sidecar of bicycle

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This sidecar was built to transport my 3 year old son on the local cycle paths. It was constructed from a steel angle frame, with a wooden bodywork and plastic screen. It was designed to pivot against the bicycle frame so the cornering and riding were less affected by the addition of the car. The design was reminiscent of sidecars which were commercially available in the 1940's. Sidecar From Wikipedia, the free encyclopedia

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Page 1: Sidecar of Bicycle

This sidecar was built to transport my 3 year old son on the local cycle paths.

It was constructed from a steel angle frame, with a wooden bodywork and plastic screen.It was designed to pivot against the bicycle frame so the cornering and riding were less affected by the addition of the car.The design was reminiscent of sidecars which were commercially available in the 1940's.

SidecarFrom Wikipedia, the free encyclopedia

Page 2: Sidecar of Bicycle

Motorcycle with sidecar, Philippines

Bicycle with sidecar

For other uses, see Sidecar (disambiguation).

A sidecar is a one-wheeled device attached to the side of a motorcycle, scooter, or bicycle,[1] producing a

three-wheeled vehicle.

Contents

 [hide]

1 History

2 Design

3 History

4 Manufacturers

5 Sport

6 Regulation

7 Bicycle sidecars

8 Gallery

9 See also

10 References

History

A sidecar appeared in a cartoon by George Moore in the January 7, 1903, issue of the British newspaper Motor

Cycling. Three weeks later, a provisional patent was granted to Mr. W. J. Graham of Graham Brothers, Enfield,

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Middlesex. He partnered with Jonathan A. Kahn to begin production. A motorcycle with a sidecar is sometimes

called a combination, an outfit, a rig or a hack.

Design

A sidecar motorcycle is a three-wheeled vehicle with the side wheel not directly aligned with the rear

motorcycle wheel, and is usually powered by the rear wheel only. This is different from a motor tricycle (trike),

where both rear wheels are powered and share a common axle. However, either P.V. Mokharov of the Soviet

Union or H.P. Baughn of Great Britain seem to have to been the first to employ a driven sidecar wheel in 1929.

Baughn two-wheel-drive outfits were so successful in trials events in the early 1930s that there were attempts

to have the ACU ban them from competition. A great many companies experimented with two-wheel drive in

sporting events and indeed many companies employed them in military vehicles prior to the commencement of

WWII. Currently, the Russian manufacturer Ural produces several models with two-wheel drive that can be

engaged as desired.

The sidecar consists of a frame (which originally was rigidly fixed to the motorcycle's frame on one side and is

supported by the sidecar's wheel on the other side) and of a body. The body typically provides one passenger

seat and a small trunk compartment behind. In some case the sidecar has a removable soft top. In some

modifications the sidecar's body is used for carrying cargo or tools, like a truck's platform). The sidecar is

typically mounted so that the motorcycle is closer to the center of the road, i.e. with the sidecar on the right for

right-hand traffic.

Sidecar on Vespa scooter

In 1913, American inventor Hugo Young, of Loudonville, Ohio, designed a new sidecar which was not rigidly

fixed to the motorcycle. Instead, his invention employed a flexible connection, which allowed the sidecar to turn,

raise, and lower without affecting the balance of the motorcycle. This was a great improvement over the original

design, allowing for much safer and more comfortable experiences for both the passenger and driver. Young

opened up the Flxible Sidecar Company (the first "e" was dropped to allow for trademarking the name) in

Loudonville, Ohio and soon became the largest sidecar manufacturer in the world. When the motorcycle craze

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began to fade in the 1920s due to more affordable cars being marketed, as well as the banishment of sidecar

racing in the United States, the Flxible Sidecar Company began producing transit buses, ambulances, and

hearses.

A sidecar makes the handling of a bike asymmetrical. Without a brake on the non-driven sidecar wheel, the

sidecar will pull towards the bike under braking, and towards the sidecar under acceleration. While a sidecar

pilot is described as driving rather than riding, with all but the heaviest rigs, the comparison to a car is weak.

Driver and passenger body position affect higher speed handling, especially on dirt or other uneven surfaces. If

the sidecar and bike geometry are not coordinated the combination will be unstable, especially at speed,

with shimmy upon acceleration or deceleration, becoming a dangerous problem.

