Browsing by Author "Collar, A. R."

Browsing by Author "Collar, A. R."

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  • The design of wind tunnel fans. 
    Collar, A. R. (H. M. Stationary Office, 1940-08-10)
    Summary.—The present report is one of a series dealing with N.P.L. methods for the design of return flow wind tunnels. Reports already issued deal with the design of the Compressed Air Tunnel¹ and Open Jet Tunnels,² with ...
  • On the periodic effects experienced by the blades of a contra-rotating airscrew pair 
    Collar, A. R. (H. M. Stationery Office, 1941)
    The present paper discusses the effects on the performance of a contra-rotating airscrew pair of the oscillatory nature of the flow round the blades. The blade sections at a representative radius are developed into two ...
  • On the static thrust of contra-rotating airscrews 
    Collar, A. R. (H. M. Stationery Office, 1941)
    Under static conditions or at low rates of advance, the blades of a single airscrew are often stalled, except perhaps for the outer sections. At first sight, it would appear that the same conditions must apply to the blades ...
  • The prevention of flutter of spring tabs 
    Collar, A. R. (H. M. Stationery Office, 1943)
    The present report gives a correlation of the results of earlier researches into the prevention of flutter of spring tabs. The restrictions on the way in which tab mass-balance must be applied, which are given in the earlier ...

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