Frank's Roundhouse Stock Cars - QSI
In the 1990's, QSI installed their custom Live Action animal sound units into Frank's Roundhouse produced stock cars. A sensor inside the car increases or decreases the animal sounds based on the train ride. The faster and jerkier the ride, the more frantic the animal sounds become. QSI also sold stock cars without sounds.
View inside the QSI Halloween stock car. The pendulum motion sensor is mounted on top of the sound board. Power comes from a standard 9-volt battery (not pictured). Photo courtesy of T. Wagner.