Largest blades
12-21-2021, 09:19 PM
#6
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MT-Propeller, a natural composite propeller manufacturer, has received an FAA STC for the installation of a 3-blade hydraulically actuated constant speed propeller on Diamond DA42 twin engine aircraft.
The new propeller provides the DA42 with an enhanced ground roll and takeoff distance, as well as improved climb performance and smoother cruising.
The MT-Propeller can be installed on Diamond DA42, DA 42M, DA 42-NG, and DA 42 M-NG aircraft that use Technify Motors GmbH TAE 125-01, TAE 125-02-99, and TAE 125-02-144 engines or Austro Engine GmbH 4E-B.
Advantages of the new propeller installation include vibration damping characteristics, no engine modifications, reduced ground roll and takeoff distance, improved climb performance by 10%, and more speed.
The 3-blade propeller has an unlimited life and is FOD repairable.
The propeller installation is also certified by the EASA and TCCA Canada.
Source: Globalair.com
The new propeller provides the DA42 with an enhanced ground roll and takeoff distance, as well as improved climb performance and smoother cruising.
The MT-Propeller can be installed on Diamond DA42, DA 42M, DA 42-NG, and DA 42 M-NG aircraft that use Technify Motors GmbH TAE 125-01, TAE 125-02-99, and TAE 125-02-144 engines or Austro Engine GmbH 4E-B.
Advantages of the new propeller installation include vibration damping characteristics, no engine modifications, reduced ground roll and takeoff distance, improved climb performance by 10%, and more speed.
The 3-blade propeller has an unlimited life and is FOD repairable.
The propeller installation is also certified by the EASA and TCCA Canada.
Source: Globalair.com
12-21-2021, 09:21 PM
#7
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The most blades I've seen are 8 on the Mi-26. But the highest theoretical lifting efficiency is achieved with the fewest blades and experiments have been done with single blade rotors (with a counterweight - there were vibration problems that couldn't be resolved).
04-05-2022, 12:59 PM
#8
A lot of large scale helis have rotor disks starting at 3 mtrs, they normally use 1400mm blades.
Vario stuff goes up to 2.5 mtr, MAH (Russia) makes their blades.
M Blades in Germany make metal (extruded) blades up to 1500mm, yet they are closing down.
Spin Blades in Germany make up to 1600mm on special order.
The diameter of the rotor disk is also a combination of the blade length and of course the rotorhead dia.
You get most large blades out of the EU as there are more large scale builders.
Regards,
Vario stuff goes up to 2.5 mtr, MAH (Russia) makes their blades.
M Blades in Germany make metal (extruded) blades up to 1500mm, yet they are closing down.
Spin Blades in Germany make up to 1600mm on special order.
The diameter of the rotor disk is also a combination of the blade length and of course the rotorhead dia.
You get most large blades out of the EU as there are more large scale builders.
Regards,
