Jun 21, 2017 · NOTAR No tail rotor: use of a ducted fan within the helicopter's body, and venting the air through the side of the tail boom to get the desired anti-torque. One big advantage is simplicity and

Jan 1, 2015 · NOTAR : NOTAR - NO TAil Rotor uses a fan inside the boom to build a high volume of low-pressure air, which exits through two slots and creates a boundary layer flow of air along the tailboom utilizing the Coandă effect. The boundary layer changes the direction of airflow around the tailboom, creating thrust opposite the motion imparted to the fuselage by the torque …

Sep 16, 2015 · From Wikipedia: In 2010, based on the notion that Coandă invented the first jet, the centennial of the jet aircraft was celebrated in Romania. This aircraft was built by Henri Coandă, he of the effect that the NOTAR helicopter is based on. It was part of an aviation exposition in Paris, in 1910.

Dec 9, 2024 · If a minute makes a 0.1% difference, it's worth $10k per medevac under that high evaluation. A custom coaxial helicopter with rotor brakes will be on the upper side of the price range, but an extra million would pay off over 100 missions. Another cost would be noise: coaxials cannot be made as quiet as conventional designs with fenestrons or NOTAR.

Sep 28, 2015 · In the event of a total failure of the tail rotor, is it possible to maneuver a helicopter to an emergency landing spot that is within, say, 30 minutes flying time? What are the maneuvers require...

How are Fenestrons (or fantails) able to reduce the tip vortex losses in a helicopter?

Oct 17, 2024 · As explained in this video(@3:22) by PilotYellow, a Fenestron tail rotor spins 10x faster than the main rotor while a traditional tail rotor only spins 6x faster. Why there is so much difference? A...

Nov 5, 2015 · The NOTAR used a method similar to the tail rotor, by varying the thrust. In case of tandem rotors (like Chinook) , the yaw control is obtained by differential lateral cyclic.

Dec 16, 2015 · The Canard rotor/wing demonstrator, later called the X-50 Dragonfly was a Stop-Rotor Rotary Wing Aircraft made by Boeing and DARPA to demonstrate the principle that a helicopter's rotor could be stopped in flight and act as a fixed wing (like in movie The Sixth Day). Image from boeing.com The canard is used in case of Boeing X-50 Dragonfly in order to …

Jul 22, 2019 · John K and Koyovis 's answers are both correct. However, as a former pilot of the UH-60 and a mechanical engineer here is a simpler version. A helicopter must be balanced. If the front is much heavier than the tail, then it can't fly safely as the nose is too low. If the tail it too heavy, then the same. The point of balance is called the center of gravity. The tail boom on a …