https://www.openlearning.com/u..../saunderscallahan-sm
Self Propelled Wheelchair With Attendant Brakes Self-propelled wheelchairs with attendant brakes are an ideal choice for those who require extra stability and support when traveling. They come with rear-drive wheels, as well as a variety of accessories that can be added, such as flip-up leg rests that swing away or flip-down armrests. There has been very little biomechanical studies on the turning and maneuvering of attendant propelled chairs. This is an