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Trojan (automobile)
Encyclopedia
Trojan was a British
automobile
manufacturer. Cars with the Trojan marque were made from 1914 and 1974.
, South London. He got the idea to make a simple, economical car that would be easy to drive and started design work in 1910.
In 1913 the prototype was ready. It had a two-stroke engine with four cylinders arranged in pairs, and each pair shared a common combustion chamber
- a doubled-up version of what would later be called the "split-single
" engine. The pistons in each pair drove the crankshaft
together as they were coupled to it by a V-shaped connecting rod
. For this arrangement to work, it is necessary for the connecting rod
to flex slightly, which goes completely against normal practice. The claim was that each engine had only seven moving parts, four piston
s, two connecting rod
s and a crankshaft. This was connected to a two-speed epicyclic gearbox, to simplify gear changing, and a chain to the rear wheels. Solid tyres were used, even though these were antiquated for car use, to prevent punctures and very long springs used to give some comfort.
Before production could start war broke out and from 1914 to 1918, Trojan Ltd, as the company had become in 1914, made production tools and gauges. In 1920 the first series of six cars were made from a works in Croydon
and the final production version was shown at the 1922 London Motor Show
. An agreement was reached with Leyland Motors to produce the cars at their Kingston upon Thames
factory where work on reconditioning ex RAF wartime trucks was running down. This arrangement would continue until 1928 when Leyland wanted factory space for truck production. During the nearly seven years of the agreement 11,000 cars and 6700 vans were made.
the car had a punt
shaped tray which housed the engine and transmission below the seats. The transmission used a chain to drive the solid tyre shod wheels. The 1527-cc engine to the ingenious Hounsfield design was started by pulling a lever on the right of the driver. To prove how economical the car was to run, the company ran the slogan "Can you afford to walk?" and calculated that over 200 miles (321.9 km) it would cost more in shoes and socks than to cover the distance by Trojan car.
A modified car was released in 1920 with a smaller 1488-cc engine to bring it into the sub 1.5 litre class and with pneumatic tyres available as an option. The car was guaranteed for 5,000 miles. A major contract was agreed with Brooke Bond
tea for delivery vans making the car familiar all over Britain and with a top speed of 38 mph (60 km/h), not causing too much worry over speeding drivers.
and had only rear wheel braking and was beginning to look very old fashioned and although new modern bodies were fitted only about 250 were sold. A final attempt was the Wayfarer of 1934 with the engine back in the middle but now with three speed gearbox and shaft drive but only three were sold and the 6 cylinder Mastra did no better with only two produced. The original van continued to sell well however and the Utility car could still be ordered, the last one was delivered in 1937.
Leslie Hounsfield had left the company in 1930 to set up a new enterprise making amongst other things the "Safari" camp bed which would be made in thousands during World War II
.
Trojan Ltd continued to make vans until war broke out and during hostilities made bomb racks and parachute containers. With peace, van production restarted still with the original engine until 1952 when it was replaced by a Perkins diesel.
In 1959 the company was bought by Peter Agg and from 1960 to 1965 he built under licence Heinkel bubble car
s selling them as the Trojan 200, the last vehicle to bear the Trojan name. The company acquired the rights to build the Elva
Courier sports car in 1962, producing 210 cars between 1962 and 1965 when production switched from road cars to the Mclaren-Elva racing car.
The company still exists, though no longer operating from the Croydon
factory which has been sold.
The Trojan Lambretta group was founded in 1959 when Lambretta Concessionaires Ltd took over Trojan Ltd, one of the oldest firms in the British motor industry. At about the time the group owned the Clinton Engine Corporation of Maquoketa, Iowa
, USA.
Clinton were world famous for their engines used in lawnmowers and chainsaw
s. At this time many were supplied for use in portable generator
s, paint sprayers etc.
During the late 1950s the British public were becoming aware of the craze sweeping teenage America – karting (or go-karting). The sport arrived in Britain with US servicemen bringing outfits over and even making their own.
At first, the most popular engine was the 2.5 HP 95 cc Clinton engine – being both readily available and cheap. By 1959 Trojan began making the Trokart using this engine and sold as a kit to avoid purchase tax, it sold for only £25. By 1963 it was estimated that 250,000 engines in the US and 10,000 in Britain had been sold; all for karting.
