The HPI Pro 4 is a 1/10 scale

radio controlled Radio control (often abbreviated to RC) is the use of control signals transmitted by radio to remotely control a device. Examples of simple radio control systems are garage door openers and keyless entry systems for vehicles, in which a sma ...

touring car Touring car and tourer are both terms for open cars (i.e. cars without a fixed roof). "Touring car" is a style of open car built in the United States which seats four or more people. The style was popular from the early 1900s to the 1930s. Th ...

manufactured by Hobby Products International (HPI). It features a centre

propshaft A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power and torque and rotation, usually used to connect ...

to transfer the power from the motor to the rear and the front ball differentials. The

gearbox Propulsion transmission is the mode of transmitting and controlling propulsion power of a machine. The term ''transmission'' properly refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive vehicles), differe ...

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 Pro4

HPI Pro4 Facebook fans page
Pro 4