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Aviation History
1932
1932 - 1064.PDF
FLIGHT, OCTOBER 20, 1932 second term is a line integral taken completely round the circuit. The form of the expression shows that the time is independent of the direction in which the pilot flies round the course, and is dependent upon the direction, but not upon the sense of the wind (since cos 8 occurs only to an even power) ; con elusions which can, of course, be deduced from purely physical considerations. The first term which involves the speed, but not the direction of the wind or the shape of the circuit, is the more important, and can be very quickly computed. The second, involving the wind speed and direction, and also the shape of the course, is usually negligible for winds under 10 m.p.h. For stronger winds it must be considered. This method was used successfully in a cross-country race around a triangular course of 16-7 miles, shown in Fig. 2. From the lengths and directions of the sides of the triangle, the various terms of the expression for the time were cal culated for a range of machine speeds and winds of 0, 20, 30 m.p.h. from (1) north or south ; (2) east or west ; (3) north-east or south-west ; (4) north-west or south-east. An hour before the race the prevailing wind was blowing from the north-east at 12 m.p.h., and accordingly the total times were estimated from the chart reproduced in Fig. 3. Subtraction of these from the time of the slowest " scratch " machine gave the intervals from scratch at which each machine must be started. The result was very close, the first five competitors finishing in a bunch. a s § s THE MARCEL BLOCH 90 : The engine is a de Havilland Gipsy III. A FRENCH ALL-METAL LIGHT PLANE / [Ip^HE French Marcel Bloch aircraft works have y^ I recently built a new all-metal light plane, the 111 type Marcel Bloch 90. It is a high-wing mono plane, somewhat resembling the " Puss Moth." The construction is interesting as marking the first time an all-metal light plane has been built in France. The wing is composed of two halves, and is of rectangular plan form with rounded ends. The wing section is constant over the entire span. The wing structure is composed of two duralumin wing spars of I section, stiffened by double duralumin tube stays and cross-braced by steel wire. The ribs are also made in duralumin. The entire wing structure is covered with fabric. The wing is braced to the fuselage by two steel tube struts on each side. The fuselage, of rectangular cross section, is composed of a welded steel tube framework. The stays, also com posed of steel tube, are arranged diagonally. The fuselage has a cabin with two seats side by side, and is covered with fabric. The sides and floor of the cabin are covered with plywood. All the tail surfaces are made of steel tube and duralumin, and covered with fabric. They are not balanced. § 53 m " Travel in the Air " THE Wayfarers' Travel Agency, Ltd., will be holding a Public Luncheon on Thursday, October 27, at the Criterion Restaurant (Jermyn Street entrance), London, at 12.45 p.m. for 1 p.m. with the object of stimulating air travel. Col. the Master of Sempill will be in the chair, the Guests of Honour being Mr. and Mrs. J. A. Mollison, and the subject under discussion will be " Travel in the Air." Tickets, price 4s. 6d., may be obtained from The Wayfarers' Travel Agency, Ltd., 33, Gordon Square London, W.C.I. Flying Conditions on the West Coast of Africa ON Thursday, October 20, 1932, Fit. Lt. W. G. Pudney will deliver a lecture on " Flying Conditions on the West Coast of Africa." Fit. Lt. Pudney made, in 1931, a survey flight of the West Coast of Africa with the definite object of studying the possible development of new air lines. The lecture is very detailed of the condi tions to be found on the West African coast from Tangiers The undercarriage has a wide tread. It is composed of two cranked half-axles hinged to the fuselage and fitted with oleo-hydraulic shock absorbers. The two wheels are provided with brakes. This aircraft is fitted with the 120 h.p. " Gipsy III " engine, carried on a welded steel tube framework. Two petrol tanks, with a total capacity of 120 litres, are placed in the two wing-halves, while an auxiliary petrol tank of 50 litres can be placed in the fuselage. Span, 7 m. (23 ft.) ; wing area, 13 m.„ iT40 sq. ft.) ; weight empty, 320 kg. (705 lb.) ; useful load, 300 kg. (661 lb.) ; weight fully load, 620 kg. (1,366 lb.) ; wing loading, 47.7 kg./m.2 (9.78 lb./sq. ft.) ; power loading, 5.17 kg./h.p. (11.5 lb./h.p.); maximum speed, 210 km./h. (130.5 m.p.h.); cruising speed, 180 km./h. (112 m.p.h.) ; landing speed, 80 km./h. (50 m.p.h.) ; climb to 1,000 m., 4 min.«; ceiling, 6,000 m. (19,685 ft.); normal range, 800 km. (500 miles). This aircraft was built for participating in the Inter national Touring Competition, but could not start as it was not finished in time. Now the machine has made its first trial flights. F. W. S S § to Cape Town, and will be illustrated with a large number of photographs taken on the flight. Landing places, sea plane bases, meteorological conditions, communications generally and the like are fully dealt with in his account of a very remarkable survey flight. The lecture throws a new light on West African conditions. The chair will be taken by Air Marshal Sir Robert Brooke-Popham, K.C.B., C.M.G., D.S.O., A.F.C., F.R.Ae.S., Vice-President of the Society. The lecture will be at the Royal Society of Arts, 18, John Street, Adelphi, W.C.2, at 6.30 p.m. Fit. Lt. Pudney, who is now instructor at the Berks, Bucks and Oxon Aeroplane Club at Reading, joined the New Zealand Expeditionary Force on August 4, 1914, and was at the landing in Gallipoli. He joined the R.F.C. in 1916 and fought on the Western Front. For some time he was a test pilot at Martlesham Heath, and later was loaned to the Royal Canadian Air Force as a test pilot. Non- members will be welcome, but must sign the Visitors- Book in the entrance hall. 992
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