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Aircraft speed: Difference between revisions
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→V speeds: added V speeds used in CRJ aircraft
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==V speeds== | ==V speeds== | ||
For the complete V speed "definitions" list please visit [http://en.wikipedia.org/wiki/V_speeds Wikipedia]. Here a small abstract. Note that V speed definitions can depend of local [[Flight rules]]. Most V speeds depend on the aircraft configuration (how much it weights etc.) so must be calculated forehand and must be included in the flight-plan. V speeds are used to compare aircraft performance and will be mentioned in the aircraft flight manual (AFM). | For the complete V speed "definitions" list please visit [http://en.wikipedia.org/wiki/V_speeds Wikipedia]. Here a small abstract. Note that V speed definitions can depend of local [[Flight rules]]. Most V speeds depend on the aircraft configuration (how much it weights etc.) so must be calculated forehand and must be included in the flight-plan. V speeds are used to compare aircraft performance and will be mentioned in the aircraft flight manual (AFM). | ||
*M speeds are expressed in Mach. | |||
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|V<sub>R</sub> ||Nose-wheel take off speed. | |V<sub>R</sub> ||Nose-wheel take off speed. | ||
The speed at which the nose-wheel leaves (should leave) the ground. As the speed increases the yokes will be pulled at V<sub>r</sub>. It is also the speed at which the aircraft still can be stopped if there is a critical failure. The co-pilot (FO) will call out "rotate" during take off. V<sub>R</sub> is very similar to V<sub>ROT</sub> and V<sub>REF</sub>. | The speed at which the nose-wheel leaves (should leave) the ground. As the speed increases the yokes will be pulled at V<sub>r</sub>. It is also the speed at which the aircraft still can be stopped if there is a critical failure. The co-pilot (FO) will call out "rotate" during take off. V<sub>R</sub> is very similar to V<sub>ROT</sub> and V<sub>REF</sub>. | ||
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|V<sub>2</sub> || Takeoff safety speed. | |||
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|V<sub>3</sub> || Flap retraction speed. | |V<sub>3</sub> || Flap retraction speed. | ||
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|V<sub>A</sub>||Design manoeuvring speed. | |||
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|V<sub>LO</sub> ||Maximum landing gear operating speed. | |||
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|V<sub>LE</sub> || Maximum landing gear extended speed. | |||
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|V<sub>FE</sub> || Maximum flap extended speed. | |||
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|V<sub>C</sub> || Design cruising speed, also known as the optimum cruise speed, is the most efficient speed in terms of distance, speed and fuel usage. | |V<sub>C</sub> || Design cruising speed, also known as the optimum cruise speed, is the most efficient speed in terms of distance, speed and fuel usage. | ||