MT-Propeller Entwicklung has received an FAA STC for the installation of the ‘Silent 7’ seven-blade propeller on the Piper PA46-600TP and Piper PA46-701TP powered by the Pratt & Whitney propeller turbines PT6A-42A in PA-46-600TP and PT6A-52 in PA-46-701TP.

This installation is already supplemental type certified by EASA.

VP Martin Albrecht says that the installation features the following advantages: shorter take-off distance by approximately -10 per cent (SL, ISA conditions); enhanced climb performance by approximately five per cent (SL, ISA conditions); cruise performance increased by two to three kts; significant inside and outside noise reductions; and compliance with the strict German noise regulations 2010 ‘Landeplatz Lärmschutz Verordnung’ for unrestricted airport operations in Germany and other European Countries.

The long-time proved MT-Propeller natural composite blades provide significant inside and outside noise reduction. They have no life limitation and are repairable in case of a FOD.

They also provide best vibration damping characteristics for almost vibration free propeller operation and have bonded on nickel alloy leading edges for superior erosion protection of the blades.