These mowers are used for cutting grass, brush, and limbing. The electronically controlled Articulated Arms are combined with Rotary or Flail mowers that are hydraulically driven using an independent reservoir that is isolated from the tractor. One of the unique characteristics of the Little Boom is the direct acting rotary cylinder used for angular positioning of the Boom. The rotary actuator eliminates push-pull cylinders and linkages for improved reliability and reduced maintenance. The actuator has a massive bearing area with hydraulically pressurized thrust bearings to take the load.