The motorcycle's steering geometry, originally set up for a tilting single track vehicle, is set up to turn slightly

away from the drag imposed by the sidecar. Leaning the motorcycle by clamping it rigidly a few degrees

opposite the sidecar is used, along with a few degrees of "toe-in" of the sidecar wheel toward the centerline of

the vehicle, is used to provide a balance resulting in comfortable, straight line travel. Most sidecars are also

fitted with steering damping devices, of either friction or hydraulic type, to lessen the effects of sudden inputs,

as encountered on rough roads, upon the vehicle's handling.]],[2]

Steib sidecar on 1954 BMW R68

An eRanger motorcycle ambulance in southern Sudan

History

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Sidecars have been manufactured since early in the twentieth century. Until the 1950s sidecars were quite

popular, providing a cheap alternative to passenger cars; they have also been used by armed

forces, police and the UK's AA and RAC motoring organisations. DuringWWII, German troops used

many BMW and Zündapp sidecar motorcycles. On German, French, Belgian, British and Soviet military

sidecars, the side wheel was sometimes also driven, sometimes using a differential gear, to improve the

vehicle's all-terrain ability.

One of Britain's oldest sidecar manufacturers, Watsonian, was founded in 1912. It is still trading as Watsonian

Squire. Automobile producerJaguar Cars was founded in 1922 as a sidecar manufacturer, the Swallow Sidecar

Company.

Manufacturers

Although sidecars have become much less common since the mid 1950s, a number of manufacturers

worldwide have continued to produce sidecars for many popular motorcycles and scooters. Active sidecar

manufacturing companies include:

Hongdu and Zhuzhou in China

Watsonian Squire in England

Cozy in India

IMZ-Ural and VMZ for Izh in Russia[3]

Harley-Davidson in the USA

Highway Sidecars (HRD, DJP and Higgins) and Premier in Australia

Louis Christen Racing in Switzerland

GG Duetto in Switzerland

Engbers Zijspan Service B.V. in Netherlands

The Ranger Production Company (making eRanger motorcycle ambulances) in England and South Africa

Wasp Motorcycles in England[4]

Racing sidecars at the Isle of Man TT

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Sport

See also: Motorcycle sport

Sidecar racing events exist in Motocross (see Sidecarcross), Enduro, Grasstrack, Trial, road

racing and Speedway with sidecar classes. The sport has followers in Europe, United States, Japan, Australia

and New Zealand. The sidecars are often classed by age or engine size, with historic sidecar racing often

being more popular than its modern counterpart. Older classes in road racing generally resemble solo

motorcycles with a platform attached, where modern racing sidecars are low and long and borrow much

technology from open wheel race cars. In all types of sidecar racing there is a rider and a passenger who work

in unison to make the machine perform, as they would be almost unrideable without the passenger in the

correct position.

Road racing sidecars began to change away from normal motorcycle development in the 1950s with them

becoming lower and using smaller diameter wheels and they kept the enclosed "dustbin fairing" banned in solo

competition in 1957. By the 1970s they were using wide slick tyres with a square car like profile, the rider

kneeled behind the engine instead of sitting on a seat and the motor of choice was generally a 500 cc two

stroke. In the late 1970s sidecars began to appear with hub centre steering and later the engines moved to the

rear of the rider, to lower the centre of gravity further still, making the sidecar very long. Sidecars raced in the

world championship known as Superside are all hub centre long monocoque framed machines, the most

common being LCR, ART or Windle, with 1,000 cc four-cylinder four-stroke engines, the most popular being

the Suzuki GSX-R1000.

These at club and national level are known as Formula One sidecars, as opposed to Formula Two. Formula

Two sidecars are short front engined bikes, which must have a frame made of steel tube and have leading link

forks as monocoques and hub centre steering is banned. Engines are 350 cc two strokes or 600 cc four

strokes. F2 sidecars are raced in their own championship but are often on track at the same time as the F1s,

but competing for their own points. Since 1987 at the Isle of Man TT, the Sidecar TT has been solely contested

by Formula Two sidecars as Formula Ones were deemed too fast, then lapping at 108 mph (174 km/h)

average. By 2006 however, F2s were faster than this lapping at 116 mph (187 km/h).

