Wheelchairs Research Paper

Improved Essays
Power wheelchairs have two main modules: the base (formed by the batteries, the controller, the wheels and the motors) and the seating system. The wheels configuration will have a direct effect on the wheelchair’s performance in different situations. As we have two types of wheels (drive wheels and castors), depending on how they are positioned and how the weight is distributed, they will be more or less efficient in different situations, environments, terrains, etc. The first critical difference is the centre of rotation, which will be located at the same level the drive wheel is. At the same time, these configurations will have a direct influence on the wheelchair’s turning radius.
• In a front-wheel drive chair, both the drive wheels
…show more content…
This means that the majority of the weight will be resting on the wheelchair’s rear part.
Each base configuration has its own advantages and disadvantages, and even though any of them may have perceived advantages over the others, at the end it all depends on user’s personal preferences and they necessarily need to be taken into account. Trialling is key before deciding on any of them.
RWD
Advantages
Rear-wheel drive configuration performs well at high speeds and outdoors, and offers great overall stability, because the user’s centre of mass is positioned between the casters and the drive wheels.
Disadvantages
Rear-wheel drive configuration has the largest turning radius and wheelchair’s footprint. It can be compared to pushing a supermarket cart, where the length in front of the user needs to be taken into account when turning. RWD bases are also less stable and they may need back anti tippers, since most of the weight is located rearwards.
MWD
…show more content…
This system helps a MDW chair to drive comfortably and safely in any terrain: allows for a smooth ride reducing the impacts, helps maintaining the users’ horizontal position and avoids roll and pitch when dealing with obstacles and kerbs.
FWD
Advantages
Because of its short front end, a FWD chair deals well with tight corners, although its long back end needs to be taken into account in order to let the complete base to swing around. This wheelchair configuration is considered great at climbing obstacles, since the drive wheels are located in the front of the chair. It also has better weight distribution than the other configurations. This is because batteries are usually located at the back and they balance the weight of the drive wheels at the front. That is why FWD bases are notably stable when being driven on uneven terrains and hills.
Disadvantages
FWD chairs are not considered to function well at high speeds, and due to its long back end, it may cause the casters to fishtail (especially at top speeds). If there are two batteries and one is located at the front, a FWD wheelchair will need front anti

Related Documents

  • Improved Essays

    Guide to Buying Mobility Scooters A mobility scooter helps to extend the autonomy and independence of people with physical limitations in their day to day. This device has wheels driven with an electric motor and a comfortable seat both attached to an elegant chassis. All this makes it easy for people with reduced mobility to move from place to place. Mobility scooters incorporate a number of features so they can be adapted to different user needs. While the variety of options is good for those who need a mobility scooter, selecting the scooter can be quite a challenge.…

    • 1303 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    Wheelchair Research Paper

    • 992 Words
    • 4 Pages

    Autonomy in the area of mobility has always been highly valued, but it sometimes impaired by some form of disability. In many cases this results in reliance on some form of external transport mechanism. In this regard traditional wheelchairs and powered wheelchairs continue to play a vital role. However wheelchairs to date provide a high level of mobility only in artificial or “barrier free” environment. There remains a significant gap between the obstacle negotiating ability of a wheelchair and that of the average able bodied person.…

    • 992 Words
    • 4 Pages
    Improved Essays
  • Great Essays

    and is featured with oversized dual wheel carpet casters for easy rolling. The seat is well cushioned for a comfortable seating environment and the back is designed with breathable mess, so no matter how long your sit you’ll feel comfortable without getting to hot. Built in lumbar support conforms to your back allowing for better posture control…

    • 1012 Words
    • 4 Pages
    Great Essays
  • Improved Essays

    Counterbalanced pedals – these enable the user to get reverse or forward cycling motion. Adjustable foot straps and handles – these add to the safety and comfort during workout. Transport wheels – these wheels ensure easy relocation of the equipment. Pros and cons of Marcy Recumbent Exercise Bike with Resistance ME-709 Pros -- It is having a low price for a high quality recumbent bike. The footprint area is small as compared to other bikes which makes it more compact and easy to store.…

    • 721 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    Have a longer lever for distance. These were what I was thinking, my idea being having the big cd wheels in the back and because of how thin and their light weight they seemed as if they would work very well for not slowing it down, but of course they would have needed ballowns around them to add a little bit of traction. my idea for what the car was goig to be build as was I planned on hvaing 3 wheels, and have them on there like how you would have the wheels on a trycical, with a leaver at leastslightly larger then the block of wood. Although, even though I did my reserch the previous day I was still confused on many trhings and had and asked…

    • 1402 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    https://www.amazon.com/34-Aluminum-Wheelchair-Threshold-Ramp/dp/B008SDK66Y/ref=sr_1_2?s=hpc&ie=UTF8&qid=&th=1 The wheelchair threshold ramp by Rage Powersports This wheelchair ramp offered by Rage Powersports is well-constructed, durable and useful for creating a smooth surface over your thresholds. Users love sturdy construction, but some do note the assembly instructions need to be clearer. This threshold ramp for doorways has a size of 16.6 x 34 x 3 inches, a weight of 11 pounds, a heavy-duty and rust-resisting aluminum construction, a non-slip surface, and a maximum capacity of 600 lbs. You can adjust the height from 2.75" to 3.25", and the package also includes hardware for assembly and surface anchoring. Overall, this is a good choice…

    • 1142 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    This is a nice transition into my next point, safety of the lift. When deadlifting, there is a higher chance for injury due to improper form. There are more hinge points and variables which could result in injury. The trap bar is much safer allowing for more control and stability with the lift which in turn creates a safer lift. The final point about why the trap bar deadlift is a very good exercise is that it allows for those with less mobility to still challenge themselves with their weights.…

    • 617 Words
    • 3 Pages
    Improved Essays
  • Great Essays

    Centurion Tank Analysis

    • 1304 Words
    • 6 Pages

    Another aspect that makes a tank versatile is its ability to move around the battlefield. Because of the centurion’s weight, it did lack some maneuverability. The Centurion ran on a Meteor Mk 4 V12 petrol engine, which had a brake horse power of 650. This gave the centurion a power to weight ratio of approximately 12.7bhp/ton. The Centurion could drive up to 23.7mph on roads or 15mph cross-country as well as the…

    • 1304 Words
    • 6 Pages
    Great Essays
  • Great Essays

    Another benefit is that it can be mounted on any location on the wheelchair (“Alternative Drive Controls”, n.d.). Having a separate interface makes the joystick adaptable to a patient’s individual needs. The technology also includes a clamp that allows for easy mounting on the wheelchair. This is a lighter version compared to the standard joystick and is ideal for chin, lip or finger use. The multi joystick is Omni compatible with its SUB D9 pin connector.…

    • 1188 Words
    • 5 Pages
    Great Essays
  • Improved Essays

    16-inch air-filler tires come to rescue to avoid those bumps bringing in a smooth and speedy ride. This jeep overland jogging stroller is also secure enough as it features rear wheel foot-activated parking brake that is indeed easy to operate and locks out both rear wheels. Other features are as…

    • 869 Words
    • 4 Pages
    Improved Essays