SR 3000/3

PROPELLER DIAMETER : 160cm, 170cm
APPLICATION: The SR 3000/3 is a three blade, electrical, in flight adjustable propeller of mixed construction, intended for the engines: Subaru EA 81, Rotax 912 UL, Rotax 912S, Rotax 914 and BMW. For possible use with any other engine type, email us.

The pitch angle of the blades is adjusted by means of an electrical servomotor, controlled from the cockpit, and it can be smoothly changed in the range from minimum angle valid for take-off up to the maximum angle. The system allows a range of adjustment of pitch angle of at least 20 degrees over the minimum angle (for example 10-30 degrees, or 14-34 degrees etc.)

Tractor/Pusher
The SR 3000 propeller can be used as a tractor or pusher.

The end positions of blade pitch adjustment are locked by two systems:
Main system:
The main system is an electrical one. It operates when the end stop on the blade comes into contact with the end switch and closes it, which terminates the motion of blade at this angle.
Back-up system:
To allow for the possibility of main system failure, the electric servomotor is provided with a duplicate end switch, for both fine and coarse end position.

Control
• Propeller control on the instrument panel
• Propeller control on the control column

Reversing and Constant Speed Controls

Reverse Thrust
As an option, an additional device may be installed in the cockpit which allows selection of negative propeller pitch settings and thus REVERSE thrust. This allows additional braking or backwards motion on the ground.

Feathering
Optionally, the propeller can be equipped with feathering function, enabling complete feathering of the propeller in flight.

Constant Speed
Optionally, the cockpit propeller control sy stem can be supplemented with an electronic governor MCS 3000. This enables the pilot to select the desired propeller RPM for climb and cruise phases of flight, and the regulator will then automatically adjust propeller pitch to maintain those RPM. In this case the propeller behaves as the constant speed propeller. A switch is installed on the instrument panel to allow selection of manual or automatic/constant speed control of the propeller.

Propeller Blade Construction:

Wood/Carbon (black) Blades With Plastic Leading Edge.
For propeller blades with wooden core and carbon fibre surface, the leading edges of the blades are cast from highly resistant plastic material that serves as protection against impact from sand, small stones, water and other matter which may damage propeller blades.

Wood/Composite (white) Blades With Plastic Leading Edge
For propeller blades with wooden core and glass-laminated surface in white or black colour, the leading edges of the blades are cast from highly resistant plastic material, which serves as protection against impact of sand, small stones, water and other matter which damage propeller blades.

Wood Blades With Composite Leading Edge.
Wooden propeller blades that are equipped with leading edges made of highly resistant composite material, serving as protection against impact of sand, small stones, water and other matter which damage propeller blades. The blade surface is protected with several spray coatings of very high quality and highly resistant polyurethane paint. The colour options are TRANSPARENT or WHITE.

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