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German bicycle sidecar, 1931

Regulation

Sidecars are normally fitted on the near-side of motorcycles so that the rider is on the off-side, just as car-

drivers are seated. In Australia and the UK. imported continental or US right-hand sidecars would be on the off-

side, and are prohibited.

In Taiwan, Article 39-2 of the Road Traffic Security Rules (zh:道路交通安全規則) prohibits the registration of

new motorcycles with sidecars but does not specifically restrict fitting them later.

Bicycle sidecars

Sidecars have sometimes been fitted on bicycles. The "Watsonian" brand was popular from the 1930s to the

1950s in the UK. There remains the problem of applying side-thrust to light-weight components only intended

and built to resist radial forces.[citation needed] However, the Philippines pedicabis usually of that configuration.

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Bicycle Sidecar Build

For details of the sidecar design please see the previous page.

The CAD sketch on the right shows the proposed wheel and frame design.

 

Frame Plan

First the angle iron was cut to the required lengths and all the ends were squared off.

Areas to be welded were cleaned with a grinder and then the frame was assembled on a flat surface with some wooden right-angles to set things square. Cable ties were used to hold everything in place.

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This image shows the frame after welding.

Click for larger image

This image shows the basic frame completed.

The wheel support had a slot to enable the sidecar to be height adjusted for different bicycles.

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The outer wheel frame was a piece of bent 25mm strip steel (4mm thick). The bends had to be made fairly accurately to ensure the wheel would be a good fit between the mounts. This outer frame was bolted to the main frame rather than being welded, to make the wheel removable.

The outer wheel support was located on the axle and the clamped to the outer frame, ready for welding.

This photo shows the outer wheel support welded in place and everything assembled so far.

Click to enlarge

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The sidecar bodywork was made with a 12mm plywood base and top. The sloping back was also 12mm ply and a hole was cut to allow access to the boot.

Softwood stand-offs were used to set the height and then a 4mm plywood skin was glued and tacked in place.

Bodywork with one outer skin in place.

Some waxed string was laced though the ply skin panels at the front to pull the two halves together. Screws were added to hold the top and bottom corners in place.

A section of the top panel was cut out and the sides were shaped, to form the passenger compartment.

A plywood piece was glued to each side to give the cut edge some strength and a grab handle was added at the front.

The 2 images below the bodywork resting on the wheel frame tp give a feel for the final set up.

Basic bodywork box

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This photo shows more progress.

A dimension check with the young passenger showed that the hole in the top was a bit tight.

So the windscreen was moved 40mm further forward and the back of the compartment was moved back as much as possible.

This photo also shows the wheel arch, which was made from 2 semicircles of 12mm ply with a 4mm thick curved top. This assembly was only secured to the inner frame so that the wheel could still be removed by unscrewing the outer frame.

Body filler was used to blend the wood joints. The front seam was covered in a thin fibreglass layer and also smoothed in with body filler.

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The boot lid was cut to shape and secured with 2 flush hinges.

The bodywork was painted in an army type colour. Actual NATO Paint was expensive (and toxic) so some domestic wood paint was mixed at the local hardware store to get a karky type colour.

Click to Enlarge

Click to Enlarge Click to Enlarge

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The sidecar bodywork was attached to the frame using some springs at the rear and some rubber stand-offs at the front to act as a pivot.

Since writing this page I have received a number of questions about the pivot, how it is designed and how it is fixed to the vehicles. Hopefully the photographs below will help.

Two clamps of bicycle pivot Detail of sidecar pivot. The block with 2 mounting bolts had slotted holes to allow

the tracking to be set,

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Assembled link from the front Assembled link from the rear.

This photographs show the bicycle clamp parts

Another view of the assembled pivot without the bodywork in place.

Other people who have build similar sidecars have used a piece of threaded rod for the pivot which also allows the fore and aft position of the car to be set.

http://www.steves-workshop.co.uk/vehicles/sidecar/sidecarbuild/sidecarbuild.htm

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