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Wing body interference at supersonic speeds
No full textThe increment in lift due to wing-body interference at supersonic speed is calculated approximately for an untapered wing without sweepback
Some notes on the performance of small high speed wind tunnels
No full textThere is a need for high speed wind tunnels of modest dimensions and costs in establishments teaching the fundamentals of compressible flow. This paper discussed briefly the layouts and performances of various types of tunnel which might be suitable for colleges and universities. The subject is still in its infancy and this report should not be regarded as more than an attempt at reviewing the present position
Flutter and divergence of sweptback and sweptforward wings
No full textIn this note, the equations of the flexural-torsional flutter of a swept wing are established, assuming the wing to be semi-rigid and fixed at the root. The general effect of sweepback, wing stiffness and position of the inertia axis are determined. The critical speeds for flutter and for wing divergence are determined (i) for incompressible flow (ii) for compressible flow, assuming a modified Glauert correction.
The critical flutter speed is in general higher for a sweptback wing having the same wing stiffness as the upswept wing; foe a swept forward wing, divergence will occur before flutter
Analysis of experiments on swept wing structures
No full textThis report is concerned with the application of various theories to the solution of problems investigated experimentally, and in some cases theoretically, by others at the College of Aeronautics. Continues
On some aspects of the noise propagation from supersonic aircraft
No full textThe noise problem associated with an aircraft flying at supersonic speeds is shown to depend primarily on the shock wave pattern formed by the aircraft. The noise intensity received by a ground observer from a supersonic aircraft flying at high as well as low altitudes, is shown to be high although it is of a transient nature. Continues
Testing and analysis of a 60 degrees swept back wing with ribs parallel to the line of flight
No full textThe specimen used in this work represents the load carrying structure of a cambered two spar 60 degree sweptback wing, having closely pitched ribs of large boom area parallel to the line of flight, and thick skins. Continues
The effect of vibrations (sonic and subsonic frequencies) during the period of solidification on the mechanical properties of castings of gas turbine materials with special reference to H. R. Crown Max and Nimonic C. 75
No full textTest castings were designed to produce data which would help in the production of gas turbine blades as castings. For castings in H. R. Crown Max the investigation is limited to the effect of subsonic frequencies and range of amplitudes; but in the experiments conducted on Nimonic C. 75, both sub- sonic and sonic ranges of frequency were investigated
The protection of aircraft fuel tanks against explosion hazards using inert combustion products
No full textWithin certain ranges of temperature and pressure, the air-vapour mixture produced above the liquid fuel in aircraft fuel tanks will support combustion, and will burn explosively on the addition of the necessary energy for ignition. Although the danger zone for each type of aviation fuel can be clearly defined under equilibrium conditions, the many transient factors involved in practice make it difficult to find completely safe operating conditions for any fuel
The application of memo-motion to industrial operations
No full textMemo-Notion, or Spaced Shot Photography, was introduced as a tool of Work Study Dr. Mundel, then of Purdue University,
in 1946, as a means of reducing the cost of film analysis on long
operations by using a camera driven by a geared down electric motor, giving exposures every second. Since its introduction
Memo-Motion has been applied to a limited extent in the U.S.A., but it is not known to be in use at all in England
GeoSAR Feasibility Study: Summary of the Group Design Project. MSc in Astronautics and Space Engineering 2012/13
No full textStudents of the MSc course in Astronautics and Space Engineering 2012–13 at Cranfield University
performed a feasibility study of a geosynchronous radar mission for their group project. This report
summarises the students’ work and their findings.
The report consists of an overview and discussion of the technical work of the project and a
compilation of the executive summaries which describe the specific contributions of each student.
The mission studied is a Ku-band monostatic SAR in a small inclination (80 km relative orbit
diameter) geosynchronous orbit. The total launch mass is 2 tonnes, and images with resolution
40 m to monitor land subsidence in urban areas are produced. The mission appears to be feasible
within the scope of an ESA Earth Explorer proposal