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Browsing Aeronautical Research Council (1945-1979) by Issue Date

Browsing Aeronautical Research Council (1945-1979) by Issue Date

Now showing items 21-40 of 2706

Flutter of control surface tabs

G. A. Naylor (1942)

Oscillation of control-surface tabs has occurred in flight. General experience and the investigations of this report suggest that the oscillations were flutter, involving translation of the tab, arising from bending of the ...
Wind-tunnel tests on the Shetland

C. H. E. Warren; R. E. W. Harland (1942)

Wind-tunnel tests were needed to obtain aerodynamic data on the Shetland. The following measurements were made: 1. Lift, drag and pitching moment for various conditions of the model over the complete flight range, with ...
Free-flight tests on kites in the 24-ft wind tunnel

S. B. Jackson (1942)

Tests were required to be made on six kites over a greater range of wind speed than for previous large-tunnel tests. The kites used during the investigation were (A) 3-ft Cody kite Mk. II, (B) 3-ft reversed Cody or Dyco ...
A theoretical analysis of longitudinal dynamic stability in gliding flight

H.M. Lyon; et al (1942)

As part of a general investigation of stability problems a review of the theoretical aspects of dynamic longitudinal stability was required. A summary is given of the theory of dynamic stability in gliding flight, including ...
The theory of parachutes with cords over the canopy

G. W. H. Stevens; T. F. Johns (1942)

The basis for designing parachutes of R. & M. 862 did not appear to be correct for parachutes with cords over the canopy. Moreover, the presence of these cords was essential in a practical design for heavy duty purposes ...
An approximation simplifying wing flutter calculations

G. A. Naylor (1942)

This report shows that the application of classical flutter theory to the determination of wing flexural-torsional flutter speeds is considerably simplified by the omission of a term which is usually the very small difference ...
A Review of Some Stalling Research With an Appendix on Wing Sections and their Stalling Characteristics

A. D. Young; H. B. Squire (1942)

Over a period of years a considerable amount of stalling research on various aeroplanes was completed at the Royal Aircraft Establishment and it was considered desirable that the main results should be summarised and ...
Graphical treatment of binary mass-balancing problems

R. A. Frazer (1942)

A graphical method, based on 'classical' flutter theory, is described which provides a simple test of the effectiveness of mass-balancing in the prevention of flutter at various heights. Illustrative applications are made ...
Calibration of the Royal Aircraft Establishment 24-ft wind tunnel

J. E. Allen; K. V. Diprose (1942)

Evidence from several check experiments indicated that the results of the preliminary calibration of 1935 were in error. The object of the described experiment was to investigate this and to calibrate the wind tunnel in ...
The induced drag of flapped elliptic wings with cut-out and with flaps that extend the local chord

A. D. Young (1942)

Calculations have been made of the induced drag of flapped elliptic wings covering a range of aspect ratios from about 4 to about 12, a range Of flap spans from 0.2 to 1.0 of the wing span, and a range of flap cut-outs ...
Stress diffusion adjacent to gaps in the inter-spar skin of a stressed-skin wing

M. Fine; H. G. Hopkins (1942)

The diffusion of stress in the .neighbourhood of chordwise gaps in the wing surface is an important structural design problem. Such gaps occur at wing joints and at undercarriage and bomb-bay cut-outs, and can involve local ...
A method of estimating the direct stress concentration round holes in reinforced sheet

M. Fine; Anne Pellew (1942)

It was shown in Aeronautical Research Council Report No. 5455 that the accurate stress-function solution of certain two-dimensional problems of stress distribution may be replaced, with negligible error, by the approximate ...
Spring Tab Flutter Part I A Theoretical Investigation on Wing-Aileron-Tab Flutter Part II Experiments on Binary Aileron-Tab Flutter

R. A. Frazer et al (1942)

Part I. A theoretical discussion is given of wing-aileron-tab flutter, with special reference to the influence of spring tab control. Numerical applications of the theory are made to two representative types of spring tab, ...
24-ft tunnel tests on a high-lift model downwash and velocity measurements at the tailplane

C. H. Naylor (1942)

Pitching moment measurements in the 24 ft. tunnel have shown that the highlift model with double Fowler flaps down and slat open, although reasonably stable without slipstream, becomes unstable at the higher thrust ...
Binary aileron--spring-tab flutter

G. A. Naylor; Anne Pellew (1942)

This note deals with binary aileron-spring-tab flutter involving rotation of the aileron and spring tab about their hinge lines. The methods of R. & M. 1155 are used to calculate the variation of flutter speed with various ...
The correlation of aeroplane loading and accident statistics

A. G. Pugsley (1942)

The general problem is to predict the probableeffect of a given change of structural strength upon the accident rate, the available data usually being in the form of rather meagre loading and accident statistics together ...
Measurements of cabin noise in bomber aircraft

D. Cameron; W. J. D. Annand (1942)

Measurements of cabin noise level, by means of an objective noisemeter and octave filter, have been made on a number of multi-seater aeroplanes. It was desired to examine these results to determine whether they could be ...
Experiments on laminar-flow aerofoil EQH 1260 in the William Froude national tank and the 13ft. x 9ft. and 9ft. x 7ft. wind tunnels at the National Physical Laboratory

A. Fage; W. S. Walker (1942)

To determine Whether the flow conditions in the William Froude National Tank and the new 13 ft. x 9 ft. and 9 ft. × 7 ft. tunnels at the National Physical Laboratory are sufficiently steady to allow the properties of ...
Proposal for an elevator maneuverability criterion

S. B. Gates (1942)

The approximate theory of response to elevator developed by Bryant, Gandy and Gates yields a compact formula for a criterion of manmuvrability Q, the 'stick force per increment in g' ; there is an anMogous but less useful ...
Estimation of wing flutter speeds from the curves of R. & M. 1869

Mary E. K. Graham (1942)

Normal classical theory is somewhat complicated for design use, and this report describes a simple method for the use. of designers : briefly, this is to estimate a straight-tapered wing equivalent to the'wing under ...

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Browsing Aeronautical Research Council (1945-1979) by Issue Date

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