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Aviation History
1946
1946 - 0378.PDF
2OO FLIGHT FEBRUARY 2TST, 1940 THE INDUSTRY Pacitor FuelGauge Full Depth Reading with Electronically Operated Instrument: No Moving Parts TT is claimed by the makers that this-*- new Simmonds fuel gauge will mea- sure a mass of fuel, over all ranges oftemperatures and basic specific gravi- ties, to within 3 per cent. In addition,it is said that the reliability of the in- strument remains constant regardlessof extreme changes in flight attitude. The principle employed is simple inthe extreme. There are only three basic elements: a tank unit, which isa plain electrical condenser of parallel The three elementswhich make up the complete apparatus.On the left is a con- denser unit of theflanged type suitable for any tank. Thecentre unit contains the electronic in-stallation and the cockpit indicator ison the right. metal plates insulated from one an-other ; a unit containing the electronic components; and the cockpit indica-tor. There are no moving parts in the complete circuit other than the actualpointer. As fuel is consumed the proportionof fuel or air between the plates alters and affects the electrical capacity ofthe condenser tank units. This change of capacity is measured by the elec-tronic circuit and passed on in the form of small direct currentsto the cockpit indicator, which is a conventionalD.C. type ratio-meter. Calibration of the indi-cator dials may be either in gallons orpounds of fuel. The latter is to be preferredbecause temperature The stiffener type unitbuilt-in as an integral part of the tankstructure. affects volume whereas weight remainsconstant. There is a variety of tank units in-cluding flanged, non-flanged and quick-assembly types. These are suit-able for self-sealing, integral, and bladder tanks. A fourth type is de-signed to be a structural stiffener in addition to its normal function as anelectrical condenser. The double- purpose application of this model savesa good deal of weight. In addition there is the advantage of ideal loca-tion for minimum of position error. Empty and full adjustments areelectrically independent of one another. By actual measurement, aplus or minus adjustment of as much as 10 per cent, on the full end of theindicator produces no readable effect on the empty end of the scale. Cali-bration adjustments are carried out on the indicator without disturbing thetanks. Installation and other particularsmay be had from Simmonds Aeroces- sories, Ltd., Great West Road, Brent-ford, Middlesex. BIG CONTRACTI T is said that de Havilland's contractto supply jet propelled Vampire fighters to the Swedish Air Force is inthe region of £4,000,000. RESTARTINGM R. WHITNEY STRAIGHT, who spent a fair proportion of the war years getting captured and escaping from the Genuans, starting up A flying training scheme in London. AVIATION INSURANCEM R. C. F. HUGHESDON, who didvaluable test flying early in the war, including prototype trials on theHamilcar, and who was awarded the A.F.C. in 1944, nas been released fromthe R.A.F. and is now back as aviation director of Stewart Smith and Co., Ltd.,Lloyd's brokers. Messrs. E. G. Outram and O. V. Holmes, also recently de-mobilised from the R.A.F., have joined the same company's aviartion depart-ment. CLEARING AGENTS AIRPROP Passenger and FreightAI Services, Ltd., are now in full operation as airways clearing agents.The Board consists of Group Capt. W. A. Rollason, of Rollason Air Services, J. M.Wakeman and A. E. Lindsay. Both Mr. Wakeman and Mr. Lindsayhave been connected with* airline work for over 25 years. The former will dealwith freight traffic and the latter will look after the passenger side of, the busi-ness. The address is Terminal House, Grosvenor Gardens, London, S.W.i. FOR QUICKER JOURNEYS A TAYLORCRAFT Auster has beenacquired by Mr. C. D. Macartney- Filgate—a director of Tube Investments,Ltd.—to save time on his journeys to production conferences at the Group'smore distant works and to make quick contacts with customers in Britain andon the Continent. It is the first civilian aircraft of its type to be supplied since the war. Fit. Lt. D. G. Duval has been engaged as pilot. MODERN PRODUCTION TECHNIQUE/ T?HE necessary use of high-duty, heat--*- resisting sheet materials such as stainless steel, Inconel and nickel-chromium alloy for the fabrication of combustion chambers for aircraft g3°turbines has set new welding probkiP* for the manufacturers. Resistance weld-ing has provided a satisfactory solution, and the subject is discussed by a Lucasengineer in the March issue of Aircraft Production, appearing next Monday,February 25th. Other articles in the issue include adescription of the '' time-balanced' system used by Folland Aircraft, Ltd.,in the sub-contract manufacture of Sea- fire Components; notes on the produc-tion of the Rolls-Royce Griffon 65; and a description of the methods by whichjunior draughtsmen are trained in the Fairey Company's draughtmen's school.
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