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pitch attitude
- Definição1
- The attitude of an aircraft relative to its longitudinal axis.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 4th ed. Newcastle: ASA, 2006.
- Fonte2
- FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Human factors training manual. Montreal, 1998. (Doc. 9683 AN/950).
- Nota adicional1
- Pitch attitude servers as a visual reference for the pilot to maintain or change airspeed.
- Contexto
- The altimeter gives an indirect indication of the pitch attitude of the helicopter in straight-and-level flight. Since the altitude should remain constant in level flight, deviation from the desired altitude shows a need for a change in pitch attitude, and if necessary, power. When losing altitude, raise the pitch attitude and, if necessary, add power. When gaining altitude, lower the pitch attitude and, if necessary, reduce power.
- The rate at which the altimeter moves helps in determining pitch attitude. A very slow movement of the altimeter indicates a small deviation from the desired pitch attitude, while a fast movement of the altimeter indicates a large deviation from the desired pitch attitude. Make any corrective action promptly, with small control changes. Also, remember that movement of the altimeter should always be corrected by two distinct changes. The first is a change of attitude to stop the altimeter; and the second, a change of attitude to return smoothly to the desired altitude. If the altitude and airspeed are more than 100 feet and 10 knots low, respectively, apply power along with an increase of pitch attitude. If the altitude and airspeed are high by more than 100 feet and 10 knots , reduce power and lower the pitch attitude.
- In December 1974, a Boeing 727 crashed 12 minutes after departure from JFK airport. The airspeed and altitude values recorded in the FDR are consistent with the pr edicted climb performance until t he air craft reached 16,000 ft, when icing was encountered. The airspeed when the stick-shaker was activated was estimated to be 165 kt, compared to the 412 kt recorded by the FDR. The pitch attitude would have been 30 degrees nose-up.
- Subárea1
- Aerodynamics
- Related Term
- pitch
- Português
- atitude de arfagem