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Aviation History
1961
1961 - 1224.PDF
326 Rotax three-motor linear actuator NEW from the ACCESSORY INDUSTRY . . the drogues from the main parachute andat the same time releases all harness locks. This secondary mechanism is pro-vided for use in the event of the auto- matics failing as a result of collision orco-nbat damage. The H5-1 and H5-2 seats for thePhantom 2 are typical of the Mk 5 series ejection seats introduced in 1957 to meetthe requirements of the United States Navy. In general, these seats conformto the same basic pattern as the Mk 4, but the structural strength has been in-creased to withstand crash deceleration loads of up to 40g. A feature of thisseat is its quickly detachable seat bucket, incorporated in order to facilitate aircraftservicing without disarming and removal of the ejection seat. Morfax Ltd Well known in the aircraftindustry for their engine assembly and servicing stands and other maintenanceequipment. Morfax have extended their engineering work in new directions. Oneis the production of radar aerial systems, all aspects of the work from initialdesign to final testing being covered. Projects already completed range fromsmall systems for fighting vehicles to height-finding equipment with parabolicreflectors 35ft long and of 280sq ft sur- face area. Other new departures include thedevelopment, in collaboration with the MoA. of a method of machining the"difficult" steels by use of CO2 as a coolant: and the establishment of a verycompletely equipped test-house, both for their own use and for that of theircustomers. Normalair Ltd A recent developmentby Normalair is a seat-mounted oxygen regulator system. Devised specifically forhigh-performance aircraft with ejector Normalair seat-mounted oxygen regulator system seats, this system leaves valuable panelspace free for other purposes. Every component is mounted on the seat itself,including the regulator, which is supplied with oxygen from the main gaseous orliquid storage. In the event of the pilot having to eject, an emergency cylinderof gaseous oxygen attached to the seat automatically comes into operation untilthe seat leaves him at a safe, respirable altitude. Palmer Aero Products Ltd Two recentdevelopments by Palmer are convoluted p.t.f.e. flexible piping and an automaticprocess for orbitally welding preformed pipes to end fittings. "Penflex" con-voluted piping will be seen at Farn- borough in the form of a lightweightlow-tension electrical harness. Suitable for conduit work for electrical cable—where an axial collapse property of 20 per cent allows easy access to thebacks of plugs for the attachment of cables to pins—Penflex is stated to haveunlimited shelf life, to withstand tempera- tures from —70°C to over 200°C, toresist kinking, and to be dimensiqnally stable. Bore sizes range from iin toAi Plannair Ltd A recent introduction byPlannair arc blowers to supply air to pilots' pressure suits. They are in courseof development under contract for the US Navy and Air Force and will beshown at Farnborough together with other Plannair products, the latter includ-ing five different types of air-conditioning blowers for the Vickers VC10. Also onview for the first time at Farnborough will be the "Pres-Loc" quick-releasespring-loaded fastener, for securing instrument and other panels. Vibration-and shock-proof, and particularly useful where there is a call for the frequentand easy removal of panels, these fasteners are available with either pro-jecting or flush release buttons. Prec'sion Forgings Ltd This companywill be showing at Farnborough for the first time under this, its new, name.Formerly it was the Blade Division of Garringtons Ltd. a member of the GKNgroup. Turbine and compressor blades, and a wide variety of precision-forgedcomponents in steel and non-ferrous metals, are now being produced in thefactory established last year at Cwmbran, Mon. The company has evolved forgingmethods which allow blades to be pro- duced to finished dimensions withoutnecessity for any machining operations on the aerofoil surfaces. Precision Rubbers Ltd claim that theycan now offer the widest range of grades of silicone rubbers available in Europe.Their Prescolastik range comprises general-purpose, high- and low-tempera-ture, high-tensile, low-compression-set and fuel-resistant grades, as well asHTP-resistant compounds and other special grades. R. B. Pullin & Co Ltd At Farnborough, R. B. Pullin will be showing to the public for the first time a com-plete dipping Asdic equipment. Lowered into the sea by a hovering helicopter,this type of detector provides range and bearing of a submarine or other sub-merged target. New among many Pullin meters and servo components is a miniature size 08 d.c. motor to drive an 08 synchro. FLIGHT, 31 August 1961 Miniaturization is the keynote of severalnew instruments by the associated com- pany Measuring Instruments (Pullin)Ltd; they include voltmeters and am- meters of vertical or horizontal "edge-wise" type, with lin scale. Pyrene Co Ltd Improved fire-detectionand indicating units, aimed towards smaller sizes and lower weight, have beendeveloped by Pyrene and are being fitted in fuselages, fuel bays and engine nacellesof Cornets, Britannias, Vanguards and other well-known aircraft. There havealso been additions to the range of Pyrene hand fire extinguishers for air-craft use, fillings including dry chemical, chlorobromomethane and bromochlorodi-fluorme thane. R.F.D. Co Ltd A new method ofautomatic inflation of the S.S. Mk 5 single-seat liferaft is being developed byR.F.D. in conjunction with the Walter Kidde Co. The object is to relieve thepilot of as much mental and physical effort as possible. Provided he can ejectsuccessfully from his aircraft the rest can be left to the liferaft. The raft isequipped with a small-diameter high- pressure tube attached to the outside ofthe main buoyancy tube. The h-p tube inflates first and spreads the dinghybeneath the pilot ready for inflation after a pre-determined interval. Rotax Ltd. Among new electricalgenerating equipment, an outstanding development is a range of 400c/s staticinverters utilizing silicon-controlled recti- fiers, which have been designed to replacerotary inverters and their associated control panel. By utilizing silicon-controlrectifiers it is possible for large power inverters, able to withstand high voltagesupply transients and with large over- load capabilities, to be produced with-out paralleling semiconductor elements. Reliability is also improved, since fewercomponents are required in the control circuits and the inverters have highertemperature ratings. The present range of static inverters includes 75, 350 and1.000VA units for single-phase systems and 1, 3 and 225kVA for use in three-phase systems. Among rotating machines, particulareffort is being applied to the develop- ment of brushless alternators, some ofwhich can operate frequency-wild over a wide range of speeds. One of thelargest brushless alternators is a 50kVA unit, while another has a continuousrating of 144A at 208V at 6.400 r.p.m. at 0.8 power factor and incorporates blastand fan cooling together with an over- heat detector. Rotax have produced anew electric starter for the Rolls-Royce Tyne turboprop, which is rated for oneminute at 17.5 b.h.p. at 2,250 r.p.m. operating on 28V d.c. The companyhave continued to develop a wide range of control and protection units, switch-gear and timers, miniature motors and electric actuators of all kinds. Anaccompanying photograph shows an un- usual linear-output actuator driven by nofewer than three motors. Two of the motors are a main and auxiliary driveoperating at 28V d.c.. while the other is a 115V, 400c/s a.c. drive normally usedin conjunction with a servomechanism. L. A. Rumbold & Co Ltd have duringthe past year introduced a series of double and treble aircraft units suitablefor exceptionally high-density seating arrangements. Available in both fixed
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