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- 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
- How does a helicopter rotor keep spinning in the same direction when . . .
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- How does a helicopter rudder work? - Aviation Stack Exchange
In case of helicopters without a tail rotor, the yaw control is obtained in different ways 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 Source: tech-mp com
- rotorcraft - Why does it take so long to stop the rotor of a helicopter . . .
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
- aircraft design - What would be the advantages and drawbacks of a . . .
$\begingroup$ @Eth I agree with Federico's point here because as it stands you are vaguely describing a non-existent aircraft and asking what the pros and cons would be in operation (never mind development), without defining the design to be at least believable
- Why does a Fenestron tail rotor require so much speed compared to an . . .
Propellers and rotors create thrust by accelerating the air that passes through them A smaller rotor blows a small amount of air at high speed, a large one blows a large amount of air at low speed, but the force (or momentum change) is the same
- What is the highest possible thrust generated by 15cm ducted fan?
A 15 cm diameter fan could maybe lift 4 kg of mass with a tip speed of 0 6M By increasing the power and the blade chord length (in other words, increasing the solidity of the rotor), this may be increased to maybe 6 kg or more, but a single fan would probably never lift more than 10 kg mass
- lift - How do helicopters hover? - Aviation Stack Exchange
$\begingroup$ It gets a little more complicated for helicopters than your first paragraph implies On a traditional plane, thrust and lift are easily separated; the propeller produces thrust, the wing produces lift, and these two forces operate at roughly right angles in level flight
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