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Aeroplane design studies conventional and V.T.O.L. freighter aircraft (Academic Years 1959 and 1961)
No full textDuring the second year of their course in the Department of Aircraft Design,
students have the option of working as a member of a team engaged in a design
study. The subjects for the studies are chosen to represent the current interests
of the industry and include unusual features considered to be worthy of investigation.
Examples of these design studies are the F-59 freighter and its derivative
the F-61, V. T.O. L. freighter. In a conventional role these designs are intended
to carry a payload of up to 77000 lb. , over 800 nautical miles range, using four
turboprop engines. V. T.O. L. capability is given to the F-61 design by the addition
of two wing pods, each of which houses 22 lift engines. The application of boundary
layer control in the form of blown ailerons and flaps has been investigated for the
F-59 design. Both aircraft have been designed in detail.
The major conclusion of the studies is that the application of V. T.O. L. to
large freight aircraft is feasible, but further detailed work is necessary to resolve
some flutter and noise problems
In-process measurement
No full text"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 and unsatisfactory
kind."
The above statement was made by Lord Kelvin (1824-1907) about'''
hundred years ago and is reproduced as the main theme of the present
paper. The only qualification that should be made is that when Lord
Kelvin made the above statement he did not think that the philosophy he
expounded was specially appropriate to engineering manufacture. The
present paper will consider how this philosophy can b3 applied to
engineering manufacture only. ...[cont.
The thermal degradation of epoxy resins 3: the thermal degradation of polypyromellitimides 1
No full textHigh temperature creep properties of ceramics United Kingdom Atomic Energy Authority Agreement No. SPO/A30081/EMR
No full textAn 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 creep on ceramics was not successful and major modifications
to enable creep in tension and compression were carried out
A simple technique for the preparation of thin foils in aluminium and its alloys
No full textTransmission electronmicroscopy using thin metal foils
depends largely upon the success of the techniques used for the
preparation of the thin foil. Many methods have been developed
successfully for a wide range of
materials and these have been
discussed in detail elsewhere. These methods are as
diverse as mechanical polishing, ionic bombardment and
electrochemical thinning.
The basis of one of the simplest of these methods is to
produce a small sample of the metal and to thin this by a
combination of mechanical polishing and electrolytic dissolution … [cont.]
The time-dependent mechanical properties of fibre reinforced polymers
No full text1. General Progress
In the six months from April to September 1968 the task of primary
importance has been to design lateral extensometers and to improve the
longitudinal extensometer and consequently enable reproducable measurements
of the deformations undergone by creep specimens to be made … [cont.]
Aeroplane design study STOL airliner (A71). Part 3- low speed lift and control
No full textThe potential application of advanced forms of aircraft
control to civil operation appears to be capable of being split
into two areas. First, those aircraft which are very large,
whose rotary inertia tends to reduce the effectiveness of
conventional controls. Second, those aircraft whose
specification dictates that the aeroplane be flown at very low
speed. Again conventional controls become inefficient due to
decreased aerodynamic efficiency.
The second category of aircraft has been considered in
the form of an STOL aircraft. The control problems of an STOL
aircraft with a 2000 ft runway capability (Ref.10) have been
examined. It has been found that the aircraft is unstable
and could require autostabilisation. None of the conventional
controls were satisfactory and each required augmentation.
The single strip crosswind requirement penalises the design
most heavily since this requires over half of the extra control
power necessary. The total augmentation for blowing air
amounts to an equivalent thrust of approximately 6700 lb.
This is equivalent to 11.5 per cent of the total installed
aircraft thrust
Human factors problems in the design of vibration isolation systems: a contribution to the evaluation problem of passenger car suspension systems
No full text1.0 Introduction
In Appendix 1 of this report general procedures for the design and
evaluation of vibration isolation, systems. are reviewed. It is shown
that in general., a: vibration isolation system is adequate only when it
enables a human operator to meet the objectives of some system by
performing a task well enough and for long enough. If the vibration
intrudes too far upon the operator's performance and endurance the
system of which he is a part will not meet its objectives. There still
remain examples today where inadequate vibration isolators limit the
performance of a system. The agricultural tractor is one of these. It
is not uncommon to see a tractor driver supplementing the tractor tyre
spring by using his own vibration isolators - his legs