Mike Shaw wrote: SNIP > >To reduce the steepness of the incline, the road tunnel curves around quite >a lot. >I noticed that, once you have the steering wheel on the correct "lock", you >don't have to move it again, so the tunnel curve must be the arc of a >circle. >But the centre of the circle must be out there somewhere under all that >rock. > >So, my question is:- How do you draw a circle (or part thereof), when you >can't get to the centre?
So it's not just a plane circle, it's a Helix to add to the complications. The first and last quarters of the Tune Tunnel turn through 360° (ish) while descending/climbing quite steeply and were cut from both ends simultaneously to meet in the middle. Of course we are not told if one of their mistakes perhaps ended up in Denmark! ;-) Mmmmh...perhaps THAT's where all the current flood of illegal immigrants is coming from! Tony Moss P.S. No offence intended to Danish List members - we often holidayed there!
