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Three-blade prop for Piper 28 and

MT Propeller receives supplemental type certificates

MT-Propeller Entwicklung GmbH has received the FAA STC SA04463NY for the next generation composite 3-blade propeller MTV-9-B/198-52 on the Piper PA-28-236 Dakota with the engine IO-540-J3A5D. This installation is already certified by EASA STC 10062339.



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.

According to MT-Propeller Vice President Martin Albrecht the installation features the following advantages:

• Enhanced climb performance by approx. 5 % (MTOW, SL, ISA conditions)
• Enhanced cruise performance by 2 to 3 kts (MTOW, ISA conditions)
• Unlimited blade life
• Fullfills the highest noise requirements for unlimited flying

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

In a further press release, MT-Propeller Entwicklung GmbH has also informed AEROMARKT about “The Silent 7”, a seven-bladed propeller having now been supplemental type certified on the Pilatus PC-12 powered by a Pratt & Whitney PT6A-67B or PT6A-67P propeller turbine.

(PT6A-67P Engine Installation according to EASA STC 10065179 (FAA STC SA02266LA) only applicable in EASA region).

As per an updated MT-Propeller press release dated April 2021 the world's first 7-bladed Propeller for General Aviation is now also 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. (PT6A-67P Engine Installation according to EASA STC 10065179 (FAA STC SA02266LA).



“The Silent 7” - the World's first 7-bladed Propeller for General Aviation has now been supplemental type certified on the Pilatus PC-12 bx , both EASA and FAA

When starting developing “The Silent 7”, the world's first 7-bladed propeller for general aviation in 2016 MT-Propeller had the same vision like in year 1999 when they came up with the first 5-bladed prop for turbo props. The 5-bladed prop became an industrial standard with more than 2.500 propeller sold for various kinds of turbo props and it is still an ongoing success story. The 7-bladed propeller “The Silent 7” is pushing the new limits for certain applications to go beyond the achievement of the 5-bladed propellers.

The FAA STC is in progress.

MT-Propeller Vice President Martin Albrecht says that the installation of the “The Silent 7”, the brand new 7-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 approx. 10%; AFMS amended
• Certified Take-off distance over 50 ft obstacle reduced by approx. 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 6 to 7 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 7-bladed “Silent 7” for the Pilatus PC-12 has more ground clearance for less blade tip erosion and FODs. 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.

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.

About MT-Propeller

MT-Propeller is the world leading natural composite propeller manufacturer with 30 certified propeller models from 2-blade to 7-blade hydraulically controlled variable pitch propeller, for engines producing up to 5000hp, and 2-blade to 4-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 they are also supplemental type certified on Part 25 aircraft.

MT-Propeller is holder of over 220 STCs worldwide and 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 80,000 blades are in service. 150 Million fleet hours where already performed on MT-Propellers.

A factory certified network of 62 service centers, provides best service and maintenance all over the world.

MT-PROPELLER Entwicklung GmbH
Airport Straubing-Wallmuehle
D-94348 Atting - Germany
phone: +49-(0)9429-9409-0
fax: +49-(0)9429-8432
sales@mt-propeller.com
www.mt-propeller.com
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