The first printed mention of the Trobike is June 1960 and the first road test published on Thursday 22 December 1960 in Motor Cycling with Scooter Weekly. The price then quoted was £35 in kit form although two adverts in 1962 quoted £29.
By November 1961 the factory, also producing the Lambretta scooters, had also tooled up to produce the Heinkel
three-wheeled bubble car
, then known as the Trojan Cabin Cruiser. It seems that the Trobike was a limited success with perhaps only 500-600 being sold over the two-year period – the last confirmed despatch being 6 March 1962. Known frame numbers range from TB501 to TB1148.
The very last machines were sold to a farmer and known as the Sussex Miniscooter. Later still, a variant known as the Lowline Chimp appeared using a very similar frame and again a Clinton engine.
Originally, machines had black handlebar rubbers but some later models were fitted with buff-coloured rubbers. The twist grip on early machines (as appear on factory literature) was manufactured by Amal
with the cable entering parallel to the handlebars. Later bikes had the more typical Amal
twist grip with the cable entering from below.
Later models were fitted with a bashplate between the lower frame downtubes (by frame number TB879). The bashplate was dual purpose: to stop dirt entering the air filter, and also to protect the carburettor from damage. Even later models (by frame number TB1029) were fitted with a further small light steel plate shielding the carburettor float bowl and fitted under the heads of the front two engine mounting bolts.
Dimensions and weight
Performance
Frame.
The frame is manufactured from high-quality steel tube which is electrically welded to resist shock and impact. The steering head is mounted on ball bearings to provide ease and smoothness of movement. The front mudguard and the integral rear chain and mudguard are built of resin reinforced glass fibre and finished in red to contrast with the white enamel
finish of the frame assembly.
Engine.
The Clinton A490 Panther 2-stroke engine is centrally mounted to ensure perfect balance at all speeds. The engine position is adjustable to suit chain tension. The starting is by recoil starter, power being delivered to the rear wheel through an automatic centrifugal clutch
which comes into effect upon opening of the throttle
.
Models.
Two models – the Garden Model and Road Model – are basically similar, with the difference that the Garden Model does not include number plates, front wheel brake and brake lever, hooter or tax disc. Trobikes have an eye-catching colour scheme – white frames, forks, handlebars, and wheels – yellow engines – red chain/mudguards. A foam rubber
saddle
covered with black plastic leather cloth is fitted to each machine.
Wheels.
Wheels are made from extremely strong pressed steel and are of the split rim type for easy tyre removal. Both front and rear wheels run on opposed high-grade taper roller bearings on an alloy steel spindle, which is designed for easy wheel removal. Highly efficient car type internal expanding brakes
are used.
Great Britain
Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...
automobile
Automobile
An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...
manufacturer. Cars with the Trojan marque were made from 1914 and 1974.
Early history
The company was founded by Leslie Hayward Hounsfield (1877–1957) who went into business as a general engineer in a small workshop called the Polygon Engineering Works in ClaphamClapham
Clapham is a district in south London, England, within the London Borough of Lambeth.Clapham covers the postcodes of SW4 and parts of SW9, SW8 and SW12. Clapham Common is shared with the London Borough of Wandsworth, although Lambeth has responsibility for running the common as a whole. According...
, South London. He got the idea to make a simple, economical car that would be easy to drive and started design work in 1910.
In 1913 the prototype was ready. It had a two-stroke engine with four cylinders arranged in pairs, and each pair shared a common combustion chamber
Combustion chamber
A combustion chamber is the part of an engine in which fuel is burned.-Internal combustion engine:The hot gases produced by the combustion occupy a far greater volume than the original fuel, thus creating an increase in pressure within the limited volume of the chamber...
- a doubled-up version of what would later be called the "split-single
Split-single
The split-single , is a variant on the two-stroke engine with two cylinders sharing a single combustion chamber.There have been "single" and "twin" The split-single (Doppelkolbenmotor to its German and Austrian manufacturers), is a variant on the two-stroke engine with two cylinders sharing a...
" engine. The pistons in each pair drove the crankshaft
Crankshaft
The crankshaft, sometimes casually abbreviated to crank, is the part of an engine which translates reciprocating linear piston motion into rotation...
together as they were coupled to it by a V-shaped connecting rod
Connecting rod
In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts linear motion into rotating motion....
