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Aviation History
1922
1922 - 0152.PDF
MARCH 9, 1922 the load along the main spars. This loading does not, of course, determine the strength of the ribs, and supplementary tests are, therefore, necessary. The chief difficulty lies in determining the distribution of the loading on the rib. This is influenced by three main factors : the distribution of air forces, the re-distribution of these forces through the medium of the fabric covering to the ribs, either directly or through leading and trailing edges, and the stresses introduced by the initial tension of the fabric. The distribution of the air forces must be assumed from tests on wing sections, and the stresses introduced by the doped fabric, as they may be considerable and cannot be estimated accurately, can best be reproduced by covering a test section of plane, taking care that the dummy end ribs are very stiff. As it is extremely difficult to calculate the distribution of stresses in the covering of a plane, assumptions must be made. The lecturer referred to the method described in R. & M. No. 344, and to the duplicate levers used for testing two ribs simul taneously. An exceptional case occurs when certain sections, such as R.A.F. 15, are flying at very high speed and at a small angle of incidence. Under these conditions, the top surface is heavily loaded, while the lower surface has loads varying from positive to negative, but never being of great magnitude. For such a case it is sufficiently accurate to remove panels of fabric from the lower surface, and to apply a load of loose shot to the top surface, the wing being, of course, inverted. The lecturer concluded with a description of the standard type of shot bag employed at the Royal Aircraft Establish ment. Married. Flight-Lieut. WALTER FRASER ANDERSON, D.S.O., D.F.C., 45th Squadron, R.A.F., youngest son of the late Capt. John Weir Anderson, of Toronto, Canada, was married on February 2, at the British Consulate, and afterwards at All Saints' Church, Cairo, to PHYLLIS MARY, only daughter of Mr. WILLIAM O. JOSEPH, of Zeitorin, Cairo. ERIC BURTON-, R.A.F., son of Mr. and Mrs. F. Burton, of Hildenborough, was married on March 4, at St. Mary's, Chiddingstone, to JESSIE VIVTENNE, younger daughter of Mr. and Mrs. SYDNEY FREEMAN, of Waterlake, Chiddingstone, Kent. To be Married The engagement is announced of Maj. ALAN M. MORISQN, A.F.C., Croix de Guerre, late R.A.F., of Togston Hall, Acklington, Northumberland, only surviving son of John Morison, of 18, Windsor Terrace, Newcastle-on-Tyne, and Mrs. Morison, and HILDA BLANCHE, younger daughter of JOSEPH THOMPSON, of East Cliff Mansions, Bournemouth, and Mrs. THOMPSON. H H " Safety First " Air Prize A PRIZE of 25,000 francs is offered by the French " L'Union pour la Securite en Aeroplane," for the best safety device or scheme for flying in fog or at night submitted during 1922. Details governing the award are not yet available, but those interested can communicate with the Association at 35, rue Francois-Ier, Paris. Seaplane Contest at Marseilles IT is announced that the Aviation Committee of the Colonial Exchequer, to be held at Marseilles this year, have definitely decided to organise a contest for seaplanes from April 17 to 19. There will be three categories: under 150 h.p.; 150 to 400 h.p. ; and over 400 h.p. Eliminatory trials are to take place on April 17 when entered craft must ascend to 1,000 metres, and have on board, in addition to the normal useful load, sufficient fuel for ij hrs. flight. The course, Marseille-Monaco, is 413 kilom. Prizes to the extent of over 40,000 francs are offered. An entrace fee of 200 francs (returnable in its entirety) obtains, and communications should be addressed to the Aviation Commission. A. C. de France. Military competitors will take part hors concours, a trophy being their recompense. To Improve upon " landing " on Water IN France our contemporary L'Auto, has raised the point of finding a verb better to define " landing " on water. Suggestions, weird and otherwise, are naturally forth coming, amongst them being aquarir, aquater, and afflotter. For our own part, we get over it by putting the trouble on to " alighting." Gliding in Germany this Year FROM reports from Germany it appears that the gliding competitions which started on quite a modest scale a couple of years-ago are to assume greater proportions in the future. Not only are the Rh6n competitions to be resumed this summer, but it is stated that a new prize of roo,ooo marks is The engagement is announced of Mr. A. BALDWIN RAPER, M.P., late R.A.F., to the MARCHIONESS CONYNGHAM. Death Maj. PERCY RUSSELL GRACE, who died on February 27 at Wrotham Heath, Kent, was the fourth surviving son of the late J. W. Grace, for some time of Leybourne Grange, Kent, and of the late Mrs. Grace, of Elm Park House, London. Bom in 1879, he was variously educated in England, America and Germany, and studied engineering at considerable length. He was one of the first to own a motor-car, and again, when flying machines were still in their infancy, he and his brother. Mr. Cecil S. Grace, the well-known airman, who lost his life in the Channel in 1910, went to Sheppey in the late autumn of 1908. Here the brothers established a staff of skilled workmen and admirably equipped workshops. Owing to his marriage and the death of his brother, he was not able to continue in aeronautical work. During the War he served in the Flying Corps and contracted tuberculosis in a very virulent form. From this he never recovered entirely, remaining an invalid until the time of his death. 13 E to be offered for the first German glider which makes a flight of 40 minutes' duration over a course similar to that of a yacht race. Presumably this means over a triangular course. The prize, it is reported, is to be offered by the Society of German aircraft constructors, after consultation with the German Aero Club, and the German Aeronautical Society. The conditions are sufficiently difficult, coupling as they appear to do a duration of 40 minutes with a specified course. One or the other might be fairly easily attainable, but the combination of the two is so difficult that one doubts whether the prize will be won for some considerable time. Rather Suggestive AN "evening contemporary, in referring to extra summer attractions proposed for Southend, sets out that " an enter prising Brixton firm have secured the right to establish a seaplane or hydroplane service from the shore near the pier. For every passenger they take aboard they pay the Cor poration 6d.; if they bring him back they have to pay another 6d." We are just wondering how much the firm will have to pay if they don't ! Students' Section R.Ae.S. THE Students' section of the Royal Aeronautical Society is rapidly gaining in popularity. The attendance at the meetings is increasing, and altogether the section is proving extremely useful. On March 23 a paper will be read by Mr. S. H. Evans, Hon. Sec. of Students' Section, entitled " Some Notes on Commercial Aircraft." On April 7 Prof. L. Bairstow will read a paper on " Some Outstanding Problems in Aeronautics." The meeting for April 7 will be the " Annual Lecture " of the Students' section, and it is hoped to make this a permanent feature to be held at the close of each session. To this lecture all grades of the Society will be admitted. Both meetings referred to will be held at the R.Ae.S. Library, 7, Albemarle Street, W. 1, at 6.45 p.m. The Chairman on March 23 will be Mr. A. V. Roe. 152
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