A.E.C.

12th November 1929, Page 150

12th November 1929

Page 150

Page 150, 12th November 1929 — A.E.C.

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BY reason of the fact that every model on this stand is entirely new in design, visitors to the Show find even more than usual to interest them in the products of this important concern. Three different types are displayed, two being passenger-carrying machines, whilst the third vehicle is typical of the new goods range consisting of four chassis, having pay-loads from 3i tons to 8 tons.

Designated the Regent is the new double-decker for 50 passengers. The model shown has an overall height of 12 ft. 10 ins. laden ; to attain this modest dimension the seats in the upper saloon are arranged in banks of three and there are gangways on each side. The centre gangway of the lower saloon allows 5 ft. 10 ins, of headroom.

Nickel-steel side-members are used for the frame of the Regent ; these have a maximum depth of 11, ins, and are braced by tubular cross-members. The frame height is 1 ft. 9 ins., whilst the platform

height is 11 ins. The front of the engine is mounted upon a tubular member, and the rear end is -bolted to a flanged bridge-member.

The power output of the six-cylindered engine is 95 b.h.p. An overhead camshaft is employed, the drive to it being taken through a duplex-roller chain and a split gearwheel ; all anxilitiries are on the near side. The cylindrical oil filter is carried in the sump casting in an isolated chamber. The Still radiator is mounted upon the crankcase and is insulated from all frametorsion.

A single-plate clutch, with an adjustment device below the cab floor, conveys the power to the four-forward-speed gearbox, which has an Elektron casing. For the final transtaission a two-piece. propeller shaft is used ; this drives an underslung-worm-type axle with an offset pot.

B12 Service braking is on all four wheels ; a vacuum-servo motor augments the driver's effort. Marles steering, semielliptic springing and rebound dampers are other items in the specification. The wheelbase of the Regent is 15 ft. 6i• ins.

A smaller machine is the Regal, which

is exhibited as a 30-seater bus and as a show-finished chassis. The maximum number of seats which this chassis can carry is 35. In general design it follows the Regent. A similar offset enginegearbox unit is installed.

Having a permissible pay-load of six tons is the new Majestic lorry ; this is of the normal-control type. The engine is of the same design as that of the two passenger machines already described, but the bore is 10 ram. larger, giving an output of 110 b.h.p. The crankshaft runs in seven bearings. A four-speed gearbox is mounted on the rear face of ' the clutch pit ; it gives ratios of 4.37, 2.69 and 1.59 to 1 on the indirect gears.

Double reduction is provided in the rear axle; both the spur and bevel gears are of the helical type, ensuring silence. Four-wheel brakes are provided on pneumatic-tyred models, a Dewandre servo being installed. The standard tyres are of 40-in. by 8-in. dimensions, but '42-in, by 9-in. tyres can be used. Marles cam-and-roller gear controls the front wheels and a lock of 45 degrees is allowed. A towing hook is built into the rear cross-member of the frame.

The sectioned engine has been prepared with exceptional care and is well worthy of a thorough inspection. The oil pump is arranged to deliver a measured quantity of lubricant at a low pressure to the overhead valve gear. The water pump has a conical water-retaining gland which is spring loaded. The metal cone bears against a graphite face. The complete pump can be removed quickly and the delivery to the cylinder block is through a cored passage and •a metal pipe.

The dynamo bracket is designed to carry, generators of various sizes;an engine fitted to a double-deck bus will have a larger dynamo than one installed in the chassis of a coach.