Variable Speed Drive

Because the variator keeps the engine turning at constant RPMs over an array of vehicle speeds, turning the throttle grip will make the moped move faster but doesn’t change the sound coming from the engine just as much as a conventional two speed or one...

udl speed variator

A Variable Frequency Drive (VFD) is a type of engine controller that drives an electric electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are adjustable speed drive, adjustable quickness drive, adjustable...

greenhouse vent opener

The poly tubes, held set up along the sidewall with retainers, are inflated in two stages by small blowers to provide two degrees of ventilation. A back-up generator or 12 volt battery operated blowers are had a need to handle power interruptions.Hobby greenhouse kits...