UniveristyOfPennsylvania
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Alpha Bike concept: free-wheeling fixie for flip-floppers
So Philliebot was a fail, but this chainless bicycle serves as proof that UPenn doesn't always come up short. The Alpha Bike, designed by a group of engineering students, contains an entirely internal drivetrain that allows riders to switch between fixed-gear and multi-gear setups. The simple switch is enabled by an electronically controlled clutch, part of the Switchable Integrated Free-Fixed Transmission (SWIFT), discreetly hidden in the bike's frame. Populating the front hub are a drum brake and a dynamo, which juices the bike's electronics -- the back hub contains a three-speed gear set, put in motion by a simple push-pull cable. When the front wheel starts rolling, an LED screen mounted in the carbon fiber handlebars is illuminated, displaying time, cadence, and speed, among other things -- this data and more is stored on an accessible SD card. As of now, the bike is still a prototype, but if you start saving now, you might actually have enough scratch to buy one when it comes to fruition.
Researchers develop backpack to ease heavy loads
Those crack backpack researchers at the University of Pennsylvania are at it again, New Scientist reports, following up their power-generating backpack with one designed simply to lighten the load on the wearer, apparently re-purposing some of the same technology from their earlier model. As with that backpack, the person wears a metal frame with the cargo suspend from it, in this case using elastic cords instead of springs. But instead of generating power from the resulting bouncing motion, the backpack simply takes advantage of the natural action to keep the load at a constant height as the person walks, supposedly reducing the energy required to carry a heavy load by up to 40%. Unlike wth the power-generating backpack, however (which was developed at the behest of the US Office of Naval Research) Larry Rome, the creator of this new bouncy backpack, looks to be thinking commercially from the get go, founding the "Lighting Packs" company with the full intention of taking 'em to market.[Via Digg]
