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Driving upside down through a tunnel is only a matter of down force combined with g-forces created during the loop, verse gravity. The total pressure of down force when combined with the g-forces created by effectively circling the perimeter of the tunnel must exceed the total weight of the vehicle and driver. If this level of pressure can be reached, a vehicle can in theory drive upside down through a tunnel.
Driving upside down through a tunnel is only a matter of down force combined with g-forces created during the loop, verse gravity. The total pressure of down force when combined with the g-forces created by effectively circling the perimeter of the tunnel must exceed the total weight of the vehicle and driver. If this level of pressure can be reached, a vehicle can in theory drive upside down through a tunnel.
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