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- Helicopters: why hasnt NOTAR been more popular?
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
- How does the MD 900 accomplish auto rotation with the NOTAR system?
The MD-900 is a helicopter which seems to be quite popular with law enforcement agencies As you can see, instead of an anti-torque tail rotor, a fan exhaust is directed out slots in the tail boom
- How can a helicopter be designed without a tail rotor?
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 effect of the main rotor
- If a helicopters tail rotor fails, is it possible to perform an . . .
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 does a helicopter rudder work? - Aviation Stack Exchange
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
- What is the highest possible thrust generated by 15cm ducted fan?
I recently developed a sudden interest in flying I'm wondering whether a pair of small ducted fans could lift a person off the ground Lets say the ducted fan is 15cm in diameter What would be
- rotorcraft - Why does it take so long to stop the rotor of a helicopter . . .
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
- How does a helicopter rotor keep spinning in the same direction when . . .
@Bianfable I didn't have a problem understanding windmilling I just couldn't understand how it could rotate in the same direction when the wind was reversed, but not the pitch From the answers I got, it seems to be due to the upward slope of most of the underside of the blades when the pitch is low
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