FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1971
1971 - 0015.PDF
14-15 FLIGHT International, 7 January 1971 INDUSTRY International Products Company News Marconi's new diode A tiny diode, developed by Marconi, is claimed to have a higher performance than any other available in the world. This has made possible some of the most significant advances in recent tele-._ communications technology. The diodes are at the heart of new Marconi equip ment which will transmit over a quar ter of a million speech channels on a single carrier, and they also enable giant radio telescopes to probe to the very edges of the known universe. The diode is a gallium arsenide type, capable of operating over very wide bands, at frequencies as high as 60GHz. This is crucial for the trans mission of enormous quantities of speech or data on a single carrier. Based upon original design work by the Services Electronic Research Laboratory, Baldock, the diode has been refined and perfected by the Mar coni Research Division. It is built into a square package, making it simpler to install into striplines and wave guides, in a double diode configura tion if required, and is suitable for refrigerated operation. The diode is available on short delivery with three figure of merit ranges from 40GHz to 90GHz, at prices from £75 to £250 each. , Dunlop union approved Proposals to effect the union of The Dunlop Com pany Ltd and Pirelli SpA and This electron micrograph shows the junction of the Marconi diode magnified 1,000 times. The circular "mesa" or plateau which is formed on the gallium arsenide chip (the light foreground mass) can be clearly seen bonded to the gold connector above. At the some scale, the thickness of a single human hair would practically obliterate the picture area Societe Internationale Pirelli, have been approved by Dunlop share holders. In seeking acceptance of the pro posals which essentially provide for Dunlop to acquire a 49 per cent interest in Pirelli's operations in Italy and other EEC countries and 40 per cent elsewhere in the world, in ex change for the transfer to Pirelli of equivalent interests in Dunlop's opera tions, Sir Reay Geddes, Dunlop's chairman, describes the union as "the logical response of two major groups to the changes taking place in their industries and in their world markets." The competitive strengths of the two groups will be enhanced, says Dunlop, in several ways: both manufacture and sell internationally and each is a leader in fast-growing product lines many of which, like tyres, are common to both. Together, they will have a combined turnover of nearly £900 million. Dunlop and Pirelli each spends about £8 million annually on R&D. Rate-sensing by wire Engineers at Honeywell's Aerospace Division in Minneapolis have developed a possible replacement for the gyroscope. Called a vibrating-wire rate sensor, the new device is claimed to have a working life, without repair, equal to that of existing air- and spacecraft—and up to ten times that of conventional gyroscopes. The sensor works by detecting the- effects of turning movements on a tiny vibrating wire strung between mag netic fields. The wire is of beryllium- copper, two inches long, stretched taut within two magnetic fields: one pro vides drive impetus, and the other generates output signal. A second wire is strung at right-angles at the mid point of the first wire and earthed to separate electrically the drive and output signals. The device has been in develop ment at Honeywell for about five years and the company has built 36 for test purposes. In performance figures, there is a noise threshold in the output signal of 0.02° per second. Linearity is now 1 per cent, with reduction to 0.5 per cent expected. LSI in Falcon 10 The Astek Division of Lear Siegler Inc, Armonk, New York, has announced that Avions Mar cel Dassault has selected the division to supply a complete package of alti tude and airspeed instrumentation for the Falcon 10 executive jet aircraft. These include a self-contained servo pneumatic encoding altimeter; pneu matic digital altimeter; altitude alert ing controller; Mach/airspeed indica tor; overspeed limit sensor. Plastic Pallet A long-felt demand by British industry for a non-expendable pallet which is both durable and reasonable in price has now been met by a new plastic pallet marketed by SSI Fix Equipment of Basingstoke. The new pallet is claimed to abolish the high costs of pallet repair now suffered annually by almost every type of industry. SSI's pallet is being marketed in dimensions of 40in x 48in, still the commonest pallet size in Gt Britain. It has a four-way method of entry, with tare weight of 251b, a loading capacity of one ton evenly distributed, or 15cwt evenly distributed, supported sides only. Ardrox Ltd, Commerce Rd, Brent ford, Middx, has developed a new fluorescent lacquer, ARDROX 8-385, for use with black magnetic particle fluids in the inspection of ferro magnetic alloys in difficult visibility. APV-Bowser Filtration Ltd of 74 Purley Way, Croydon, Surrey, has produced a range of aviation fuel filter/monitors designed to provide an efficient fail-safe monitor for installa tion immediately prior to the point of discharge from the refueller or dis penser. A unit can handle flow rates of 12.5 to l,000gal/min, removing all particulate matter and free water from aviation kerosene. PEOPLE AND POSTS Mr Dennis J. Millard has been appointed managing director of Dowty Boulton Paul Ltd. Mr G. C. D'Arcy Biss has retired as chairman of The Fairey Company Ltd and Sir Joseph Hunt has been elected the new chairman. Mr R. W. Holder has been made managing director of The Fairey Com pany Ltd, which is the holding com pany of the Fairey Group. Ransome Hoffman Pollard Ltd has appointed Mr Donald Pike to be general manager of the General Bear ings Division. Mr Laurence A. Curry has been made a director of SGS (United Kingdom) Ltd, and will act as a con sultant to the company. Mr Giuliano Costamagna has been appointed general manager in succession to Mr Curry.
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
