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Aviation History
1949
1949 - 1013.PDF
646 FLIGHT JUNE 2ND, 1949 "Open Day" at the N.P.L. is to be applied, and the loading results from the inertia of the mass of the structure itself and of extra masses added to simulate other distributions of loading. Static load- ing may also be applied through tension springs. The nin-square 1,500 h.p. supersonic tunnel is the most recently developed instrument in the Engineering Divi- sion for continuance of the last 30 years' work on compres- sible flow and high-speed flight. With this tunnel, work • has started on the complex subject of boundary-layer shock-interaction, which is of particular importance in the behaviour of wing /body junctions, supersonic diff users and flow duct entries. A preliminary investigation of the action of an inclined shock upon the tunnel wall boundary layer has yielded interesting results, indicating that the orthodox conception of boundary layer flow may not apply. The Engineering Division has long had an interest in ejector action for wind tunnel operation at Mach numbers of less than 2.0, and much pioneer experimental work has been done. Experiments are in progress using two-dimen- sional models investigating the flow by means of pressure measurements and spark shadowgraphs, and while inves- tigating the development of a particular ejector for the production of low pressures, methods have been devised which may be of wider application in this field of research. A transparent model illustrating the action of a ball bearing under a combination of thrust and radial load is used to show that the rate of heat generation is dependent on the angle of application of the load. The transparent races facilitate study of the motion of the balls at various angles of application of load in this slow-speed angular- contact bearing. The speed can be varied between rest and 60 r.p.m. whilst, at the same time, the angle of load application can be varied from zero to 90 deg. THE INSTRUMENT-RATING TEST (Concluded from p. 643) the checking of air speed, the readjustment of power out-put and the maintenance of altitude. An involuntary alteration of course is relatively insignificant and, anyway,is probably inevitable after an engine failure on a light twin under I.F.R. conditions. What is far more importantis the regaining of the original heading after all the other details have been attended to. After dealing with the initial circumstances of the enginefailure, the candidate is required to fly straight and level at 95 m.p.h. and carry out Rate 1 turns to the right andleft, followed by a straight descent, descending turns and then a straight climb. This completes the asymmetricsyllabus. By this time the candidate may be getting tired, sincesimulated instrument flying with amber screens is more exhausting than is flight under actual instrument condi-tions. If this should occur he is allowed to rest for a time while the instructor handles the machine. All that remainsto be done, then, is the QDM let-down, and here again the procedure is quite normal. Some pilots, however,especially those who normally operate large aircraft with correspondingly large crews, may find a certain amountof difficulty in handling the R/T side as well as the actual flying, especially as the Consul is, by some standards,rather "mushy." Here again no rigid procedures are called for and, provided the candidate can demonstrate hisability to position himself over the airfield on the required heading at the required height in a reasonable period oftime his performance will be acceptable. As with the S.B.A. test, the required height before overshoot is 500ft. That completes the syllabus for the British InstrumentRating. The test, one feels, was fairly conducted and a general attitude of "we want to pass you, not fail you"persisted throughout. Normally the test occupies between two and three hours, and afterwards a debriefing chatcovers the whole examination in retrospect, and any strong or weak points in one's I.F. are discussed. No one at Gatwick attempted to be dogmatic and allconversations were conducted with a frank interest in the candidate's point of view. Realizing that many aspects ofinstrument flying are open to discussion, the examiners are receptive to new ideas and, if some applicant has anew idea which works, no one will fail him because it has not been done before. Such an attitude might well becommended to all bodies connected with the examining of aviation candidates. ~. HOLLAND'S OPEN-AIR SHOW AN ambitious programme has been drawn up for an inter-national open-air aviation show to be held under the auspices o£ the Royal Dutch Aero Club at Ypenburg, Holland,from July 23rd to 31st. In conjunction with the show a week of flying events willbe held, commencing with the arrival of Benelux Rally partici- pants on Saturday, July 23rd, and concluding with an inter-national formation-flying contest on Sunday, July 31st. On July 24th the Andries Blitz Coupe balloon race will be held,July 25th is an aircraft-modellers' day, and July 26th, 27th and 30th will be devoted to gliding, parachuting and "sport-flying" displays respectively. It is stated that no charges will be made for exhibitionspace and that no landing or parking fees will be levied. Full details are available from the organizers, iste InternationaleLuchtvaart Show, Luchthaven, Ypenburg. Intending exhibitors and visitors will find some informationabout Ypenburg in the November 18th, 1948, issue of Flight. HELICOPTER TEST-PILOT APPOINTMENT IT is announced that F/L. John Norman Dennis has beenappointed rotating-wing test-pilot to the Fairey Aviation Company's Rotorcraft Division, with effect from June 1st. John Dennis, who is now 28 years of age, joined theR.A.F.V.R. in 1938 and served with Nos. 3 and 139 Squadrons. In 1942 he joined the Autogiro Squadron at Halton, and in1944, after taking the No. 1 Helicopter School course at An- dover, went to the Airborne Forces Experimental Establish-ment at Beaulieu, Hants, for rotating-wing research and development duty. In 1945 he was posted to R.A.E., Farn-borough, as a Service Pilot, and a year later became a civil pilot there. More than 750 hours of his 3,000 hours' flyinghave been on rotating-wing aircraft. FORTHCOMING EVENTS June 4th to 6th.—Bembridge and Sandown Aero Club : Flying Week-end. June 4th-6th.—Aero Club d'Eoernay : Third International Air Rally. (Private invitations.) June I Ith.—Royal Naval Air Station, H.M.S. "Gamecock " : King's Birth- day Review and Navy Day, Bramcote airfield, Nuneaton, Warwickshire. June I Ith and 12th.—Koyal Air Forces Association : Annual Conference, Margate. Junellch to 17th.—R.A.F. Small Arms Association: The 23rd Annual Championship Meeting. June I Ith.—Darlington and District Aero Club : Air Display, Croft airfield. June I Ith to 13th.—Yorkshire Aeroplane Club : International and Club Invitation Rally. June 12th co 19th.—Italian International Air Week, Rimini and Venice. June 16th to July 2nd.—Royal Tournament, Olympia. June 18th.—R.Ae.S. fBrough) : Flying meeting and Cirrus Trophy Com- petition, Brough. June 18th.—Parachute Regimental Association: Old Comrades' Day. Aldershot. June 18th and 19th.— Aero Club de Basse Normandie: Flers de I'Orne Rally. June 19th.—Air League of the British Empire (Portsmouth) : Garden Party, The Airport, Portsmouth. June 19th.—Cowes Aero Club: Air Display June 22nd to 24th.—Institute of Transport : Congress at Buxton. June 26th.—Northern Heights Model Flying Club : Gala Day, Hawker airfield, Langley. Bucks. June 26th to July 3rd.—Aero Club d'ltalia : International Air Week, Milan. July 1st.—R.A.F. Golfing Society : Summer Meeting at Moor Park Club, Herts. July 2nd.—R.N. Air Station, Lossiemouth: " Open Day " and Flying Display. July 2nd to 4th.—Royal Aero Club : Private air rally at Deauville. Guests of M. Andre. July 2nd to 10th.—Tour de France Aerien. July 4rii to I Ith.—Royil Aero Club : Privat* Air rally to Soain. .'uly 9th.—Royal Naval Air Station, Culham, Oxford : Air Display. July 9th.—Redhill Flying Club : Garden Party, July 16th.—Royal Naval Air Station, Anthorn, Kirkbride, Carlisle : Navy Day. July 16th and 17th.—Royal Aero Club : Private air rally at La Baule, St. Nizaire. Guests of Mme. Andre.
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