FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1928
1928 - 0631.PDF
JULY 5, 1923 " Jaguar " and the " Lynx " have the same cylinders,pistons, connecting rods, etc., so that a firm or nation using one type can add the other without needing to increase toany material extent the number of spares carried. The "jaguar" is a 14-cylmder. two-bank radial, with thecylinders in one bank staggered in relation to those in the other so as to assist cooling. The cylinders have barrelsmachined from a steel forging, and are so designed that their upper ends butt up against a shoulder in the aluminiumcylinder head and thus form gas-tight joints. The barrel is secured to the head by a lock nut, which appears externallyas a radiating fin. The pistons are of aluminium alloy and Oil pipe junction piece.' Retrol pump Fitted Petrol pump fitted here. Tachometer drive. Gun gear generators. -Flange seating attached to rear cover Bevel gear drive [" FLIGHT " Sketch The Armstrong-Siddeley " Jaguar " : Sketch showingthe new auxiliary drive unit, which is mounted on the back of the engine and takes the place of the drivesplaced on the front of the engine in earlier models. have two compression rings and two scraper rings. Inboth the " Jaguar " and the " Lynx " there is a master connecting rod with six auxiliary rods, but in the largerengine there are of course two sets of these, working on two cranks set at 180'. The leading particulars of the " Jaguar " are as follows :Bore, 5 in. (127 m.) ; stroke, 5-5 in. (140 mm.) ; sweptvolume, 1,512 cub. in. (24-781 litres). The power varies accordingto the series, from 385 b.h.p. to 425 b.h.p. at a normal speed of 1,700 r.p.m. The petrol consumption is 0-56 pints per h.p.per hour, and the oil consumption 0-025 pts./h.p./hr. The weight of the engine dry is 770 lbs. (348 kg.). The leading particulars of the " Lynx " are : Bore, 5 in-(127 mm.) ; stroke, 5-5 in. (140 mm.) ; swept volume, 756 cub. in. (12-395 litres). The power varies, accordingto series, from 200 to 225 b.h.p. at a normal speed of 1,900 r.p.m. The petrol consumption is 0-56 pt./h.p./hr., andthe oil consumption 0-925 pt./h.p./hr. The weight is 480 lbs. (217kg.). The " Mongoose is a medium-power five-cylinder radialair-cooled engine of similar general design to the successful Jaguar " and " Lynx," and having the same bore andstroke, i.e., 5 in. and 5-5 in. respectively. With only five cylinders the gaps between them are large, and notonly good cooling but an excellent view is obtained. The engine is of a power which should find many uses, and fillsin the gap between the " Lynx " on one hand and the Genet " on the other. With a volume of 540 cub. in. [" FLIGHT " Sketch A recent refinement : Increased durability is ensured by this new arrangement of the push rod/rocker arm contact on the Armstrong-Siddeley " Jaguar.'' (8-85 litres) and a compression ratio of 5 to 1, the " Mongoose "develops 125 h.p. at the normal speed of 1,620 r.p.m. The petrol consumption is 0-58 pt./h.p./hr., and the oil con-sumption 0-025 pt./h.p./hr. The weight of the engine is 340 lbs. (153-8 kg.). The "Genet" is, like the "Mongoose" a five - cylinderradial air-cooled engine, but it has smaller parts than those of the " Mongoose," with a bore of 4 in. (101 -6 mm.) anda stroke of 4 in. (101 -6 mm.). The volume is 251 -2 cub. in. (4-14 litres), and the compression ratio 5-2 to 1. The" Genet " develops 80-88 h.p., and the normal speed is 2,200 r.p.m. The petrol consumption is 0-58 pt./h.p./hr.,and the oil consumption 0-03 pt./h.p./hr. The weight of the engine is 176 lbs. (80 kg.) " The Short Cut "—or the Slip and the Cup IN the verses of " The Droning Hawk " on page 482last week a " p " inadvertently appeared in the fifth line from the bottom of the first column instead of a " t,"thereby befogging the sense, as will be seen by substituting " Cut " for " Cup." Air Mail Service to Persia THE Postmaster General announces that a through weekly air mail service has been established with Persia via Russia and is available for all classes of correspondence, except parcels, under the usual conditions. Time of posting at London Chief Office : 6 a.m. every Thursday. Time of transit : About five days to Teheran, eight days to Bushire. Special air fee (in addition to ordinary postage) : Is. Qd. per ounce. The existing services to Persia as shown in the Air Mail Leaflet (obtainable at or through any Post Office) remain unchanged. Our Air Mail " Stamps " THE Postmaster-General, replying to a question by Mr. Lansbury regarding the supply of stamps or labels for use on British air mails, stated in the House the other day that air mail " labels" were supplied to all largeoffices and to smaller offices at which there was a demand for them. He added he would arrange for the labels to beavailable in future at all offices, and that ordinary postage stamps were used to prepay the air mail fees. But, why nothave special air mail stamps like other civilised nations ? Seaplane Rescued AM R.A.F. seaplane, with Flight-Lieuts. A. Stevensand C. A. Turner, Air Mechanic Long and Wireless Operator Geddes on board, nearly foundered with its crew on June 30off the Welsh coast. It left Pembroke Dock in the morning to take part in manoeuvres at Walney Island, Barrow.Engine trouble developed and a forced landing was made in the sea 22 miles east of Bardsey Island. For 3,| hoursit was buffeted about, and when about to founder a drifter, Kittiwake, appeared and took the crew on board. Threeof the men were on one wing when sighted and the wireless operator was still in his cockpit. R.A.F. Music in Canada THE R.A.F band, under Fit.-Lieut. J. H. Amers, landedat Quebec on June 29 from England for the Canadian tour which commences at Vancouver shortly. 579
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
