A three-wheeled vehicle having a front body member carrying front wheel seat, hand pedals and leg supports pivotally connected to a rear body member carrying the rear wheels and the handlebar. The front body member includes an operator seat and pedals for actuation by the pilot's hands. The seat, pedals, front wheel and leg supports are held in a fixed relationship so that the pivoting of the front frame part simultaneously pivots the seat, pedals, drive line and front wheel to Maintain said fixed ratio while rotating and supplying power to the front wheel. A stabiliser damper between the front and rear frame sections provides smooth steering and inhibits inadvertent unwanted movement from side to side of the cyclist's body and thus the vehicle's repetitive turning back and forth.
In this experimental study of a prototype wheelchair with lever propulsion, we examined the effect of a number of mechanical advantages (MA) on physical stress, oxygen absorption, energy cost, mechanical efficiency, Movement and perceived effort. Nine out of 10 male wheelchair users successfully performed five sub-maximal tests on a motorised treadmill on an asynchronous bi-manual prototype tricycle. Each test contained the same protocol, but made use of one of the five different MAs. In each test the tilt level increased by 1% every third minute, starting at 0% up to 3%. The velocity was constant at 0.97 m. Measured variables included oxygen uptake, minute ventilation, respiratory exchange rate, heart rate, and stroke frequency. The analysis of repeated measurements was made on the main factors of slope and MA and their interaction. Additional analysis includes multiple regression analysis.