Tuesday, June 22, 2010
Dan Lonowski's Quadster HPV
DAN AND BRENDA LONOWSKI on their Quadster top the hill during the hill climb-coast down portion of the Urban Transportation Contest on June 12. (Mike Eliasohn photos)
Dan and Brenda Lonowski of Novi participated in the Urban Transportation Contest on their Quadster HPV, which Dan designed and built. Construction started in July 2009 and he finished in December. "I've had the idea for probably 10 years," he said.
There are two separate 21-speed (3x7) drivetrains, one for each rider. The rider on the left does the steering and braking. Both pedal independently at their own cadence.
Dan welded the frame from 1- by 1-1/2 inch 16 gauge mild steel tubing. With its long wheelbase, the frame flexes slightly to provide passive suspension. Front wheels are 20x1-3/4; rears are 700c. There's an Avid disk brake for each rear wheel.
Dan also made the rear wheel hubs. Each short rear axle is supported by two pillow bearings.
He plans to replace the seats shown with mesh seats. Position of each seat is adjustable to accomodate various sized riders.
Some dimensions: Weight, 73 lbs. (33.2kg) ; wheelbase, 68 in. (1725mm); width, 47.2 in. (1200mm); length, 92 in. (2330mm).
Dan and Brenda have undertaken 10- to 20-mile rides on the Quadster, including some on unpaved trails.
Dan says the Quadster is another aspect of human-powered vehicles -- for utility and recreation, rather than speed. He said some day there might be a market for such vehicles, starting with bicycle rentals in tourism areas and pedestrian communities.