INTRODUCTION
Originally developed to wash the Makila 1A engines in the Cougar helicopter, the Lightweight Engine Compressor Wash Rig (JMP/COUG/D/2046) is a portable rig suitable for transport in aircraft and helicopters. The rig consists of a 19.5 litre (5.15 U.S. gallons) stainless steel vessel mounted on a steel frame. Two 9” diameter rubber tyred wheels run on a solid axle which is welded to the frame. The front of the rig is supported by a metal foot which is attached to the frame.

GENERAL
The fluid in the vessel is withdrawn by a 24 / 28V gear pump which is situated at the rear of the rig. Control of the output flow is achieved by a flow rate control valve which returns a portion of the fluid back to the fluid vessel when it is opened. A watertight switch, situated adjacent to the gear pump, controls the pump.

When the gear pump operates the fluid is withdrawn from the vessel through a 100 mesh filter. From there it is directed through the outlet manifold to the outlet hose. The outlet hose is 3.05m (10 ft.) long and is stowed by winding around the top and front of the rig. A female quick release coupling is installed on the end of the outlet hose. A rubber protective collar is installed on the end of the outlet hose to protect the coupling from damage.