Contact: Herb Crosby (207) 581-2134; Tom Weber (207) 581-3777ORONO — Trying to navigate wheelchairs over rough, hilly terrain can be a risky business, as their more outdoorsy users can tell you. A chair can roll backwards should your hands come off the wheels even for an instant, and tipping over on an incline is always read more UMaine Students to Test Wheelchair Devices at Senior Design Competition