Press Release

Issued by MT-Propeller .

February 22, 2009

From the very beginning MT-Propeller has been focused on the development of aircraft propellers that would provide more performance in addition to a high reduction of the noise level in order to comply with the enhanced environmental protection laws.

The selection of the renewable raw material wood for building propeller blades has made it possible to reduce the weight to a point that i.e. 2 blade metal propellers can be replaced by 3 blade MT-Propellers, basically without affecting the aircraft's weight and balance. By adding one more blade a smaller propeller diameter can be selected, which again reduces the noise level usually without any decrease in the performance.

The implementation of the finite element calculation method for the blade design and production on CAD/CAM systems is another technology benefit and allows the integration of new more efficient aerodynamic profiles.

Another advantage of using wood as a basic material is the improved dampening characteristic, that positively affects the harmonics and noise emission inside and outside the aircraft.

MT-Propeller owns presently more than 90 STCs worldwide, which also include propeller turbine powered aircraft like i.e. the Cessna Caravan, Dornier DO228, Shorts SC-7, Pilatus PC12, Piper PA42-1000, PAC-750 as well as many other applications, that benefit from the noise level

reduction by installing an MT-Propeller.

The recently added STC for the installation of the 5-blade propeller MTV-27 on the Metro III und Merlin IVC (M7 Aerospace SA227-AC, -AT) aircraft has allowed MT-Propeller to introduce a noise reduction kit with enhanced performance for regional airliners.