Booster

A booster is a track accessory inserted at certain points of a track layout used to propel cars at speed using two wheels spinning at high speed to grab the car and propel it forward. Boosters come in numerous different kinds but all fulfill the same purpose.
The earliest boosters, the Super-Charger and 2-Lane Super-Charger from 1970, were powered by 3 "D"-sized batteries and featured a lever on the side for "Speed Shift Control". More recent boosters use 2 "D"-sized batteries and are smaller in profile, and usually do not feature any sort of speed control. Early boosters use foam wheels; most modern boosters use rubber wheels due to the fragility of the foam which has a tendency to wear down over time through continued use. Models without fender protection are not recommended for use in boosters as the booster wheels rotate with sufficient force to bend the axles.
Other specialized types of boosters include the vertical booster, such as the Power Booster from the Track Builder lineup and the boosters used in the 3-Lane Super Speedway. These tend to use external power outlets as opposed to battery power.
Category:Accessories