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[cem_devecioglu]

http://www.calctool.org/CALC/phys/newtonian/centrifugal

centrifugal acceleration must not be below 1 g..
and of course 2-3 g is more safe

Totally agree that is feasable on reply no8 that centrifugal force will make it work with enough speed carrying into the loop.

To go back to the original theory of driving upside down, requires a fair old speed and aerodynamic downforce, so fo the SLK to drive upside down I would say no, to to a quick loop I would say with enough speed it may be posibble for a quick forward tunnel loop with a lot of cars.

I think sls can also do that because when you apply the formula, basic parameters is the angular speed/speed and tunnel radius regardless of mass (mass cancels from both sides of equation only effects when you accelerate initially)

edit :
I watched it again, tunnel also is not straight, its curved  so will help the first initial climb and speed seems adequate..

[Ghost]

Yep that is true Skruntie, to drive upside down for a distance is not possible
 BUT shumi is only upside down for a very short distance as he is doing an elongated looping. (hope its the right word)
so I would say its true.
sorry if I've miss understood anything, I'm having a blonde moment Lol

[threppence]

I must get my mind out of the gutter, thought this was going to be a discussion on the preference, or not, of implants.

[Mr Skrunts]

I must get my mind out of the gutter, thought this was going to be a discussion on the preference, or not, of implants.

Thats what I originally thought.

Am sure we could come up with enough pictures between us on the forum for a real or fake question fun time.   

[Ghost]

I must get my mind out of the gutter, thought this was going to be a discussion on the preference, or not, of implants.

Thats what I originally thought.

Am sure we could come up with enough pictures between us on the forum for a real or fake question fun time.   

 [smiley=evil.gif] [smiley=evil.gif] [smiley=evil.gif]

[Turk]

Real or Fake ?   I think the wink at the end of the "stunt" is a bit of a give away.