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Aviation History
1915
1915 - 0925.PDF
NOVEMBER 19, 1915. the time to be read with the greatest ease, either by day or night. The price of this useful article, which makes a very acceptable present, is £3. Wm. Mallinson and Sons, Ltd., 130 TO 138, HACKNEY ROAD. THESE well-known timber and veneer merchants and importers of American hard woods hold large stocks of all the usual woods used in aeroplane construction, and their high standing is sufficient guarantee that timbers bought from them will be of the best quality and well-seasoned. In addition to the ordinary woods, this firm make a speciality of plywood, for the making of which they have a large factory at Labur num Street, Kingsland Road. Here they make up, among other styles, the waterproof plywood asked for in the R.A.F. specifica tions, a branch of the business which is assuming large proportions. Marsh Brothers, POND STEEL WORKS, SHEFFIELD, SUPPLY steel tension wire 01 all gauges and strengths, suitable for aeroplanes, glideis and other aircraft. In addition they keep in stock all kinds of engineers' tool steel, twist drills, hack saw blades, &c. Menday Motor Components Co., Ltd., CROWN WORKS, GATTON ROAD, UPPER TOOTING ROAD, S.W. THIS firm of general engineers make a speciality of metal propeller bosses for every make of engine. The Mears Ear Phone Co. (London), Ltd., 193, REGENT STREET, W. THE advantage of a method by which the pilot of an aeroplane is enabled to carry on conversation with his passenger in a more convenient and comprehensive manner than by means of the somewhat primitive system of deaf and dumb signalling which usually has to suffice, is too obvious to need enlarg ing upon. Owing to the (in most cases) deaftning roar of a high-powered engine telephonic communication between pilot and passenger offers considerable difficulties, but that these may be overcome has been demon strated by Mr. L. G. Hammer, of the Mears Ear Phone Co., whose "Aerophone" ap pears to make such conversation possible. This apparatus consists of two microphone transmitters and two receivers, one set being worn by the pilot and the other by the SUPPLEMENT TO versa. The receivers are provided with a switch by means of which the volume of sound may be regulated to four or eight different degrees of strength according to individual ability of hearing and the noise made by the engine. Attached to the framework of the aeroplane are two sockets adapted to receive corresponding plugs. These sockets are connected by an insulated wire, and also to the battery furnishing the necessary current. The terminals of the plugs are connected by similar wires to the two sets of transmitters and receivers. In order to exclude external noise the bell-shaped mouthpiece of the transmitter is provided, where it comes in contact with the wearer's face, with a pneumatic cushion which further serves to protect the wearer in case of accident. The whole outfit is very light, and can b; quickly mounted on any machine. Mestre and Blatge, 20, STORE STREET, TOTTENHAM COURT ROAD, W.C. THE question of a suitable flexible con nection for petrol leads on an aeroplane is one of considerable importance and a problem not readily solved. Owing to its extensive employment for other purposes rubber tubing was one of the first to be tried, but it was 1/j.lGHTj A sample of L'Etoile tubing. soon found that petrol had a highly detri mental effect on the rubber. The makers of the original petrol resisting rubber tubing L'Etoile have constantly improved their product, which is now recognized to be in the very front rank. Messrs. Mestre and Blatge, who are the sole agents in this country for L'Etoile, hold a very large stock The Mears aerophone set complete. it for nearly 300 hours continuously. A sample of ordinary rubber tubing similarly tested was found to be gclatinated after only about nine hours. Although l.'Etoilc tubing is of French manufacture its application to unions of British sizes presents no difficulties, since, when ordering stating the size of the union, the nearest smaller metric size is supplied, giving just the right tight fit. The accompanying sketch will give some idea of the construction of this tubing, which is made up of two layers of specially-treated rubber, between which is a layer ot cotton fabric. Messrs. Mestre and Blatge also sell an aluminium solder which has proved very successful. Motor Radiators, Ltd., 80, FAROE ROAD, BLYTHK ROAD, HAMMERSMITH. WITH the increase in size of aeroplanes and aeroplane engines has come the more extensive use of water-cooled motors. The question of a suitable radiator therefore be comes one of importance, and the require ments of aero radiators are naturally some what different from those obtaining in motor car practice. Thus the question of weight and head resistance for a given cooling surface has to be given every attention. Motor Radiators, Ltd. are the makers of light aeroplane radiators for all the various types of water- cooled engines in use, and aeroplane con structors who are beginuing to fit this type would do well to communicate with this firm. Mustikon, Ltd., 20, NEW STREET, CARDIFF. PROGRESS in the art of repairing tyres still goes on, and whereas a few years ago it was thought that the vulcanising plant was the only repair agency for punctures and bursts, several ingenious devices have been produced to meet the demand for a quicker method of repair. The latest development in this direction is known as the Mustikon, and its method of application is clearly shown in the sketches. In the case of a puncture, a round hole is made with the special cutting tool, the Mustikon rubber stud is inserted and the two surfaces are passenger. The transmitters and receivers are held to the mouth and ear respectively by adjustable steel bands. The transmitter of the pilot's set is connected in series with the receiver of the passenger's set and vice ranging over about sixteen different sizes and of different qualities. A sample of this tubing was officially tested some time ago, and was found to withstand the effects of petrol passing through The Mustikon Tyre-repairing Device.— Above, the rubber stud inserted ; below, the repair completed. pinched together after being solutioned, thus effectively sealing the perforation. Of course, it is necessary to clean the rubber in the region of the patch just in the same way as when putting a patch on in the ordinary way. A special point in favour of the Mustikon method is that the stud patch being all rubber is capable of stretching with the tube. Moreover, being moulded from one piece of rubber, there is no tendency for the two main portions of the patch or the stem to separate from one another. The Mustikon repair outfits include the necessary tools, a supply of rubber studs, solution and french chalk. Bernard Nicklin and Co., CROSS STREET AND UNION STREET, SMETHWICK. This firm of iron, steel and general mer chants are catering specially for the aero nautic industry and are stocking specially prepared steel sheets to meet the require ments of the Royal Aircraft Factory's Speci fication No. 9a. These sheets are kept in stock in all the required gauges and sizes, and 17
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