Israel Urieli (Dr. Iz) Mech eng, bicycle designer
Some of you might be interested in his bicycle projects. Looking for a college, maybe this guy can help you get an ME degree while indulging your interest in bikes. He seems to have an interest in belt drives.
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.