| Slot car racing is a leisure activity of racing | | | | railroading. |
| electronically motorized model cars that are made | | | | Most slot cars are models of real automobiles, but |
| to run on tracks with a groove or slot to steer a | | | | some racers choose to have custom body styles. |
| car. Users can operate the racecars by means of | | | | Most patrons use commercially available slot cars, |
| hand-held controllers or throttles that regulate | | | | others choose motorized static models, and some |
| small, electronic motors hidden inside the cars. | | | | create their own mechanisms and bodies from |
| Greater pressure on a throttle generates a | | | | fundamental parts and equipment. |
| greater pace. Each car runs on a separate path, | | | | There are three regular slot car scales - 1/24 |
| within its own slot. The challenge in racing slot cars | | | | scale, 1/32 scale, and HO (Half 'O') size (1/87 to 1 |
| is in taking curves at the highest speed that will | | | | 64) scale. There are two large HO racing |
| not cause a car to lose its grip on a track and | | | | organizations in the U.S., namely HOPRA (H.O. |
| turn to one side or deslot and go in the air. | | | | Professional Racing Organization) and UFHORA |
| Many slot car racers favor a racetrack | | | | (United Federation of H.O. Racers Association). |
| unobstructed by scenery, but some fans, like rail | | | | Each hosts a national competition once in a year, |
| transport modeling with highly structured tracks, | | | | usually in July. There are many state-wide |
| carved to have the look of a real-life racecourse | | | | associations running under these two organizations. |
| complete model buildings, trees, and people. Slot | | | | H.O. racetracks can fit in common basements. |
| car racing has fewer followers than that of model | | | | |