MEM425F11_HW1

# MEM425F11_HW1 - explain clearly how you determined them....

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Home work #1 (due 09/29/11) Problem I: 1. Identify any two airplanes (fixed wing, not rotary) that pick your interest. Explain what makes them interesting and what you think are its implications. 2. Tabulate all relevant data you collect on these aircrafts; geometry, weight, aerodynamics, propulsion, etc. Use technical terms as appropriate, such as wing-span, aspect ratio,… 3. Roughly estimate the coefficients of Lift and Drag while in cruise based on the data available for these aircraft. Also estimate the wing loading (weight-to-wing_area, W/S ratio) and the thrust-to-weight ( T/W) ratio. This is an open ended home work. The accuracy of the numbers is not important, but you need to
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Unformatted text preview: explain clearly how you determined them. Include reference to the source for your information. Problem II: An airplane weighing 20,000 lb, is in a cruise flight (constant altitude, constant velocity, level flight) at an altitude of 20,000 ft, with a velocity of 0.6 Mach. Its wing area is 1000 ft 2 . Given the drag polar of the airplane being , determine the thrust required to sustain this flight. Hint : find lift, coefficient of lift, coefficient of drag, drag, and the thrust.(Relevant atmospheric data can be found in the text book) Relevance to Program Outcomes a-k : a, k...
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## This note was uploaded on 01/10/2012 for the course MEM 425 taught by Professor Yousuff during the Fall '08 term at Drexel.

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