Hello everyone, first post on this forum and I'm really excited to hear you feed back. For my first year engineering design course I'm asked to design a vehicle that will undergo a hairpin turn (180 degrees) around a 2 by 4 piece of wood. The vehicle must only harness the power of elastics or balloons to undergo this turn (also that energy can be converted to other forms). It will travel for around 5-7 feet before undergoing the turn and then continue to move for another 5-7 feet (the track is pretty much a table split by a big piece of wood in the middle). As well, the vehicle must cost less that 20 dollars (final prototype). The attempt at a solution I've already come up with several good ideas with regards to powering the vehicle as well as the hairpin turn such as shifting the centre of gravity of the car to cause it to loop around the track (projectile motion). However I would really like to hear some other ideas. PS Don't be afraid to mention anything no matter how absurd, it's all part of brainstorming ;).