FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1921
1921 - 0028.PDF
JANUARY 13, 1921 provided for the cargo compartments. The tail skid is mounted on a swivel post and secured for shock absorption cable. A gravity tank is provided in the upper wing overeach motor, and a sight-glass in the overflow line enables with f-in. elastic cord and f-in. rebound rubbers. The skid the pilot to determine at all times,,whether petrol is beingis of hickory, provided with a cast steel shoe. All walls of the fuselage, not built with plywood, are covered with grade " A " linen, doped and finished in khaki enamel. The pumped to the gravity tank. The entire petrol system is designed to withstand a pressure of 5 lbs. per square inch. THE GLENN L. MARTIN COMMERCIAL TRANSPORT: Side elevation of the fuselage, showing .--.-», . --..•; arrangement of cargo compartments. exterior plywood walls are also finished with khaki enamel; the interior wood parts are filled -and varnished ; interior metal parts are zinc plated, are covered with blue lacquer or both ; the exterior metal parts are zinc plated and enamelled in khaki ; wearing surfaces, etc., are greased. The landing chassis is attached under the fuselage and engine nacelle, and consists of two 44 in. b ' 10 in. wheels and two nickel steel tubular axles. The axles are held in place laterally by the medium of sway braces attached under the fuselage, and support the machine by means of "A" struts. These struts are vertical, two being attached under each nacelle. The landing gear " A " struts are of nickel steel tubing, and are braced from the rear. Each wheel is shock- absorbed with f-in. elastic cord, and the shock absorber is enclosed in a streamline case ; mud guards are provided for each wheel. The landing gear " A " struts are streamlined with wood and covered, where necessary, with grade " A " linen, doped and finished in khaki enamel. The sway braces are streamlined with aluminium and magnesium fairing, and are provided with steps to facilitate work upon the motor when the engines are not running. Each engine is mounted in the forward portion of its nacelle. The engine bed is built in the top of a vertical plywood bulkhead, braced laterally by a horizontal plywood bulkhead, connecting it to the nacelle longerons. A sloping bulkhead connects the forward end of the' engine bearers to the front spar of the wing. The oil tanks are carried beneath the motors. The batteries are carried beside the starters at the rear end of the motors. Directly behind the rear end of the starters is an aluminium covered plywood fire wall, which runs from the top to the bottom of the nacelle. On top of the fire wall and outside of the nacelle is the radiator. Behind this fireiwall, and separated from it by an air space, is the petrol tank. The latter ends at the rear spar where there is another vertical bulkhead. Behind this bulkhead is a fairing to streamline the nacelle. A removable cover is provided for this, making it available for the storage of tools, etc. Detachable cowling is also provided over the motors. All cowling on the nacelles is sheet aluminium. The engine controls are carried to the fuselage through the wings, being run over pulleys at the nacelles and at the inner end of the wings and being run through straight aluminium tubes between these points. All controls are standard of the Martin Commercia 74 ft. 43 ., 2 ins. 8 ,. The general specification Transport is as under :— Span, overall, both wings Length, overall Height, overall Chord . . . . . . .. .. ., ,, 7 ,, 11 Gap _ . . • .- ' 8 ",, 6 Dihedral angle 1760 from folding hinge out in lower wing Angle of wing setting to propeller axis Wing curve Upper wing area, including ailerons Lower wing area, including ailerons Total wing area, including ailerons Ailerons (4) Elevator area Stabiliser area .. .. . . • Rudders (2) .. ,.---. .. Fins (2) Total weight of machine, fully loaded Weight of machine, empty Total useful load Crew (pilot and mechanician) Cargo capacity Weight carried per sq. ft. of supporting surface Weight per brake h.p. Fnel capacity (2 main tanks) .. Gravity tanks (2) . . . . . . ^ . , Oil capacity (2 tanks) Speed, maximum, horizontal flight Speed, economical Speed, minimum landing Climb from sea level in 10 rains., fully loaded Radius of operation, fully loaded under full power, 4|hrs. Radius of operation, at cruising speed .. 600 miles. . Ceiling 13,000 ft. . The equipment includes :•— Air speed indicator, oil temperature thermometers, altimeter compass, water temperature thermometers, clock, self-starters, inclinometer, navigation lights, lateral indicator, instrument lights, tachometers, trouble lamps, petrol level gauges, fire extinguishers, oil pressure gauges, ammeter, compass, all necessary switches, wiring, etc., safety belts, life preserver seat cushions, thermos bottles. ' • / * Albatros. 577 sq. ft.544 .. 1,121 ,, 130 ',, 43 62.25..39-5 .. 18 12,000 lbs. 6,840 ., 5,160 ,, 360 ,, 3,000 ,, 10.7 „ 150 .. 280 gals. 20 ,, 22 ,, no m.p.h. 100 _,, 52 .. 5,000 ft. Aviation in Queensland NEGOTIATIONS have recently been completed in South Queensland for an aviation scheme of much concern in Queensland. A company with a nominal capital of ^100,000 has been formed, backed largely by Queensland pastoralists, for the purpose of establishing a-regular aerial service between the outback stations and the railheads. The first two aeroplanes have been flown to the main base at Wintor. The company promises to establish depots at Wintor, Long- reach, Charleville, and Cloncurry, and to maintain a regular mail and passenger service between those four railheads. In addition, however, the Federal Government has been asked to co-operate by establishing or subsidising aerodromes at Camooweal, Avon Downs, Anthony's Lagoon, Newcastle Waters, and at Katherine, connecting with Darwin by rail. This scheme would bring Darwin to from ten to twelve days closer to Melbourne than it is at present. By train from Melbourne to Charleville is about four days' journey; from thence to Katherine by aeroplane could be accomplished in about .three days, with an extra day for the train journey to Darwin. Thus the journey, Melbourne to Darwin, and back, could easily be accomplished inside three weeks, even allowing two or three days for business at Darwin. A triplane will be used for a twice-weekly service between Charleville and Cloncurry. The aeroplanes, which will carry a pilot and two passengers, will be used principally for ordinary services between the scattered homesteads of Central Queensland and for general .business purposes in place of motor-cars. As the service develops, aeroplanes and spares will be stationed at Longreach, Winton, Cloncurry, and Charleville. 28
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