. For this arrangement to work, it is necessary for the connecting rod
Connecting rod
In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts linear motion into rotating motion....
to flex slightly, which goes completely against normal practice. The claim was that each engine had only seven moving parts, four piston
Piston
A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from...
s, two connecting rod
Connecting rod
In a reciprocating piston engine, the connecting rod or conrod connects the piston to the crank or crankshaft. Together with the crank, they form a simple mechanism that converts linear motion into rotating motion....
s and a crankshaft. This was connected to a two-speed epicyclic gearbox, to simplify gear changing, and a chain to the rear wheels. Solid tyres were used, even though these were antiquated for car use, to prevent punctures and very long springs used to give some comfort.
Before production could start war broke out and from 1914 to 1918, Trojan Ltd, as the company had become in 1914, made production tools and gauges. In 1920 the first series of six cars were made from a works in Croydon
Croydon
Croydon is a town in South London, England, located within the London Borough of Croydon to which it gives its name. It is situated south of Charing Cross...
and the final production version was shown at the 1922 London Motor Show
British International Motor Show
The British International Motor Show is an automobile show held biennially in the United Kingdom. It is recognised as an international show by the Organisation Internationale des Constructeurs d'Automobiles. The 2008 was the last event with no news of a return of the British International Motor Show...
. An agreement was reached with Leyland Motors to produce the cars at their Kingston upon Thames
Kingston upon Thames
Kingston upon Thames is the principal settlement of the Royal Borough of Kingston upon Thames in southwest London. It was the ancient market town where Saxon kings were crowned and is now a suburb situated south west of Charing Cross. It is one of the major metropolitan centres identified in the...
factory where work on reconditioning ex RAF wartime trucks was running down. This arrangement would continue until 1928 when Leyland wanted factory space for truck production. During the nearly seven years of the agreement 11,000 cars and 6700 vans were made.
Trojan Utility Car
The car known as the Trojan Utility Car went onto the market at £230, reducing to £125 in 1925, the same as a Model T Ford. Nothing was conventional. Rather than a chassisChassis
A chassis consists of an internal framework that supports a man-made object. It is analogous to an animal's skeleton. An example of a chassis is the underpart of a motor vehicle, consisting of the frame with the wheels and machinery.- Vehicles :In the case of vehicles, the term chassis means the...
the car had a punt
Punt (boat)
A punt is a flat-bottomed boat with a square-cut bow, designed for use in small rivers or other shallow water. Punting refers to boating in a punt. The punter generally propels the punt by pushing against the river bed with a pole...
shaped tray which housed the engine and transmission below the seats. The transmission used a chain to drive the solid tyre shod wheels. The 1527-cc engine to the ingenious Hounsfield design was started by pulling a lever on the right of the driver. To prove how economical the car was to run, the company ran the slogan "Can you afford to walk?" and calculated that over 200 miles (321.9 km) it would cost more in shoes and socks than to cover the distance by Trojan car.
A modified car was released in 1920 with a smaller 1488-cc engine to bring it into the sub 1.5 litre class and with pneumatic tyres available as an option. The car was guaranteed for 5,000 miles. A major contract was agreed with Brooke Bond
Brooke Bond
Brooke Bond is a brand-name of tea owned by Unilever, formerly an independent manufacturer in the United Kingdom, known for its PG Tips brand and its Brooke Bond tea cards.- History :...
tea for delivery vans making the car familiar all over Britain and with a top speed of 38 mph (60 km/h), not causing too much worry over speeding drivers.
The RE Trojan and the 1930s
With the ending of the Leyland partnership, Leslie Hounsfield took over production himself back in Croydon but at new premises with Leyland continuing to supply some parts until the early 1930s. In spite of new body styles, sales of the cars were falling and so a new model, the RE, or Rear Engine capable of 45 mph (70 km/h) was announced in 1931. It still did without electric starterAutomobile self starter
A starter motor is an electric motor for rotating an internal-combustion engine so as to initiate the engine's operation under its own power.- History :...
and had only rear wheel braking and was beginning to look very old fashioned and although new modern bodies were fitted only about 250 were sold. A final attempt was the Wayfarer of 1934 with the engine back in the middle but now with three speed gearbox and shaft drive but only three were sold and the 6 cylinder Mastra did no better with only two produced. The original van continued to sell well however and the Utility car could still be ordered, the last one was delivered in 1937.
Leslie Hounsfield had left the company in 1930 to set up a new enterprise making amongst other things the "Safari" camp bed which would be made in thousands during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
.
