MT-Propeller Entwicklung has received FAA STC for the installation of its MTV-27-1 Quiet Fan Jet composite propeller on Beech 1900, 1900C and 1900D models powered by Pratt & Whitney PT6A-65B or -67D propeller turbine engines. This installation is already supplemental type certified by EASA and TCCA.

MT-Propeller president Gerd Muehlbauer states that the installation features the following advantages compared to the original four-blade propellers: “The five-blade MT-Propeller has a smaller diameter of about eight inches compared to the original four-blade propeller, which means greater ground clearance of about four inches for less FOD and also more clearance to the fuselage and therefore less cabin noise from the prop tips. Take-off of the Beech 1900 is improved by four per cent, so compared to the original AFM a higher safety for the calculated take-off run. The MTV-27 has no propeller ADs, and the five-blade MT-Propeller reduces propeller noise by up to 5 dB(A). The MTV-27 also has bonded on wide chord nickel alloy leading edges for superior erosion protection of the blades.

“TBO for the MT-Propeller is 4,500 hours or six years, whatever comes first, for low maintenance costs. No intermediate inspections are needed between the TBO which requires the propeller removal. This comes with reduced costs for spare parts, like blades and lower overhaul costs, for the complete propeller assembly, and there is no RPM restriction for the complete operational range.”