Abstract
This paper makes an attempt to model the NOTAR anti-torque system of the MD600N helicopter for flight simulations. The model consists of the circulation control tail-boom, direct jet thruster and the vertical stabilizers. The airflow inside the tail-boom is modeled by dividing the flow into aerodynamic control volumes. The model features a blade element type approach for modeling the mass flow through the axial fan blades as well as aerodynamic mass and momentum conservation calculations in each control volume. The side force produced by the direct jet thruster and circulation control tail boom is calculated by the model at different flight conditions. A simple rectangular platform with symmetrical airfoil shape is used to model the vertical tail. The developed NOTAR anti-torque model is integrated with a nonlinear helicopter model. Flight tests are performed on the MD600N and the data obtained are used for verification. Results show a reasonable match between the model and flight test data in the anti-torque response in hover and forward flight to pilot pedal input.
Original language | English |
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Pages (from-to) | 1663-1672 |
Number of pages | 10 |
Journal | Annual Forum Proceedings - AHS International |
Volume | 3 |
State | Published - 2010 |
Externally published | Yes |
Event | 66th Forum of the American Helicopter Society: "Rising to New Heights in Vertical Lift Technology", AHS Forum 66 - Phoenix, AZ, United States Duration: 11 May 2010 → 13 May 2010 |