> On Wed, 2005-08-31 at 18:26, David Van Horn wrote:

>> Well, if you manage to exceed 1G on a flat road, let me know. :)

> AAFD class drag race cars do .25 mile standing start in about 4.7
> seconds, reaching a peak speed of >300MPH, exceeding 4G for some of 
> the
> race, on a flat road.

True enoughish.

But they are 'glued' to the track surface with a very special 
expensive dynamic glue. It's stored as a solid on the surface of the 
big black round things that you see on either side at the back. It's 
converted to semi liquid glue at the surface layer shortly before 
'launch' and during the very few seconds that it is required to glue 
the car dynamically to the track by application of heat, generally 
applied by the engine causing friction between the glue dispensers and 
the track surface. Said glue sticks aka tyres are rather expensive and 
don't last many races. Suitable dispensers for road use tend to be far 
cheaper and are usually not used in this mode - classic friction is 
generally easier on the tyres. Some road vehicles can sometimes manage 
more than 1g either accelerating or under brakes - but it takes lots 
of good design, good equipment, skill and luck.



        RM


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