ASE 102 - Practice Midterm

ASE 102 - Practice Midterm - MIDTEM EXAMINATION ASE 102 F...

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Unformatted text preview: MIDTEM EXAMINATION ASE 102 F a1] Semester Wednesday, October ‘1 1, 72006 Name I. Pleaseindicate whether the following statements are true or false: (20) 1.) The Northrop 13-2 bomber is-a’biplane. (2) 2.) The Bell-22 “Osprey’f aircraft can land and take off like a helicopter and fly like an airplane. . (2') ‘ _ 3.) A. turbojet engine has more moving parts than a reciprocating .engine. (2) 4.) The roll of an airplane is controlled by the ailerons. (2) 5.) The airplane flown by the Wright brothers in December 1903 Was powered by a primitive turbine engine. (2) 6.) Sir George Cayley Was the first person to realize that a sucebssful flying machine could require the separation of the thrust from the lift. (2) ’7.) An airplane is stable in flight if the center of lift is above the center of gravity. (2) “ 8.) The lifting force of a balloon at its equilibrium altitude is due to-the fact that the gas inside the balloon has a molecular weight less than the equivalent- molecular weight of air (2) 9.) Igor Sikorsky invented the heliCOpter a year following the Wright brothers First flight in December 1903. (2) ' 10,) The first commercial transport jet engine powered aircraft was the Douglas DC-3 which flew for the first time in l935.‘ (2) II. A Grumman F14 “Tomcat? fighter aircgaft is designed tcbe launehed by a catapult mounted on tlge'bcw'cf an aircraft earlier — see-Qjeture. The aircraft weights 80,000 lbs. fully loaded. .With the wings extended the aspect ratio cf the wingsis eight and the thickness of the Wing is ope foot. On a windless day, the aircraft eatrier has to move at flack speed cf 35 knots, cr 40 miles per hotly, in order for the catapult to . get the aircraft airborne. What is the speed increment that the catapult must add to the aircraft? (20) A Nara, {'1' car” Car Ca 44» pélf J III. A high. altitude ballpgii used .fo rgsegzqh is mgdc ofthin mylar and it has a mass of 1000 kgms. This balloon is designed ‘to darry a payload'of 100001;ng and reaches an altitude of 20,000 meters. If hydrogen is mad as the lifting gas, What radius must the balloon have to reach the designated altitude?‘ (20) IV. The Noitliijep 3'2 “Spirit” bomber flew non-Stop niissions from Whitman AirForee I Base in Misseuri to Koé'oiro arid—back during the war ”in 1999. The B-Z aircraft has a lift to drag ratio "of 253110- the constant lc/e}; in the Breguet equation is 1.000 knit The distance (from Whitman AFB to the tai'get"_in Kosovo Was 10,000 km. “The aircraft had to be reitteletl by a McDonnell-IDouglas K010 tanker aircraft on the'Way toKosovo over the Azores, 7000 km from the base of the 13—2. Assume that the fuel rim: was empty at I the i-‘efiieling and was full after the refueling. The B-2 carries 20 bombs each with a mass of 1000 kgms and the dry ‘mass of the 13-2 is 100,000 kgms. The airplane continues it mission and delivers the weapon-s to the target in Kosovo‘ When the aiiplane drops its ‘ bomb load, it gains altitude and flies more efficiently. Thus, the constant in the Breguet equation, k/eg, is now 2,000 km. Can the 13-2 return to Whitman Air Force Base Without ~ refueling? 7(3 0) V. A gh‘deyhae wings with an 'a‘speet yetie of 40 and a tfielmess of 0.5 feet. The aircraft weigh-'3 4,000 lbs. There is a HeQQWiiid'Of 20 miles per hour, The aircraft is flying directly into the directien ‘of the-headwind and it is; stationary with respect to the ground. A At what altitude must the airplane be flying? (10) ...
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