干旱区生态环境知识资源中心(Arid): Measurements in Flight of the Flying Qualities of a Chance Vought F4U-4 Airplane: TED No. NACA 2388

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报告编号	NACA-RM-A7C05
来源ID	NTRS_Document_ID: 20050081862
	Measurements in Flight of the Flying Qualities of a Chance Vought F4U-4 Airplane: TED No. NACA 2388
	Liddell, Charles J., Jr.; Reynolds, Robert M.; Christofferson, Frank E.
英文摘要	The results of flight tests to determine flying qualities of a Chance Vought F4U-4 airplane are presented and discussed herein. In addition to comprehensive measurements at low altitude (about 8000 ft), tests of limited scope were made at high altitude (about 25,000 ft). The more important characteristics, based on a comparison of the test results and opinions of the pilots with the Navy requirements, can be summarized as follows: 1. The short-period control-free oscillations of the elevator angle and the normal acceleration were satisfactorily damped. 2. The most rearward center-of-gravity locations for satisfactory static longitudinal stability with power on, as determined by the control-force variations, were approximately 30 and 27 percent M.A.C. with flaps and gear up and down, respectively. 3. In maneuvering flight the conditions for which control-force gradients of satisfactory magnitude were obtained were seriously limited by sizable changes in the gradient with center-of-gravity location, airspeed, altitude, acceleration factor, and direction of turn. 4. The elevator and rudder controls were satisfactory for landings and take-offs. 5. The trim tabs were sufficiently effective for all controls. 6. The directional and lateral dynamic stability was positive, but the rudder oscillation did not damp within one cycle. The airplane oscillation damped sufficiently at low altitude but not at high altitude. 7. Both rudder-fixed and rudder-free static directional stability were positive over a sideslip range of +/-15 deg. However, the rudder force tended to reverse at high angles of right sideslip with flaps and gear up, power on, at low speeds. 8. The stick-fixed static lateral stability (dihedral effect) was positive in all conditions, but the stick-free dihedral effect was neutral at low speeds with flap and gear down, power on. 9. The yaw due to abrupt full aileron deflection at low speed was mot excessive, and the rudder control was adequate to hold trim sideslip. 10. In abrupt rudder-fixed aileron rolls in the clean configuration the maximum pb/2V for full aileron deflection at low and normal speeds was only 0.064. 11. The stalling characteristics were considered unsatisfactory in all configurations in both straight and turning flight due to inadequate stall warning. The motions in the stalls were not unduly severe, and recovery could be effected promptly by normal use of the controls.
英文关键词	CHANCE-VOUGHT AIRCRAFT FLIGHT STABILITY TESTS CONTROLLABILITY AIRCRAFT CONTROL FLIGHT CHARACTERISTICS LOW ALTITUDE HIGH ALTITUDE AIRFOIL OSCILLATIONS ELEVATORS (CONTROL SURFACES) AERIAL RUDDERS ACCELERATION (PHYSICS) AIRCRAFT MANEUVERS AERODYNAMIC BALANCE DYNAMIC STABILITY LATERAL STABILITY AILERONS ROLL
出版年	1947
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/20050081862
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/258338
推荐引用方式 GB/T 7714	Liddell, Charles J., Jr.,Reynolds, Robert M.,Christofferson, Frank E.. Measurements in Flight of the Flying Qualities of a Chance Vought F4U-4 Airplane: TED No. NACA 2388,1947.