameter.
Propeller Diameter (millimeters) | ||||||||||||
300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 750 | 800 | ||
Blades Inclination Angle | 10° | 100 | 115 | 130 | 150 | 170 | 185 | 200 | 215 | 230 | 250 | 265 |
12° | 120 | 140 | 160 | 180 | 200 | 220 | 240 | 260 | 280 | 300 | 320 | |
14° | 140 | 165 | 190 | 210 | 235 | 260 | 280 | 305 | 330 | 350 | 375 | |
16° | 160 | 190 | 215 | 245 | 270 | 300 | 325 | 350 | 380 | 405 | 430 | |
18° | 180 | 215 | 245 | 275 | 305 | 335 | 365 | 400 | 430 | 460 | 490 | |
20° | 205 | 240 | 275 | 310 | 345 | 375 | 410 | 445 | 480 | 515 | 550 | |
22° | 230 | 265 | 305 | 340 | 380 | 420 | 455 | 495 | 535 | 570 | 610 | |
24° | 250 | 295 | 335 | 375 | 420 | 460 | 505 | 454 | 585 | 630 | 670 | |
26° | 275 | 320 | 370 | 415 | 460 | 505 | 550 | 590 | 645 | 690 | 735 | |
28° | 300 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 750 | 800 | |
30° | 325 | 380 | 435 | 490 | 545 | 600 | 655 | 705 | 760 | 815 | 870 | |
Pitch (millimeters) |
Diameter and pitch calculation
Diameter and pitch must be calculated as if Max-Prop were a normal fixed propeller. Max-Prop offers the great advantage of pitch adjustability in order to optimise the performance of the propeller. Reducing the blade angle αf the propeller does not reach the desired RPM; increasing the blade angle α if, on the contrary, the engine exceeds the desired RPM. A two degrees change in blade angle will change the engine RPM by about 15%, at the same boat speed. The adjustment of angle α and therefore pitch, is done when the propeller is assembled on the shaft. To obtain the different angles you have to follow the assembly instruction.