dong090909
Well-Known Member
1. I respect Sikorsky, but this does not affect my skepticism about his company, working in the rigid rotor field.
2. I think Sikorsky may be wrong on the following points:
A. The rotor should not be used for flight, the efficiency is too low, it is best to only use it for lift
Of course, the premise is:
---The rotor can be collected;
---The flexible rotor is too complicated to be collected, so the collection should start with the rigid rotor.
B. It is best for the rotor to only work at a low forward speed. The essence of using the rotor for high-speed flight is: self-made great troubles, and then great solutions.
C. The lift balance condition of the coaxial or common axis reversing rotors is : the upper and lower rotors are in the same phase. This point is so significant that the world has lost its way to improving rotor systems.
3. The high difficulty of rotor aerodynamics is reflected in: how to ensure the lift balance of the upper and lower rotors at the forward speed.
4. DONG090909 is determined to abandon the essence of flexible rotors of all the great airlines for nearly a century, and also keeps a distance from Sikorsky's great ABC rotor theory and takes its own unique path.
5. To maintain the rotor, at the forward speed, the plan for the balance of lift is:
A. The rotor is only used for lifting and landing, not for flying, that is, the aircraft is designed for the collection of rotors.
B. Try to increase the number of blades of the rotor.
C. Try to keep the rotor working at low speed.
D. Let the fixed wing suppress the fluctuation of rotor lift and maintain the survival of the aircraft.
E. Use the side-flying gyro effect for stabilization.
F. When there is no forward speed, use 4 tilting engines to fight the side wind.
2. I think Sikorsky may be wrong on the following points:
A. The rotor should not be used for flight, the efficiency is too low, it is best to only use it for lift
Of course, the premise is:
---The rotor can be collected;
---The flexible rotor is too complicated to be collected, so the collection should start with the rigid rotor.
B. It is best for the rotor to only work at a low forward speed. The essence of using the rotor for high-speed flight is: self-made great troubles, and then great solutions.
C. The lift balance condition of the coaxial or common axis reversing rotors is : the upper and lower rotors are in the same phase. This point is so significant that the world has lost its way to improving rotor systems.
3. The high difficulty of rotor aerodynamics is reflected in: how to ensure the lift balance of the upper and lower rotors at the forward speed.
4. DONG090909 is determined to abandon the essence of flexible rotors of all the great airlines for nearly a century, and also keeps a distance from Sikorsky's great ABC rotor theory and takes its own unique path.
5. To maintain the rotor, at the forward speed, the plan for the balance of lift is:
A. The rotor is only used for lifting and landing, not for flying, that is, the aircraft is designed for the collection of rotors.
B. Try to increase the number of blades of the rotor.
C. Try to keep the rotor working at low speed.
D. Let the fixed wing suppress the fluctuation of rotor lift and maintain the survival of the aircraft.
E. Use the side-flying gyro effect for stabilization.
F. When there is no forward speed, use 4 tilting engines to fight the side wind.