Browsing CoA. Memoranda by Title

Browsing CoA. Memoranda by Title

Sort by: Order: Results:

  • The effect of grain size on workhardening and superplasticity in Zn/0.4% Al Alloy 
    Naziri, H.; Pearce, R. (College of Aeronautics, 1969-06)
    Superplasticity*requires, amongst other things, a metal with a grain-size in the range 0.5-5μ. Theories of SP invoking dynamic recovery require that the cell-Size of the substructure for the alloy in question is larger ...
  • The effect of lift-system airflow on the hull aerodynamics of hovercraft 
    Andrews, E. J. (College of Aeronautics, 1965)
    A first generation of commercial amphibious hovercraft has now been operating on a scheduled basis with revenue payloads on relatively-short over-water routes. On some of these routes, open-sea conditions prevail. By ...
  • Entrainment by axisymmetric jets impinging on a flat plate 
    Nobbs, K. W.; Searle, N. (College of Aeronautics, 1966-01)
    An experimental technique is described for the determination of the entrainment in an axisymmetric gaseous jet impinging normally on a flat plate situated below the nozzle. Typical results are given of experimental work ...
  • Extended plasticity in commercial-purity zinc 
    Williams, D. A. C.; Naziri, H.; Pearce, R. (College of Aeronautics, 1968-09)
    90% rolling-reduction of annealed commercial-purity zinc sheet (grain size 100 - 150 μ) results in the fragmentation of the large grains into, finally, stable micro-grains, 1 - 211 in diameter. The stability of the ...
  • Extended plasticity in commercial-purity zinc sheet 
    Naziri, Harry; Pearce, Roger (College of Aeronautics, 1968-01)
    Some microstructures are presented, following on from CoA Memo. No. 137. Annealed c.p. zinc deforms predictably, while the as rolled metal retains the equiaxed grain-size produced by room-temperature rolling. Some ...
  • Extended plasticity in commercial-purity zinc sheet 
    Williams, Derek (College of Aeronautics, 1967-10)
    99.15 pure zinc, when rolled at room temperature to reductions in excess of 50cp, shows properties grouped under the general title of 'extended plasticityl . At these reductions, the flow stress and elongation show an ...
  • Factors controlling gas turbine combustion performance at high pressure 
    Lefebvre, A. H. (Factors controlling gas turbine combustion performance at high pressure, 1965-02)
    In the post most of the research work carried out in gas turbine combustion was mainly concerned with performance problems arising at high altitudes. these were primarily problems of trying to achieve high combustion ...
  • Final report of grit blasting and metal spraying trials carried out at H. M. Dockyard, Devonport 
    Apps, R. L. (College of Aeronautics, 1966-03)
    Mild steel surfaces that are to be protected by aluminium or zinc spray coatings are generally prepared by blasting with chilled iron angular grit. Previous work1had shown that a relationship exists between the grit ...
  • First interim report on fluid diodes 
    Taylor, A. F. (College of Aeronautics, 1969-10)
    A description of the various forms of fluid diode and report of tests done on a breadboard unit leading to the manufacture and testing of a prototype 1 14u vortex diode. This work was carried out under contract for ...
  • First report on containers 
    Kay, E.; Pemberton, A. W. (College of Aeronautics, 1966-12)
    Everybody agrees that containers are a "good thing";the actual advantages of transporting cargo, and in particular, dry cargo, in containers over other forms of transport have, to our knowledge, nowhere been stated in ...
  • Flight techniques for the measurement of stability derivatives and aircraft response 
    Laure-Lean, D. W. (College of Aeronautics, 1965)
    A method of obtaining aircraft frequency-response from transient response data by Fourier analysis is currently being investigated. This report describes progress that has been made between the commencement of the ...
  • Grinding cycle control project 1967 
    Boshier, G. C. (College of Aeronautics, 1967)
    An investigation has been made into the sequential control of a grinding machine using electro—pneumatic, ball valve and wall attachment switching elements. Each system has been tested on a grinding cycle simulator ...
  • High temperature creep properties of ceramics United Kingdom Atomic Energy Authority Agreement No. SPO/A30081/EMR 
    Messer, P. F. (College of Aeronautics, 1967-12)
    An existing high temperature rig, originally constructed for torsional creep on graphite was adapted for work on the high temperature creep properties of ceramics. Use of the rig, with minor modifications, for torsional ...
  • Improvements in petrol engine performance with ultrasonic fuel atomisation 
    Norster, E. R. (College of Aeronautics, 1966-02)
    Initial studies of the effect of air-fuel mixture preparation on piston engine performance have been conducted on a four cylinder 1600 cc petrol engine using conventional carburation and ultrasonic fuel atomisation. The ...
  • In-process measurement 
    Loxham, J. (College of Aeronautics, 1967)
    "I often say that when you can measure what you are speaking about and express it in numbers, you know something about it; when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre ...
  • In-process stocks for automatic transfer lines 
    Roberts, A. C.; Kay, E. (College of Aeronautics, 1969-01)
    Automatic transfer lines are playing an increasingly important role in production. As production rates and capital investment increase, the cost of line stoppages also increases. A line stoppage of an automatic transfer ...
  • The influence of turbulence on the structure and propagation of enclosed flames 
    Lefebvre, A. H.; Reid, R. (College of Aeronautics, 1966-01)
    Although it has long been established that burning rates can be appreciably increased by turbulence, the actual extent of this increase and the precise mechanism involved are still far from clear. The object of the present ...
  • An investigation into the basic mechanics of orthogonal machining 
    Enahoro, H. (College of Aeronautics, 19)
    Three machines were modified to enable orthogonal cuts to be taken over a speed range of 0.04 in per min to 50 ft per min. The very low speed films were used to verify an analytical solution to the cutting operation at ...
  • Investigation into the effect of material properties and processing upon the springback characteristics of a 1.0% chromium 0.3% molybdenum steel 
    Pearce, Roger (College of Aeronautics, 1966-09)
    The principal properties which affect springback are known; these are modulus, yield-strength and rate of work hardening. A sheet of 1.0% Cr/O, 3% Mo in an steel (0.064" x 36" X 126") has been tested in an attempt to ...
  • An investigation of combustion instability in aircraft-engine reheat systems 
    Lefebvre, Arthur Henry; Verdin, H. W. P.; Squire, P. C. (College of Aeronautics, 1968-11)
    The principal objective of this study was to examine experimentally the effects of upstream temperature, velocity, gutter blockage, tailpipe length, and main and pilot fuel flows, on the form of combustion instability ...

Search CERES


Browse

My Account