The HPI Pro 4 is a 1/10
scale
Scale or scales may refer to:
Mathematics
* Scale (descriptive set theory), an object defined on a set of points
* Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original
* Scale factor, a number ...
radio controlled touring car manufactured by Hobby Products International (HPI). It features a centre
propshaft to transfer the power from the motor to the rear and the front ball
differentials. The
gearbox features a bevel-and-ring gear design, and is made of graphite-reinforced plastic. The car is extremely popular with racers all around the world, because of its ability to be tuned to different track conditions. The Pro 4 won the 2004 National Championship.
External links
Comprehensive description of the HPI Pro4HPI Pro4 Facebook fans page Pro 4