Wednesday, 28 August 2013

Bicycle

Module 1 : Technology through history

                                                                       Bicycle

                                                               From Motat museum



A bicycle is an amazing piece of technology that has evolved over the years. It is essentially human powered contraption consisting of a metal frame and wheel(s). They are used for recreation, commuting, grocery delivering, sports etc.

 In the olden days, bicycles were large, heavy and unwieldy such as the penny farthing.  
Penny farthings had one large wheel at the front and one small wheel at the back. You can see people riding penny farthing today for novelty.



Bikes were commonly used by workers to commute in the days before extensive public transport and cars.

“Commercial” versions were used to deliver goods by butcher’s and grocer’s boys.




They are still used as a main form of transport in such places as India and China.




These days, the bicycle has adaptively radiated and diversified. They are composite fibre/alloy and they have gears for efficient pedaling i.e. High gear for more efficient pedaling uphill. They tend to be light, small, aerodynamic e.g. aerobars. Aerobars are designed so that you lean forward on the bike, making the system (bicycle + rider) more aerodynamic.




Modern day bikes these days tend to be specialised.
Road bikes are very light and have thin tyres with large diameters so that one rotation of the pedals equals one rotation of the large wheel i.e. a large distance travelled, hence they are very efficient for travelling on smooth surface such as paved and tarred roads in cities.



Mountain bikes are still light compared to antique bikes but are studier compared to road bikes. They have wide types to create friction to grip the ground and a shock absorber system, the key to effective riding over rough terrain such as dirt and mountain paths.



BMX bikes look similar to mountain bikes but unlike to mountain bikes which are designed for rough terrain, BMX are designed for performance and agility. They have smaller frames to allow the rider to better control the bike which is important when performing stunts.




Track bikes are similar to road bikes. However they are designed for maximum speed and power which is required for competitive racing and gives little to no thought to the comfort of the rider.





Rickshaws are ‘bike taxis’ that are pedalled by people to transport people. They are common in Asia.




Some bicycles are now electronic in which an electric motor that pedals for you.



A commuter taxi version common in Thailand is the tuk tuk






In New Zealand bikes are not extensively used for commuting. It is the lowest form of transport used according to the 2006 Census (Statistics New Zealand, n.d.). This is due to a combination of factors that includes the climate (wet, windy), the terrain (hilly and winding roads with poor surfaces) and the dangers (a combination of climate, terrain and other road users). Cycling paths and lanes are starting to be developed down major corridors and alongside new roading projects. The New Zealand Transport Agency is being increasingly involved (NZTA, n.d.)
Initiatives to increase the number of people using cycles to commute and to increase the awareness of cycling include the annual cycle to work day. (Auckland Transport, n.d.)











There are also cycling clubs and groups of cyclists can be seen riding together most days. There are major cycling events such as Round Taupo. Cycle touring is also popular. There is a national network of cycle ways being established. Many trails follow old railway lines as these typically have a shallow gradient. The first and most famous of these is the Otago Rail Trail (The New Zealand Cycle Trail, n.d.).




Cycle technology had improved a long way. Cycles have now been adapted and specialised for a variety of purposes including transport and recreation. While cycling is no longer the main form of transport for countries in the developed world it is having a comeback, as people realise that they need to be fitter in a world that sees them increasingly reliant of sitting behind a desk or computer in sedentary jobs. As city traffic becomes gridlocked cycle commuting offers benefits. It is also successful in ecotourism. The great NZ cycle trail is part of this initiative.






References:
Auckland Transport (n.d.) Accessed from

Statistics New Zealand (n.d.) Commuting patterns in-NZ: 1996-2006. Accessed from

NZTA (n.d.) By Bike. Accessed from http://www.nzta.govt.nz/traffic/ways/bike/         19 August 2013

The New Zealand Cycle Trail (n.d.) New Zealand’s Original Great Ride. Accessed from http://www.nzcycletrail.com/otago-central-rail-trail 21 August 2013