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New .40,000 B.Th.U. .Coach Heater

18th December 1953
Page 39
Page 39, 18th December 1953 — New .40,000 B.Th.U. .Coach Heater
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ANEW type of combustion heater for coaches has been marketed by the Key-Leather Co., Ltd., 5 Urswick Road, London, E.9. It is claimed to have a high capacity and to be entirely safe. Paraffin, petrol or oil fuel may be used, and the maximum output is 17,600 Cu. ft. of air per hour at 180° F., representing 40,000 I3.Th.U.

The device works on the heatexchange principle. There is no risk of combustion gases contaminating the fresh air. The combustion chamber receives finely atomized fuel which is ignited by a heater plug. Incoming fresh air is heated by the wall of the heat exchanger into which the burned gases flow.

Hot air is stated to come through ;n a minute. When the unit is switched off, it will continue.. to run for a short while until all burned gases are exhausted.

There are two stages of output—" full on" for delivery of 40,000 B.Th.I.J. per hour, and " half " for 24,000 B.Th.U. Comparative rates of fuel consumption are given as 2.5 pints per hour and L4 pints per hour, the respective differences in temperature between the intake and delivered air being 82° C. and 50° C. • The Key-Leather unit, which is German in origin, has two electric motors, one to drive the fresh-air fan and the other for the combustion-air fan and the fuel pump. A magnetic fuel valve ensures safe closure of the fuel feed when switched off. There is also a safely cut-out switch which operates should the hot air reach an excessively high temperature. In warm weather, the unit can be used for supplying a flow of cool air.

In construction, the heater consists of an air-filter intake, a tubular heatexchange and combustion chamber, and a fuel tank. It is recommended that the unit be fitted under the floor of a vehicle and lined on all sides with steel sheet.

EIGHT TRACTORS TO ONE

A CCORDING to statistics, there were 4-1. eight times as many tractors in use on the British farms in 1952 as in 1939, said the Earl Waldegrave, liaison officer to the Ministry of Agriculture, at the British Agricultural Contractors'

Association's annual dinner in London last week. In 1952 there were 407,000 agricuhural tractors in Britain.

Other speakers included the. Hon. Walter Elliot, M.P.

LEVY AND TAX AT A GLANCE

THE following table provides a ready reckoner to the amount of the transport levy and Road Fund tax payable annually on goods vehicles and traders as from January 1;— LEYLAND OILERS FOR FINLAND A N order for 200 5,76-litre directinjection oil engines has been received by Leyland Motors, Ltd., from Oy Svomen Autoteollisvvs Ab„ Finland. They are vertical units of 90 b.h.p., and are to be installed in Sisu chassis.

Councils. Disagree on London Transport

ONDON'S 28 metropolitan .1.-4 boroughs have put forward so many different suggestions for improving London Transport that their permanent organization, the Metropolitan Boroughs Standing Joint Committee, have been unable to prepare a co-ordinated case for submission to the Ministry of Transport committee of inquiry.

The standing joint committee have received 78 different suggestions, and only in a few cases does more than one council support a particular idea. Six of the boroughs favoured the introduction during peak hours of an express bus service to stop at selected points, with a minimum charge. Seven protested against " crawling."

The council of the Association of Municipal Corporations have approved without debate the general purposes committee's recommendations for the improvement and more economical running of London Transport services. The proposals were reported in The Commercial Motor last week.

NEW LATIL TRACTOR; PRICE REDUCTION

A ROAD haulage tractor, equipped /-t with a Meadows four-cylindercd oil engine, rated for an output of 58 bth.p., is to be added to the Latil range. It will be based on the forestry tractor. It is to be sold at £2,000, complete with electrical equipment, but a cab, winch and power take-off are available as optional extras.

A reduction in the price of the current four-wheel-drive all-wheel-steer tractor, which as a standard chassis now costs £2,350, is also announced.

The new model has 9.00-22in. tyres of cross-country or road-tread pattern, and the electrical equipment includes lamps, battery and horn. It is powered by the Meadows 4DC330 engine of 5.43-litre capacity, which is derated for use in the tractor. The transmission includes an eight-speed main and auxiliary gearbox driving to both axles. A feature of the Latil is four-wheel steering.


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