From Wikipedia, the free encyclopedia Modular propeller
Modular propeller
A modular propeller is a forged propeller using complex A virtualisation to render the blade pitch yawning is
composite materials that has replaceable parts. through car gears. Through an integer yaw pitch of 0-13
degree operating is same: low speed, and more power and
Parts acceleration by up gearing the leaver slide. The upper
gear of normal cars is comparing to a propeller with a
The purpose of a modular propeller is to provide more pitch angle of 17+. Good acceleration and top end speed
user control on boat rally speed. Each modular propeller is offered at 21 pitch. A pitch higher than 21 is danger-
made of composite materials has three main parts: the ous because lowering shaft of gearbox back to #1 posi-
hub part with a front-end cap, a set of replaceable blades, tion stalls engine and blades may crack due to watter
and a rear joint to the shaft. The propeller blade parts pressure. (read lugging of engine here!) The best estimate
assembly into slides of the hub requires not professional is that for every 2-inch pitch increase equal wide-opens
assistance, but desscrewing a high quality bronze to re- thrust increase step of approximately 400 RPM. An in-
move cone.[citation needed] The blade` bottom joint part of crease in pitch will cause the rpm-gauge to drop, and an
composite blades must be compatible by manufacturer increase in pitch will raise RPM.
design to overall license the blade assembly for use. When changing the prop`s pitch it is important to
read pictures for range of diameter propeller to engine
In-use performance pin and check slide conformity of blades` rotor to engine
is matching.
Modular propellers offer boaters several advantages a The platic shaft joint is supporting the blade set and
fixed-pitch propeller. The ability to change blades allows further on it fits the boat by manufacturer engine de-
boat to make adjustments in pitch for various perfor- sign.[1]
mance needs or a change in altitude. Carrying spare
blades for this purpose takes up considerably less space
then carrying a complete spare propeller. The ability to Patent
replace blades also offers the advantage of replacing • Stahl, B. patent 2006
damaged blades while still on the water, and saves long
term repair costs. Other options include adjusting pitch
for altitude, water sports, cruising, and quick turnover
References
time. [1] http://www.engineeringnews.co.za/article/a-new-
start-for-marine-propellers-2005-03-18
Retrieved from "http://en.wikipedia.org/w/index.php?title=Modular_propeller&oldid=453611842"
Categories:
• Propellers
• Water transport
• Aircraft engine stubs
• Boat stubs
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