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The Light-Line-Tethering Technique for Determining the Aerodynamic Derivatives of an Air Cushion Vehicle.

AD640209

Publication Date	1966
Personal Author	Kurylowich, G.
Page Count	2
Abstract	A complete feasibility study was performed on a new technique for determining ACV aerodynamic derivatives. A circular track simulated 'ground' while the vehicle, tethered to a centerpost by means of a light cable, flew a circular flight path above the track surface. A step on the 'ground' perturbed the vehicle from equilibrium and the resulting oscillations were recorded by a movie camera. The results obtained indicated that many derivatives were functions of height. Although scatter in the data permitted a qualitative study only, it was concluded that the scatter resulted from random errors in the recorded time histories and the manner in which the cable was attached to the vehicle. By making certain improvements in the experimental design and apparatus (especially using a larger track) it was concluded that all derivatives could be obtained with satisfactory precision with this technique. (Author)
Keywords	Ground effect machines Aerodynamic characteristics Feasibility studies Oscillation Experimental design Canada Mooring Flight testing Captive tests Tethering
NTIS Subject Category	51A - Aerodynamics
Corporate Authors	Toronto Univ (Ontario)
Document Type	Technical Report
Title Note	Final rept., Oct 60-May 65.
NTIS Issue Number	196622
Contract Number	AF 33(657)-8451

The Light-Line-Tethering Technique for Determining the Aerodynamic Derivatives of an Air Cushion Vehicle.

The Light-Line-Tethering Technique for Determining the Aerodynamic Derivatives of an Air Cushion Vehicle.
AD640209

Publication Date	1966
Personal Author	Kurylowich, G.
Page Count	2
Abstract	A complete feasibility study was performed on a new technique for determining ACV aerodynamic derivatives. A circular track simulated 'ground' while the vehicle, tethered to a centerpost by means of a light cable, flew a circular flight path above the track surface. A step on the 'ground' perturbed the vehicle from equilibrium and the resulting oscillations were recorded by a movie camera. The results obtained indicated that many derivatives were functions of height. Although scatter in the data permitted a qualitative study only, it was concluded that the scatter resulted from random errors in the recorded time histories and the manner in which the cable was attached to the vehicle. By making certain improvements in the experimental design and apparatus (especially using a larger track) it was concluded that all derivatives could be obtained with satisfactory precision with this technique. (Author)
Keywords	Ground effect machines Aerodynamic characteristics Feasibility studies Oscillation Experimental design Canada Mooring Flight testing Captive tests Tethering
NTIS Subject Category	51A - Aerodynamics
Corporate Authors	Toronto Univ (Ontario)
Document Type	Technical Report
Title Note	Final rept., Oct 60-May 65.
NTIS Issue Number	196622
Contract Number	AF 33(657)-8451