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Kinematic properties of the helicopter in coordinated turns
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Chen, R. T. N. Jeske, J. A. |
| Copyright Year | 1981 |
| Description | A study on the kinematic relationship of the variables of helicopter motion in steady, coordinated turns involving inherent sideslip is described. A set of exact kinematic equations which govern a steady coordinated helical turn about an Earth referenced vertical axis is developed. A precise definition for the load factor parameter that best characterizes a coordinated turn is proposed. Formulas are developed which relate the aircraft angular rates and pitch and roll attitudes to the turn parameters, angle of attack, and inherent sideslip. A steep, coordinated helical turn at extreme angles of attack with inherent sideslip is of primary interest. The bank angle of the aircraft can differ markedly from the tilt angle of the normal load factor. The normal load factor can also differ substantially from the accelerometer reading along the vertical body axis of the aircraft. Sideslip has a strong influence on the pitch attitude and roll rate of the helicopter. Pitch rate is independent of angle of attack in a coordinated turn and in the absence of sideslip, angular rates about the stability axes are independent of the aerodynamic characteristics of the aircraft. |
| File Size | 1336411 |
| Page Count | 40 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810013509 |
| Archival Resource Key | ark:/13960/t6c29qg1d |
| Language | English |
| Publisher Date | 1981-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Pitching Moments Helicopters Helicopter Performance Roll Angle of Attack Aerodynamic Characteristics Sideslip Kinematic Equations Aerodynamic Loads Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