Trojan Ltd continued to make vans until war broke out and during hostilities made bomb racks and parachute containers. With peace, van production restarted still with the original engine until 1952 when it was replaced by a Perkins diesel.
Bubble and sports cars
Heinkel Kabine
The Heinkel Kabine was a microcar designed by Heinkel Flugzeugwerke and built by them from 1956 to 1958. Production was transferred under licence to Dundalk Engineering Company in Ireland in 1958 but the licence was withdrawn shortly afterward due to poor quality control Production restarted in...
s selling them as the Trojan 200, the last vehicle to bear the Trojan name. The company acquired the rights to build the Elva
Elva (car manufacturer)
Elva was a sports and racing car manufacturing company based in Bexhill, then Hastings and Rye, East Sussex, United Kingdom. The company was founded in 1955 by Frank G. Nichols. The name comes from the French phrase elle va .-Racing cars:...
Courier sports car in 1962, producing 210 cars between 1962 and 1965 when production switched from road cars to the Mclaren-Elva racing car.
The company still exists, though no longer operating from the Croydon
Croydon
Croydon is a town in South London, England, located within the London Borough of Croydon to which it gives its name. It is situated south of Charing Cross...
factory which has been sold.
Trojan Trobike
Trobike was one of the early makes of mini-bike and also one of the earliest to be sold in kit form to avoid purchase tax.The Trojan Lambretta group was founded in 1959 when Lambretta Concessionaires Ltd took over Trojan Ltd, one of the oldest firms in the British motor industry. At about the time the group owned the Clinton Engine Corporation of Maquoketa, Iowa
Maquoketa, Iowa
Maquoketa is a city in Clinton and Jackson counties in the U.S. state of Iowa. Located on the Maquoketa River, it is the county seat of Jackson County....
, USA.
Chainsaw
A chainsaw is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most commonly a two-stroke engine...
s. At this time many were supplied for use in portable generator
Electrical generator
In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric charge to flow through an external electrical circuit. It is analogous to a water pump, which causes water to flow...
s, paint sprayers etc.
During the late 1950s the British public were becoming aware of the craze sweeping teenage America – karting (or go-karting). The sport arrived in Britain with US servicemen bringing outfits over and even making their own.
At first, the most popular engine was the 2.5 HP 95 cc Clinton engine – being both readily available and cheap. By 1959 Trojan began making the Trokart using this engine and sold as a kit to avoid purchase tax, it sold for only £25. By 1963 it was estimated that 250,000 engines in the US and 10,000 in Britain had been sold; all for karting.
The first printed mention of the Trobike is June 1960 and the first road test published on Thursday 22 December 1960 in Motor Cycling with Scooter Weekly. The price then quoted was £35 in kit form although two adverts in 1962 quoted £29.
By November 1961 the factory, also producing the Lambretta scooters, had also tooled up to produce the Heinkel
Heinkel
Heinkel Flugzeugwerke was a German aircraft manufacturing company founded by and named after Ernst Heinkel. It is noted for producing bomber aircraft for the Luftwaffe in World War II and for important contributions to high-speed flight.-History:...
three-wheeled bubble car
Bubble car
Bubble car is a subjective term used for some small, economical automobiles, usually produced in the 1950s and 1960s.- Varieties :The Messerschmitt KR175 and KR200, and the FMR Tg500, had aircraft-style bubble canopies, giving rise to the term bubble car to refer to all these post-war microcars...
, then known as the Trojan Cabin Cruiser. It seems that the Trobike was a limited success with perhaps only 500-600 being sold over the two-year period – the last confirmed despatch being 6 March 1962. Known frame numbers range from TB501 to TB1148.
The very last machines were sold to a farmer and known as the Sussex Miniscooter. Later still, a variant known as the Lowline Chimp appeared using a very similar frame and again a Clinton engine.
Originally, machines had black handlebar rubbers but some later models were fitted with buff-coloured rubbers. The twist grip on early machines (as appear on factory literature) was manufactured by Amal
Amal (motorcycle)
AMAL is a British carburettor trademark. AMAL were the suppliers of carburettors to the British motorcycle industry and their products were present on the products of the largest British motorcycle manufacturers such as BSA and AMC...
with the cable entering parallel to the handlebars. Later bikes had the more typical Amal
Amal (motorcycle)
AMAL is a British carburettor trademark. AMAL were the suppliers of carburettors to the British motorcycle industry and their products were present on the products of the largest British motorcycle manufacturers such as BSA and AMC...
twist grip with the cable entering from below.
