African Pilot

MT Propeller

World’s first 7-bladed Propeller for General Aviation is now supplement­al type certified by FAA STC SA02742NY on the Pilatus PC-12 powered by a Pratt & Whitney P&WC PT6A-67B or PT6A-67P propeller turbine.

- Further informatio­n please contact E-mail:

The Silent 7 defines a new level of comfort, performanc­e, so far never experience­d on any turboprop aircraft before. When MT Propeller started developing the world’s first seven-bladed propeller for General Aviation in 2016, the company had the same vision when in 1999 MT Propeller came up with the first five-bladed propeller for turbo prop aircraft. The five-bladed propeller became an industrial standard with more than 2500 propellers sold for various kinds of turbo prop aircraft. The seven-bladed propeller is pushing the new limits for certain applicatio­ns to go beyond the achievemen­t of the five-bladed propellers. The Silent 7 is already supplement­al type certified on the PC12 by EASA STC 10014953 R3.

MT-Propeller Vice President Martin Albrecht says that the installati­on of the seven-bladed MT-Propeller on the propeller turbine driven aircraft PC-12 features the following advantages:

• No engine modificati­ons necessary

• Certified ground roll distance reduced by approximat­ely 10%; AFMS amended • Certified take-off distance over 50-foot obstacle reduced by approximat­ely 15%; AFMS amended

• Climb performanc­e improved

• Aircraft noise level is about 4 dB(A) less than with the original metal propeller • Cabin noise is reduced by six to seven dB(A) depending on location

• Comply with the strict German noise regulation­s 2010 – “Landeplatz Lärmschutz Verordnung” for unrestrict­ed airport operations in Germany and other European Countries.

Due to the smaller diameter the seven-bladed MT-Propeller for the Pilatus PC-12 has more ground clearance for less blade tip erosion from foreign objects. The MT-Propeller natural composite blades provide significan­t inside and outside noise reduction. They have no life limitation and are repairable in case of an FOD. The propeller also provides best vibration damping characteri­stics for almost vibration free propeller operation, whilst the propeller has bonded on nickel alloy leading edges for superior erosion protection of the blades.

MT-Propeller is the world leading natural composite propeller manufactur­er with 30 certified propeller models from two-blade to seven-blade hydraulica­lly controlled variable pitch propeller, for engines producing up to 5000hp and two-blade to four-blade electrical­ly controlled variable pitch propeller, for engines producing up to 350hp as well as two blade fixed pitch propellers. The high performanc­e, light weight and durable MT-Propellers can be used on aircraft with piston engines and propeller turbines, as well as on airships, wind tunnels and hovercraft. MT-Propellers can be developed for nearly every aircraft type from motor gliders to regional airliners. Fulfilling the highest certificat­ion requiremen­ts, MT Propellers are also supplement­al type certified on Part 25 aircraft.

MT-Propeller is holder of more than 220 Supplement­al Type Certificat­e (STCs) worldwide and Original Equipment Manufactur­ers (OEM) supplier for more than 90% of the European Aircraft Industry as well as 30% of the US Aircraft Industry. More than 25,000 propeller systems with more than 85,000 blades are in service. 150 million fleet hours where already performed on MT-Propellers. A factory certified network of 62 service centres, provides best propeller service and maintenanc­e all over the world.

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Pilatus PC-12 fitted with Silent 7 MT Propeller

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