Our hydraulic variable pitch propellers were introduced to the market in 1983 and are less complex and lighter than common designs with the fact, that the cylinder and piston are integrated in the shank of the propeller hub.
In production are certified 2-, 3-, 4-, 5- and 6-blade models for engines producing
up to 5000 hp, that have an hydraulic oil supply to the propeller controlled by a governor.
All hydraulic MT-Propellers are optionally available with our patented feathering and/or reverse system and can optionally be equipped with electric or alcohol de-ice boots.

Propellers with reverse thrust are preferred for both land planes, where they decrease the landing distance and for seaplanes, where they offer better maneuverability.
In the 1990s MT-Propeller has designed, certified and patented an innovative hydraulic reversing propeller system for piston engines, which can be used with any number of blades. There is no mechanical linkage between the rotating propeller and a fixed control unit (beta-valve) like the common system of the PT6, TPE-331 and the C250B17. Instead of the beta-valve, MT-Propeller uses a dual pressure governor and a dual piston propeller system.

Extra 500 with a reversible MT-Propeller First certified electric constant speed propeller
on the motorglider 'Valentin Taifun'

The electric variable pitch propellers were introduced to the market in 1985 and have initially been developed for motorgliders as a substitute of the 3 position mechanic variable pitch propeller with feathering capability.
In the early days there was just a simple manual pitch control, but later the system has been upgraded with full constant speed capability, which makes it suitable for regular aircrafts and engines producing up to 350 hp. Presently 2-, 3- and 4-blade versions are in production. Feathering capability can be integrated optionally, reverse capability can be integrated for the use on airships, only.
ELCOPROP® is the only certified Electric Constant Speed Propeller available worldwide and is patented in the U.S. and Germany. Several STC's are available.

Page 1 2 3

(Please report any bugs or suggestions to: support@mt-propeller.com )