Spin-tunnel investigation of the effects of mass and dimensional variations on the spinning characteristics of a low-wing single-vertical-tail model typical of personal-owner airplanes
Spin-tunnel investigation of the effects of mass and dimensional variations on the spinning characteristics of a low-wing single-vertical-tail model typical of personal-owner airplanes
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质量和尺寸变化对个人飞机典型的低翼单垂直尾翼模型旋转特性影响的旋转隧道研究
DOI：
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发表时间：
1951
期刊：
影响因子：
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通讯作者：
Jack H. Wilson
中科院分区：
文献类型：
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作者：
W. J. Klinar;Jack H. Wilson
摘要：在兰利20英尺自由尾旋风洞中进行了一项研究，以确定质量和尺寸变化对代表当今四位私人飞机设计的模型的尾旋和改出特性的影响。根据1949年11月1日修订的《民用航空条例》第3部分对私人飞机的要求，也对调查结果进行了分析。研究表明，对于私人飞机或联络飞机，即使尾部阻尼功率因数不是很大，只要所用的改出技术是在大约1/2转之后再使操纵杆向前运动的方向舵完全快速反向，就可以容易地获得满意的改出特性。然而，其它的改出技术，例如在方向舵反向之前过早地向前移动操纵杆，可能导致在质量沿着机身伸展而沿着机翼收缩的载荷条件下，结合低的尾翼阻尼功率因数值，改出缓慢。
Abstract : An investigation has been conducted in the Langley 20-foot free-spinning tunnel to determine the effects of mass and dimensional variations on the spin and recovery characteristics of a model representative of present-day four-place personal-owner airplane designs. The results of the investigation are also analyzed in light of requirements for personal-owner airplanes as set forth in Civil Air Regulations Part 3 as amended to November 1, l949. The investigation showed that for personal-owner, or liaison, airplanes, satisfactory recovery characteristics can be readily obtained even if the tail-damping power factor is not very great, provided the recovery technique used is full rapid rudder reversal followed approximately 1/2 turn later by forward movement of the stick. Other recovery techniques, however, such as premature movement of the stick forward before the rudder is reversed may lead to slow recoveries for the loading condition having mass extended along the fuselage and retracted along the wings in combination with low values of tail-damping power factor.