As you can see, the fitment looks very good on the car. The wheels and tires fill out the wheel wells satisfyingly, though don’t rub in any way. Since the tires are summer fitment, we are running them only in warmer weather. Before the seasons turned, we were able to log some miles and found that the greater weight and larger contact patch with summer compound tires did take a toll on range. We’ve seen that come in at about 185-190 miles for a full charge in fall temperatures.
The arm may be broadened into a V shape with two pivots, either side by side or with the inner pivot slightly behind the front one - a semi-trailing arm. Trailing arms are usually found at the rear only. A trailing-arm suspension on a rear-wheel-drive car. The arm is attached to the rear wheel hub and broadens into a V whose two arms extend forward to pivot on the frame. The differential is fixed to the frame and the drive shafts have universal joints.
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The LBR Review Team is back with Peter Stull doing a review of the Greenspeed Magnum BW and Larry Varney evaluating the Steintrike Wild One.
Drive Medical Blue Streak Ultra-Lightweight Wheelchair With Flip-Backs Arms & Swing-Away Footrests
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Both modeling and experimental results demonstrate several realistic scenarios in which wheel hubs experience accelerations greater than 100g, sometimes at very low vehicle speeds. This paper focuses on the experimental determination of suitable design goals for in-hub motors (wheel motors), describing the experimental test rig, experiment procedures, and experimental results from testing conducted at UT-CEM. The paper also discusses implications of these results on wheel motor design, leading to the conclusion that a realizable and feasible design goal for a combat vehicle wheel motor shock rating is 150 g's, with a 10 to 20 ms pulse width.
4: Up hill- this is where i think you may encounter difficulty. since its a climb. assume that you follow case 1, then you should be at least fine here. you have to focus on the ground distance to hub must always be greater than radius of wheel parallel to inclination of climb. (because imagine case 1, if your hub is no longer at the center, you will be lifting your self. in an inclined position. more difficult than lifting in a plane.
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“Selective suspension is the key to the mechanism because constant suspension creates loss of energy, making pushing more strenuous. Only when encountering an object does the suspension system activate, making the inside of the wheel, the hub, move and absorb most of the shock instead of the wheelchair user’s body,” she said.
A trailing arm is attached to the wheel hub at one end, and extends forward to a pivot on the frame.
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Liked what you read? Check out more articles on accessibility and technology on bespoken! Share Tweet Facebook Replies to This Discussion Permalink Reply by Rory Telfer on March 24, 2015 at 14:38
@ Bob Stuart: The built-in air cylinders avoid the bouncing. The very first design in 2010 was actually with springs and, indeed too bouncy. The cylinders have a non linear suspension (exponential) that have a great dampening effect.
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The design most likely requires a drum or disc brake since the rim’s position would likely change too much for rim brakes. We’re thinking this could be a fun design for commuter and city bikes where aerodynamics and weight are slightly trumped by comfort, particularly where the streets are a bit rough. More info as it comes online, and another pic after the break… Androo on April 14th, 2013 - 1:57pm
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Great comments and I would like to explain the questions raised, because it is a huge innovation. Wheelchair: Nothing is rigged about it. Two of the cheapest identical Invacare wheelchairs were bought and one was modified with the Air Suspension Wheel technology. Zoltan (the inventor) has never been in a wheelchair before and therefore it may seem a bit clumsy, but definitely nothing was done intentionally. Here is the video of how it works in gravel: https://www.youtube.com/watch?v=A429IzLKbWM&t=2s.