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Aviation History
1948
1948 - 1466.PDF
Bristol New-type 170 Bristol Rrabaxnn LATE this year the first prototype ofthe Bristol Type 167 Brabazon Ishould take the air. This huge machine— precursor of the production version(Brabazon I, Mk. II), to be powered by four pairs of coupled Bristol Proteusturboprops—-will have Centaurus piston engines. All major structural and aero-dynamic features will, however, be com- mon to both marks. The specificationcalled for 100 passengers to be carried for a still-air range of 5,000 miles (ample forthe London/New York service) in very great comfort, and the three main cabinsseat respectively 36, 32 and 32. A crew of 13 is foreseen, including at least fivestewards. All cabins will be pressurized for an equivalent altitude of 8,000 ft. Avro Tudor HPHE manufacturers' latest figures showA that the Avro Tudor IV civil trans- port, powered with four Rolls-RoyceMerlin 621 engines and loaded to a weight of 80,000 lb, has a maximum cruisingspeed of 282 m.p.h. at 20,000 ft and a maximum still-air range (with accommo-dation for thirty-two day passengers) of 2,910 miles. The Tudor III is a similarluxury aircraft equipped with a private cabin for two passengers and—in the maincabin—day and night accommodation for eight. The Tudor IV, which it is proposed toshow, is one of those supplied to British South American Airways and operatedsuccessfully by that Corporation. A freighter version (Tudor IV B) is underdevelopment. Bristol Vow Type 17O 'TpHE "1948 Model" of the Bristol 1701 Freighter/Wayfarer series incorporates a structurally stiffened wing of 10 ftgreater span than the original model, and various aerodynamic refinements to allowa substantially increased payload, a much FLIGHT longer range, and an all-round improve-ment in performance and handling charac- teristics—notably in the single-enginecondition. Another new feature is the " free exit" type of cowling applied to theHercules 672 engines, which permits the release of more airscrew thrust. Not onlydoes this cowling reduce cooling drag and improve cooling (especially under tropicalconditions) but weight is saved and oper- ation and maintenance simplified. Vari-ants offered are the Mk. XXI (Freighter), XXIA (Freighter for cargo/passengerwork), XXIIA (Wayfarer passenger air- craft), and XXIE (mixed traffic aircraft). Briwtol T.V|M> 175 ALTHOUGH no details are availableconcerning the prototypes of theBristol Type 175 " medium-range Empire " aircraft now on order, the broad require-ments—which in some instances are likely to be comfortably exceeded—can bestated. Thirty-two passengers with bag- gage and 2,750 lb of mail or freight are tobe carried. The operating height must be about 20,000 ft at which height a cruisingspeed of 320 m.p.h. is demanded. A maximum still-air range of about 2,500miles is a requirement. Chrislea Super Ace Series IIO NE of the most interesting of thepost-war light aircraft, the Super Ace is a finely finished four-seater witha nose-wheel undercarriage. Originally developed to have hand-wheel ruddercontrol (obviating the conventional pedals) the type is now offered with more con-ventional controls. The construction is of metal, except for a few minor componentsin wood, and the machine is chiefly fabric-covered, though the upper portionof the fuselage behind the cabin is dural sheeting and the wing leading edge andthe whole tailplane are metal-skinned. Good all-round visibility and exceptionalmaintenance qualities should prove strong selling points. De Huvilland Dove ONE of the most successful and popularof British commercial aircraft, theDove may be briefly described as an 8/11-passenger twin-engined transport ofall-metal construction and having a nose- wheel undercarriage. The design is ofexceptional aerodynamic efficiency, and the cruising speed on half the power ofthe D.H. Gipsy Queen 70 geared and supercharged engines is 155 m.p.h. at 5,000 ft. The main cabin is 11 ft 9 in long,5 ft 2 % in wide and 4 ft 6 in high, and in addition there is ample accommodationfor luggage. The Dove is a fine proposition for the business executive as well as theairline and charter operator. A military version of the Dove, knownas the Devon, has been developed. This model differs from the civil machine prin-cipally in equipment. De Havilland Comet AT the time of writing, no illustrationis available of this ultra-modern, pure-jet, high-speed, long-range airliner,the first prototype of which has been under construction at the de Havillandworks for several months past. It can, however, be said that aerodynamic experi-ence gained with the D.H. 108 high-speed tailless research aircraft is being incorpor-ated in the design of the Comet (D.H. Type 106), and that the power plant willconsist of four de Havilland Ghost turbo- jets rated at 5,000 lb static thrust.Cruising speeds of the order of 500 m.p.h. have been mentioned unofficially. It does not necessarily follow that, be-cause the wing of the Comet may resemble that of the 108, the airliner will likewiselack horizontal tail surfaces.
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