Later models were fitted with a bashplate between the lower frame downtubes (by frame number TB879). The bashplate was dual purpose: to stop dirt entering the air filter, and also to protect the carburettor from damage. Even later models (by frame number TB1029) were fitted with a further small light steel plate shielding the carburettor float bowl and fitted under the heads of the front two engine mounting bolts.
Specification
- Manufacturer: Trojan Ltd, Purley Way, CroydonCroydonCroydon is a town in South London, England, located within the London Borough of Croydon to which it gives its name. It is situated south of Charing Cross...
, SurreySurreySurrey is a county in the South East of England and is one of the Home Counties. The county borders Greater London, Kent, East Sussex, West Sussex, Hampshire and Berkshire. The historic county town is Guildford. Surrey County Council sits at Kingston upon Thames, although this has been part of... - Model: Trobike
- Wheels: Trojan pressed steel 5 inches (127 mm) split rim with tapered roller bearings
- Tyres: Front 3.00 x 5 DunlopDunlop RubberDunlop Rubber was a company based in the United Kingdom which manufactured tyres and other rubber products for most of the 20th century. It was acquired by BTR plc in 1985. Since then, ownership of the Dunlop trade-names has been fragmented.-Early history:...
, Rear 3.50 x 5 DunlopDunlop RubberDunlop Rubber was a company based in the United Kingdom which manufactured tyres and other rubber products for most of the 20th century. It was acquired by BTR plc in 1985. Since then, ownership of the Dunlop trade-names has been fragmented.-Early history:... - Tyre pressures: 20 pounds per square inchPounds per square inchThe pound per square inch or, more accurately, pound-force per square inch is a unit of pressure or of stress based on avoirdupois units...
- Accelerator and Brake linkage: Enclosed cable
- Brakes: two 5 inches (127 mm) drumsDrum brakeA drum brake is a brake in which the friction is caused by a set of shoes or pads that press against a rotating drum-shaped part called a brake drum....
- Chassis: ⅞ inch tubular steel, duplex
- Colour: White frame, red mudguards, black seat, yellow engine
- ChainRoller chainRoller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire and tube drawing machines, printing presses, cars, motorcycles, and simple machines like...
: ⅜ inch pitch x 7/32 inch wide. 105 links - Engine sprocketSprocketA sprocket or sprocket-wheel is a profiled wheel with teeth, cogs, or even sprockets that mesh with a chain, track or other perforated or indented material. The name 'sprocket' applies generally to any wheel upon which are radial projections that engage a chain passing over it...
: 12 tooth - Rear sprocketSprocketA sprocket or sprocket-wheel is a profiled wheel with teeth, cogs, or even sprockets that mesh with a chain, track or other perforated or indented material. The name 'sprocket' applies generally to any wheel upon which are radial projections that engage a chain passing over it...
: 64 tooth - Starter: Recoil
- Cut-out switch: Push button
- Engine: Clinton A490 Panther 2-stroke (de-governedCentrifugal governorA centrifugal governor is a specific type of governor that controls the speed of an engine by regulating the amount of fuel admitted, so as to maintain a near constant speed whatever the load or fuel supply conditions...
for Trobike application) - Lubrication: Petroil, 16:1 ratio
- Cylinder size: Bore 2⅛ inch (54 mm), StrokeStroke (engines)Reciprocating motion, used in reciprocating engines and other mechanisms, is back-and-forth motion. Each cycle of reciprocation consists of two opposite motions: there is a motion in one direction, and then a motion back in the opposite direction. Each of these is called a stroke...
1⅝ inch (41 mm) - Capacity: 95 ccCubic centimetreA cubic centimetre is a commonly used unit of volume extending the derived SI-unit cubic metre, and corresponds to the volume of a cube measuring 1 cm × 1 cm × 1 cm...
- Fuel tank: All-welded ⅜ gall tank mounted on engine
- Transmission: Single speed via Clinton centrifugal clutchCentrifugal clutchA centrifugal clutch is a clutch that uses centrifugal force to connect two concentric shafts, with the driving shaft nested inside the driven shaft....
