cee4674_runway_2

cee4674_runway_2 - Dr. Antonio A. Trani Professor of Civil...

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CEE 4674 – Airport Planning and Design (copyright A. Trani) 1 Dr. Antonio A. Trani Professor of Civil Engineering Virginia Polytechnic Institute and State University January 27, 2009 Blacksburg, Virginia
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CEE 4674 – Airport Planning and Design (copyright A. Trani) Runway Length for Regional Jets and Aircraft with MTOW > 60,000 lb (27,200 kg) Inputs to the procedure: – Critical aircraft – Maximum certificated takeoff weight (MTOW) – Maximum landing weight (MALW) – Airport elevation (above mean sea level) – Mean daily maximum temperature of the hottest month of the year – Runway gradient – Airport Planning Manual (APM) – Payload-range diagram (optional) 2
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CEE 4674 – Airport Planning and Design (copyright A. Trani) Determine takeoff runway length Determine landing runway length Apply adjustments to obtained runway length The longest runway length becomes the recommended runway length for airport design 3 Runway Length for Regional Jets and Aircraft with MTOW > 60,000 lb (27,200 kg)
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CEE 4674 – Airport Planning and Design (copyright A. Trani) 4 Temperature Effects in Runway Length Charts All design charts have a temperature parameters (be careful) While determining runway length for airport design, we need to use the temperature that closely matches the mean daily maximum temperature of the hottest month of the year When a temperature values in the chart is “no more than 3° F (1.7° C) lower than the recorded value for the mean daily maximum temperature of the hottest month at the airport” the chart is set to apply If the design temperature is too high consult with the aircraft manufacturer
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CEE 4674 – Airport Planning and Design (copyright A. Trani) Landing Procedure (FAA) a) Use the landing chart with the highest landing flap setting (if more than one flap setting is offer), zero wind, and zero effective runway gradient. b) Enter the horizontal weight axis with the operating landing weight equal to the maximum certificated landing weight. Linear interpolation along the weight axis is allowed. Do not exceed any indicated limitations on the chart. c) Proceed vertically to the airport elevation curve, sometimes labeled “pressure altitude.” Interpolation between curves is allowed. Use the wet pavement charts. Otherwise use 15% above the dry condition d) Read the runway length. Linear interpolation along the length axis is allowed. e) Increase the obtained landing length for “dry runway” condition by 15 percent for those cases noted in paragraph 508. No landing length adjustment is necessary by regulation for non-zero effective runway gradients for any airplane type. 5
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CEE 4674 – Airport Planning and Design (copyright A. Trani) Takeoff Runway Length Procedure (FAA) Select the correct aircraft-engine combination of runway length design charts Two possible paths to calculate runway length: No stage length provided : use the MTOW value from the payload-range diagram (near payload-break point – see diagram in next page) For actual routes expected to be flown (and used as design point) use the
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cee4674_runway_2 - Dr. Antonio A. Trani Professor of Civil...

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