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Aviation History
1920
1920 - 0595.PDF
JUNE 3, 1920 ROYAL A E RO CLUB 1 FIRST RACE MEETING, 1920 > AERIAL DERBY Under the Competition Rules of the Roval Aero Club and the Regulations of the Federation A&ronautique Internationale.) AT THE LONDON AERODROME, HENDON, N.W. (By arrangement with the Grahame-White Co., Ltd.) SATURDAY, JULY 24, 1920, at 3.30 p.m. REGULATIONS QUALIFICATIONS OF COMPETITORS .—The Competitionis open to persons of any nationality holding a licence issued by any Aero Club affiliated with theFederation Aeronautique Internationale. ORGANISATION.—The Competition shall be conducted bythe Royal Aero Club under the Competition Rules of the Royal Aero Club and the Regulations of theFederation Aeronautique Internationale. •ENTRIES.—The entry fee is £\Q. This fee together withthe entry form must be received by the Royal Aero Club, 3, Clifford Street, London, W. 1, not laterthan 12 noon on Wednesday, July 14, 1920. -COURSE—The Course is approximately 200 miles, andwill consist of a double circuit of London, starting from the London Aerodrome, Hendon, with thefollowing turning points :— ;;t:;- Brooklands Aerodrome, Weybridge.. *-". '!_;';'"• Epsom. H !-• ',- West Thurrock.~'j'•':,.--.. Epping. ; - Hertford. GENERAL1. A competitor, by entering, thereby agrees that he ;is bound by the Regulations herein contained or to behereafter issued in connection with this competition. 2. The interpretation of these regulations or of anyto be hereafter issued shall rest entirely with the Royal Aero Club. 3. The competitor shall be solely responsible to theofficials for the due observance of these Regulations, and shall be the person with whom the officials willdeal in respect thereof, or of any other question arising out of this competition. 4. A competitor, by entering, waives any right ofaction against the Royal Aero Club for any damages sustained by him in consequence of any act or omissionon the part of the officials of the Royal Aero Club or their representatives or servants or any fellowcompetitor. 5. The aircraft shall at all times be at the risk In allrespects of- the competitor, who shall be deemed by entry to agree to waive all claim for injury either tohimself, or his passenger, or his aircraft, or his em- ployees or workmen, and to assume all liability fordamage to third parties or their property, and to indemnify the Royal Aero Club in respect thereof. 6. The Committee of the Royal Aero Club reserves toitself the right to add to, amend, or omit any of these rules should it think fit. PRIZES A complete list of the prizes will be published nextweek. The cash prizes will be as follows :— Fastest Time £500 Handicap 1st Prize /25O Handicap 2nd Prize 210°Handicap 3rd Prize £50 Offices: THE ROYAL AERO CLUB, 3, CLIFFORD STREET, LONDON, W. I. , H. E. PERRIN, Secretary. THE ANNUAL RECEPTION AT THE N.P.L. "IN accordance with the time-honoured custom of opening the JSf.P.L. to visitors once every year, a reception was held by -Sir Joseph Petavel and members of his staff at Bushy House -on Friday of last week. As in previous years the Engineering Department and Aerodynamics Department were open from4 to 7 for exhibits and demonstrations. During the afternoon tea was served to a distinguished gathering of visitors repre-•senting science, various branches of engineering, the Ministry -of Transport and the Air Ministry.Of greatest interest to those connected with aviation was naturally the Aerodynamics Department, in which a series of-interesting exhibits were examined, and demonstrations given -by Messrs. Relf, Fage, Pannell, Bryant, Irving, Lavender,Frazer, Simmons, Cowley, Jones, Levy, Ower, Batson, Bateman, Howard, and Williams.. In the 4-ft. channel No. 1was demonstrated an airscrew balance used for measuring the thrust and torque of an*airscrew, and also the lateral forceon the airscrew when yawed so as to be at an angle to the wind, as occurs in an actual machine during, for instance, a sideslip. In another of the old 4-ft. wind channels, No. 2, a -demonstration was given of the auto-rotation of a stalledaeroplane. The model is so mounted as to be set at a large angle of incidence, and is constrained to rotate about ahorizontal axis through the centre of gravity. As soon as the air current was started the model commenced to rotate,-illustrating very clearly the main characteristics of a spinning nose dive. The 7-ft. channel No. 1 was being used for measuring theperformance of an airscrew, a specially designed apparatus being employed for this purpose. The model airscrew was-driven by an electric motor totally enclosed in a model fuse- lage, this arrangement representing the case of an actualairscrew installed in an aeroplane or airship and enables the •effect to be ascertained of the presence of the fuselage onthe performance of the propeller. In the 7-ft. channel No. 2 was shown a model aeroplane wing provided with ailerons hinged so as to be capable of any-setting in relation to the rest of the wing. The model is so mounted that the rolling moment due to any aileron setting,and also the hinge moment of the aileron, can be measured by light balances in the roof of the wind tunnel. Finallyvisitors were shown, in 7-ft. channel No. 3, how measurements are obtained of the lift and drag of aeroplane models. Themodel was supported mainly by two wires from the wings. These wires passed through the roof of the tunnel to a balanceabove. The tail of the model was held by a pin joint at the lower end of a lever which formed part of a second roofbalance. By means of these two balances it is possibly to find the lift, drag, and pitching moment about any desiredaxis. In the Engineering Department many of the exhibits anddemonstrations were naturally not directly connected with the science of aircraft construction, although indirectly thereare few fields of endeavour which do not bear upon this youngest of sciences. Of immediate interest were, however,the internal combustion engine section, the apparatus for measuring skin friction, sound location apparatus, andapparatus for timing reflex action. Of special interest in the internal combustion engine section were the apparatus forinvestigating the effect of pressure and temperature in the detonation of internal combustion engines, and the testingapparatus for fireproofness of magnetos. The subject of fluid motion is so closely linked up withaerodynamical problems that it was with the greatest interest one examined the apparatus for measuring the skin friction ofair passing over smooth surfaces from observation of the velocity distribution of the surface. Another arrangementallows of measuring the skin friction of air passing over thin flat plates from observations of the momentum of the air.Finally the sound location apparatus interested many, from the possibility of utilisation in connection with commercialair routes. Useful Load Record A NEW record is now to the credit of the Handley PageW.8 with two 450 Napier-Lion engines. Piloted by "Capt. G. T. R. Hill, this machine on May 4 carried 1,674kilogs. (3,690 lbs.) of " useful load " to a height of 4,267 metres (13,999 ft.) in 1 hour 20 mins. Photographs of he ^machine and its load appeared last week. And a " Semi-Quaver " Speed Record MR. F. P. RAYNHAM, piloting a Martinsyde " Semi-Quaver " machine, with 300 h.p. Hispano-Suiza engine, on March 21 put up a new British speed record over a kilometre.His average speed both ways worked out at 259.75 kilos per hour (161.434 m.p.h.). The Certificates of Petformance ofboth these were issued a fortnight ago. 595
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