Browsing by Author "Lock, C. N. H."

Browsing by Author "Lock, C. N. H."

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  • The application of Goldstein's theory to the practical design of airscrews 
    Lock, C. N. H. (H. M. Stationery Office, 1930)
    A recent paper on the Vortex theory of screw propellers, by Dr. S. Goldstein in the Proceedings of the Royal Society, contains a solution of the problem of the potential flow past a body consisting of a finite number of ...
  • The effect of blade twist on the characteristics of the c.30 autogiro 
    J. A. Beavan; Lock, C. N. H. (H. M. Stationery Office, 1936)
    An analysis of the blade motion and force characteristics of the standard Cierva C.30 autogiro rotor is made, taking into account the torsional flexibility of the blades. The results are applied to the steady motion and ...
  • Further development of autogyro theory. parts 1 and 2 
    Lock, C. N. H. (H. M. Stationery Office, 1927)
    The general theory of the autogyro given by Glauert in R. & M. 1111 is based on certain simplifying approximations and assumptions. The object of the present paper is to develop the theory still further by removing some ...
  • Graphical method of calculating performance of airscrew 
    Lock, C. N. H. (H. M. Stationery Office, 1934-10)
    A rapid method is described of making calculations of airscrew performance by means of charts. The first application is to ordinary strip theory calculations on the basis of the formulae of Ref. 5. Six charts are required ...
  • The interference of a wind tunnel on a symmetrical body 
    Lock, C. N. H. (H. M. Stationery Office, 1929-10)
    The effect of the boundaries of a wind tunnel on the flow in the neighbourhood of a symmetrical body (i.e. (a) in two dimensions, a cylinder having a plane of symmetry parallel to the axis of the tunnel : (b) in three ...
  • Strip theory method of calculation for airscrews on high-speed aeroplanes 
    Lock, C. N. H.; Pankhurst, R. C. (H. M. Stationery Office, 1945-10)
    The report describes a simplified 8-point strip theory method of calculating the free-air performance of a propeller up to tip Mach numbers near the velocity of sound. It is based on the assumptions of R. & M. 1674 and ...
  • Tables for use in an improved method of airscrew strip theory calculation 
    Lock, C. N. H.; D. Yeatman (H. M. Stationery Office, 1934)
    An improved method of calculating the performance of an airscrew has been described in prcv:ious reports (Refs. I and 2), which includes an allowance for tip loss. The present report contains tables of a parameter (x) ...
  • Tunnel interference at compressibility speeds using the flexible walls of the rectangular high-speed tunnel 
    Lock, C. N. H.; J. A. Beavan (H. M. Stationery Office, 1944)
    The results of various measurements made in the National Physical Laboratory Rectangular High-speed Tunnel using the flexible walls are compared with theory in order to throw further light on the problem of tunnel interference ...
  • Wind tunnel experiments on a model autogyro at small angles of incidence 
    Lock, C. N. H.; Townend, H. C. H. (H. M. Stationery Office, 1928)
    A wooden scale model, 6 feet in diameter, of the original 4-bladed rotating wing unit of the Cierva Autogyro, has been tested in the Duplex tunnel at blade angles of 0°, 1°, 1.8°, 2.30° and 3°. It has also been tested as ...
  • Wind tunnel tests of high pitch airscrews 
    Lock, C. N. H.; Bateman, H.; Nixon, H. L. (H. M. Stationery Office, 1934-10)
    The main series of tests of the original family of airscrews described in R&M 829 consisted of measurements of overall thrust and torque on 5 two-bladed and four-bladed airscrews of pitch diameter ratios 0.3, 0.5, 0.7, 1.0 ...

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