Congratulations on your propeller purchase from
Whirl Wind Aviation!
To ensure many hours of trouble free operation of your new Whirl
Wind propeller please read and follow the operation and
maintenance recommendations in this manual.
The Whirl Wind 400A Series propeller is a composite constant speed
hydraulically controlled propeller. This fully constant speed propeller
will automatically adjust blade pitch angle to maintain the selected
engine RPM setting. A single acting piston (inside the hub) powered
by engine oil changes the blade pitch. Oil pressure is adjusted and
regulated by the engine driven governor. Once an engine RPM is
selected, it will be held constant at all flight airspeeds and power
settings by the governor automatically.
The propeller control lever is used to set the desired engine RPM.
Once the engine RPM is set, it is held constant by the governor,
which maintains this preset RPM by varying the propeller oil
pressure automatically. Mechanical stops for high and low pitch limit
the pitch change travel of the propeller.
Whirl Wind propellers are experimental class and are not subject to any
Federal Aviation Administration regulations. The o
perator acknowledges that
these are experimental propellers and agrees to assume all risk in operating
them on an experimental aircraft or any other machine. Any and all
information in the owner’s manual, service letters and other documentation
are suggestions only and may not apply to an operator’s specific application.
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Section
1
Section 1: Introduction
