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Off-Road Wheelchair Makes the Climb
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Amos Winter is a PhD candidate in mechanical engineering who founded the MIT Mobility Lab in 2007 so students, experts, and manufacturers could work together on tech that helps people get around. His prototype for a "Leveraged Freedom Chair" or LFC is made from inexpensive bicycle parts and intended for use in developing areas. Levers attached to a bike drivetrain enable the chair to take on bumpy, unpaved routes. Hand position on the levers controls the leverage and rotational speed.
Winter came up with the idea after spending time in Tanzania, where regular wheelchairs couldn't handle the bumpy journey and single gear tricycles powered by hand were too unwieldy for indoor use. Last month, with help from the Association for the Physically Disabled of Kenya, Winter and a team of undergrads took LFC prototypes to East Africa for testing in a variety of situations. According to MIT News, one Tanzanian tester who has a spinal injury was able to use an LFC to travel uphill without much exertion. He called it "my little angel machine."
Next, Winter will use the test results and feedback from users to make 30 new prototypes for a second trial later this year in Guatemala. Each chair originally cost a little under $200 to make using a hacksaw, welder, drill, and vice. A grant from the Inter-American Development Bank will help Winter determine the best way for them to be manufactured locally in the areas where they'll be used. This short video by Melanie Gonick shows how the LFC works, and its impressive ability to tackle tough terrain during trials in East Africa: