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hovering in ground effect
- Definição1
- Hovering close to the surface (usually less than one rotor diameter above the surface) under the influence of ground effect.
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
- Definição2
- A helicopter hovering at a height that is equal to or less than the span of its rotors. A helicopter can hover in ground effect at a higher density altitude that it can hover out of ground effect. A helicopter requires less power to hover in ground effect than hover out of ground effect. The power requirement varies directly with the height above ground level.
- Fonte2
- KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
- Fonte3
- TRANSPORTATION SAFETY BOARD OF CANADA. Blade strike and rollover highland helicopters LTD. Eurocopter AS350 B2 (helicopter) C-GSHH Flourmill Volcano, British Columbia, 5nm W, 25 june 2004. Canada, [2005]. (Aviation investigation report, A04P0240). Disponível em:
- Fonte4
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual of aircraft accident and incident investigation. Part III: investigation. 1st ed. Montreal, 2011. (Doc. 9756)
- Nota Adicional1
- Acronym: HIGE.
- Contexto
- Helicopter performance is predicated on altitude, temperature, and gross weight. The theoretical performance limits are readily available to pilots in Section 5, Regulatory Performance Data, of the Direction Générale de l'Aviation Civile-approved rotorcraft flight manual (RFM). In part, the performance curves in the RFM predict the weight that a helicopter should be able to carry, given certain in-flight conditions, as well as identify the maximum certificated weight for those same conditions. Specifically, the RFM contains two performance charts that accurately determine the maximum weight that the helicopter can hover in, or out of, ground effect, namely HIGE1 (hover in-ground-effect) and HOGE2 (hover out-of-ground-effect) performance charts.
- Compared with performance required to hover out of ground effect (HOGE), hovering in ground effect (HIGE) has beneficial gain in lift production or in reducing power required to hover at the same weight when hovering approximately one rotor disc diameter or less above the surface.
- Subárea
- Rotorcraft
- Related Term
- hover out of ground effect
- Français
- vol stationnaire dans l'effet de sol