- Electrical: FlywheelFlywheelA flywheel is a rotating mechanical device that is used to store rotational energy. Flywheels have a significant moment of inertia, and thus resist changes in rotational speed. The amount of energy stored in a flywheel is proportional to the square of its rotational speed...
magnetoMagneto (electrical)A magneto is an electrical generator that uses permanent magnets to produce alternating current.Magnetos adapted to produce pulses of high voltage are used in the ignition systems of some gasoline-powered internal combustion engines to provide power to the spark plugs... - SuspensionSuspension (motorcycle)A motorcycle's suspension serves a dual purpose: contributing to the vehicle's handling and braking, and providing safety and comfort by keeping the vehicle's passengers comfortably isolated from road noise, bumps and vibrations....
: None
Dimensions and weight
- Overall length: 48 in (1,219 mm)
- Width over handlebarsMotorcycle handlebarMotorcycle handlebar refers to the steering mechanism for motorcycles. Handlebars often support part of the rider's weight, and provide a mounting place for controls such as brake, throttle, clutch, horn, light switch, and rear view mirrors....
: 21 in (533 mm) - WheelbaseWheelbaseIn both road and rail vehicles, the wheelbase is the distance between the centers of the front and rear wheels.- Road :In automobiles, the wheelbase is the horizontal distance between the center of the front wheel and the center of the rear wheel...
: 37 in (940 mm) - Height over top of handlebarsMotorcycle handlebarMotorcycle handlebar refers to the steering mechanism for motorcycles. Handlebars often support part of the rider's weight, and provide a mounting place for controls such as brake, throttle, clutch, horn, light switch, and rear view mirrors....
: 28.5 in (724 mm) - Seat height: 23 in (584 mm)
- Weight: 60 lb (27.2 kg)
Performance
- Power: 2.5 b.h.p. at 3800 R.P.M.
- Max speed: 32 mi/h
- 0-30 mph: 21 seconds
- Braking distance: 28 ft (8.5 m) @ 30 mi/h
Frame.
The frame is manufactured from high-quality steel tube which is electrically welded to resist shock and impact. The steering head is mounted on ball bearings to provide ease and smoothness of movement. The front mudguard and the integral rear chain and mudguard are built of resin reinforced glass fibre and finished in red to contrast with the white enamel
Enamel paint
Enamel paint is paint that air dries to a hard, usually glossy, finish, used for coating surfaces that are outdoors or otherwise subject to hard wear or variations in temperature; it should not be confused with decorated objects in "painted enamel", where vitreous enamel is applied with brushes and...
finish of the frame assembly.
Engine.
The Clinton A490 Panther 2-stroke engine is centrally mounted to ensure perfect balance at all speeds. The engine position is adjustable to suit chain tension. The starting is by recoil starter, power being delivered to the rear wheel through an automatic centrifugal clutch
Centrifugal clutch
A centrifugal clutch is a clutch that uses centrifugal force to connect two concentric shafts, with the driving shaft nested inside the driven shaft....
which comes into effect upon opening of the throttle
Throttle
A throttle is the mechanism by which the flow of a fluid is managed by constriction or obstruction. An engine's power can be increased or decreased by the restriction of inlet gases , but usually decreased. The term throttle has come to refer, informally and incorrectly, to any mechanism by which...
.
Models.
Two models – the Garden Model and Road Model – are basically similar, with the difference that the Garden Model does not include number plates, front wheel brake and brake lever, hooter or tax disc. Trobikes have an eye-catching colour scheme – white frames, forks, handlebars, and wheels – yellow engines – red chain/mudguards. A foam rubber
Foam rubber
Foam rubber refers to rubber that has been manufactured with a foaming agent to create an air-filled matrix structure. Commercial foam rubbers are generally either polyurethane foam or natural foam rubber latex. Latex foam rubber, used in mattresses, is well-known for its endurance.-See also:*...
saddle
Motorcycle saddle
A motorcycle saddle is a term for a motorcycle seat in some parts of the world. It is a seat for carrying a rider and, possibly, a passenger, and which is attached to a motorcycle often but not exclusively, behind the fuel tank....
covered with black plastic leather cloth is fitted to each machine.
Wheels.
Wheels are made from extremely strong pressed steel and are of the split rim type for easy tyre removal. Both front and rear wheels run on opposed high-grade taper roller bearings on an alloy steel spindle, which is designed for easy wheel removal. Highly efficient car type internal expanding brakes
Drum brake
A drum brake is a brake in which the friction is caused by a set of shoes or pads that press against a rotating drum-shaped part called a brake drum....
are used.