FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1940
1940 - 0558.PDF
i86 FEBRUARY 22, 1940 Outsize in Timken taper-roller bearings. such august beginnings but the first man to put up capital for the introduction to this country was none other than Sir Alliott Verdon-Roe. The company is now operating either directly or through agents in the British Isles, Canada, Australia and South Africa, and it is probably true to say that 75 per cent, of the aircraft built in the British Empire employ Chobert rivets in some part of the structure. The war has, of course, greatly in- creased the activity of the company and more modern, convenient and less vul- nerable premises have been occupied at No. 7, Woodfield Road, Wehvyn Garden City, Herts. Here in safer, pleasanter and more healthy surroundings, a much expanded staff is very busy. Vickers News AT a meeting of the board of Vickers,Limited, held on February 15, the undermentioned final dividends were de- clared : z\ per cent, actual, less income tax, on the preferred 5 per cent, stock. 2| per cent, actual, less income tax, on the 5 per cent, preference stock. i\ per cent, actual, free of income tax up to 6s. in the £ on the cumulative preference stock; making in each case 5 per cent, for the year ended December 31, 1939. Payment will be made on March 21, 1940. It was also announced that the Hon. R. H. Vivian Smith has been appointed a director of the company. Catalin TN view of the Air Ministry recom- •*• mendation that plastics may be used for non-stressed parts, Catalin, Ltd., Waltham Abbey, Essex, have issued a booklet giving in some detail the charac- teristics of Catalin as well as suggested methods of operation in the workshop. Catalin is a solid cast phenolic resin which can be supplied in the form of rods, sheets, tubes and special castings. It does not require any curing or season- ing, and only standard machinery, tools and manufacturing equipment is neces- sary for fabrication. It is available in a variety of colours, transparent, translucent, or opaque, and also in a water-clear form called Catalin- Crystal. Among other virtues it is claimed that this synthetic is non- inflammable, odourless and tasteless; resistart to alcohol, oils and common acids; has a high dielectric and com- pressive strength, and absorbs prac- tically no water. The specific gravity is 1.3 or 0.048 lb. per cubic inch. Catalin, Ltd., will be glad to help manufacturers in any way possible to overcome fabrication problems. Timken Outsize BRITISH TIMKEN, LTD.., have re-cently manufactured some special tapered roller bearings for application to some large lathes built by Craven Brothers, Ltd., of Manchester. In spite of the great dimensions ot these hearings which are 8i£in. by 6/in by 5iin., and the comparatively light section of the components, they are manufactured to the same high degree of accuracy attained by standard Timken bearings. This in itself is an eloquent testimonial to the quality of British craft- manship, especially in these days when we are only too prone to give other countries credit for qualities they do not always possess. Highly specialised plant is required for the manufacture of tapered roller bear- ings of these large dimensions and con- siderable foresight was shown by the com- pany in the installation of the necessary machinery some years ago in anticipa- tions of the demand. Aerodrome Drainage A LTHOUGH, nowadays, the Censor •^~* asks us to refrain from referring to the weather this is still with us and rain- fall will be much the same as it is in peacetime, and if too much arrives aero- dromes will be rendered unfit owing to flooding. Be that as it may, investiga- tion has shown that the average amount of surface water to be disposed of from aerodromes in temperate climates is in the nature of seven pints per second per acre. The condition of the surface is governed by whether this is carried away by near-surface drains or whether it is allowed to percolate to a deep drain and so render a strata, perhaps three feet deep, sodden and unstable. Obviously if near-surface drains are to be used they must be made considerably more robust than the usual earthenware pipes to with- stand the impact loads of landing and taxying aircraft which tend to increase as time goes on. The Air Ministry has now given its approval of the Satujo method of drain- age—a French system—which is being developed in this country by Haider Con- struction, Ltd., Harbrook, Ramsbury, Wilts. The process involves the casting in situ of cylindrical pipes, the upper half in highly pervious and the lower hall in impervious concrete. First, a trench is dug some igin. deep and the impervious half is laid in and shaped to the desired half circle by a special tool to form the lower half oi the pipe. Next, along this half pipe is laid a length (usually 70 yards) of rubber tube which is then inflated. Over this is poured highly porous concrete, con- taining no sand, to form the upper and pervious half oi the pipe. After setting the moulding tube is deflated and with- drawn, leaving a jointless pipe. The re- mainder of (he trench is then filled in with gravel and returfed. These porous pipes are generally of 3m. internal diameter and serve as primary drains to a system of larger collector pipes which may, of course, be laid as deep as is necessary to maintain the desired off flow of water. The Haider Construction Company is prepared to advise on drainage problems and give any technical assistance which may be required. Napier Balance SheetF OR the year ending September 30, 1939, D. Napier and Son, Ltd., re- port a trading profit of /158,079, which, with the balance brought forward from the previous account makes a total of ^200,929. Dividends on the ~j\ per cent, cumulative preference shares and 8 per cent, non-cumulative preference shares absorbs £37.060, and the directors re- commend a dividend of i\ per cent., less tax (which will require a further ^26,618). The balance to be carried for- ward to the current year's accounts is £137.251- Slow Motion TN describing the " Fesa" welding -*• apparatus in our issue dated February 8 we inadvertently gave the maximum welding speed as 2^in. per minute, this, of course, should have read 27^in. per minute. It is particularly unfortunate that the figure 7 should have been left out because speed of operation is one of the major claims for this apparatus. Diagram of Satujo jointless drain pipe, laid for special top surface as well as deeper drainage. The top 2in. of gravel can be cemented to prevent skidding of landing aircraft. 13866. 16154. 17628. 21362 22320. 22679. 22686. 22720. AERONAUTICAL PATENTSPECIFICATIONS (Published February 9, 1940.) 1938 LANGLEY, T. \V\. and TECAUMIT, LTD. In-strument for indicating the attitude and behaviour of aircraft in flight (517,563).HARLEY, F. B. Means for varying the angle of incidence of aeroplane wings.(517,419). SHORT BROS. (ROCHESTER & BEDFORD), LTIJ . and MATTOCKS, A. U. Hulls offlying or motor boats. 1517,515;. WKSTI.AXD AIRCRAFT, LTD., and PFTTER,VV. E. W. Aircraft (517,422). MASCHINENFABRJK AVGSBURGXI i.-.H.m; AKT.-GJS. Diesel engines (517,432/. SUEVLIN, J. T. (SIEMENS APPAR.VU-: Una MASCHINEN GF.S.). Electrical compassesfor.air or other rraft. (517.551).' MARCONI'S Wmm»- TH.!I;KAPH CO.. LTD.,and COCKEREII, (.'. S Radio direction- finding receivers. (517,580). HOI.T, ('. F. Horizontal-keeping tables orplatforms for instruments, artillery, and the like, for use in moving vehicles, in-cluding aircraft and watercraft. (517.5.54). ASK\NIA-\VERKK, AKT.-GES. Gyroscopicinstruments '.117.587).
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
