i'm thinking Vekoma.
In that case....
''Riders experience a launch from zero to 90 kilometers per hour in less than three seconds on our LSM (Linear Synchronic Motor) Launch Coasters.
The power of the launch forces you back into your seat with more than 1.5 G grasping for breath.
A number of fast turns and smooth inversions let you experience this marvelous roller coaster ride with its three inversions and a maximum G-force of 4.5 G's.
In new designs launch speed can even be increased up to 150 kilometers per hour!
To reduce power demand, our newest launch coasters can also be equipped with a new hydraulic launch system.''
It has a very compact layout, with quite low clearance (height) And could easily fit in ug-land. http://www.vekoma.com