The CH-47 Chinook Ramp Area

 

 

         
CH-47D Utility Pressure Control Module.

             The Utility Hydraulic System Power Control Module.

 

 

         
CH-47D Utility Pressure Control Module.

             The Utility Hydraulic System Power Control Module. This photograph was taken with the Aft Pylon removed. Click-N-Go Here to view a larger version.

 

 

             A question often asked is why is there both a Pilot Solenoid Valve and a Pressure Operated Valve for the various subsystems on the Utility Hydraulic Power Control Module (applies somewhat to the Flight Boost Modules as well). The answer is simple. It takes a small amount of electrical power to operate a Pilot Solenoid Valve and control a small amount of hydraulic fluid. The Pressure Operated Valve, which sends hydraulic power to the various subsystems, controls a large amount of fluid. By utilizing the Pilot Valve to control the flow of fluid to the Pressure Operated Valve, component size can be kept to a minimum. If only an electrically controlled Pressure Operated Valve was utilized in the design, the valve - and hence the entire module - would need to be quite large. For aircraft design purposes, this would be impracticable.

 

 

         
Utility Hydraulics System Power Control Module component layout diagram.

             A drawing showing the Utility Hydraulics System Power Control Module component layout. Click-N-Go Here to view a larger version.

 

 

         
CH-47D Utility Pressure Control Module.

 

 

         
CH-47D Ramp, RH side, Power Steering Module.

 

 

         
CH-47D Ramp, RH side, Chip Detector Fuzz Burn Off Module Area.

 

 

         
CH-47D Ramp Area, RH side, Maintnenance Panel.

          The Maintenance Panel. Click-N-Go Here to view a larger version.

 

 

         
The Right hand side of the Ramp Area on a CH-47D helicopter.

             The Right hand side of the Ramp Area on a CH-47D helicopter. Click-N-Go Here to view a larger version. By examining the photograph, who knows what type of engines are installed on this helicopter? Email Us and see if you do.

 

 

         
View looking down of the top of the Utility Hydraulic System Return Module.

             A view looking down of the top of the Utility Hydraulic System Return Module. The photograph was taken with the Aft Pylon removed. Click-N-Go Here to view a larger version.

 

 

         
The Number One side Engine Fuel Valves.

             The Number One Side Engine Fuel Valves. In this image, there is a decal attached the fuselage skin that is incorrectly worded. Can you spot it? Click-N-Go Here to view a larger version.

 

 

             Did you know? Touchdowns with the ramp level and a pitch attitude in excess of 15 degrees nose high will cause the ramp to strike the ground.

 

 

          The CH-47 - 40 years old and still circling the world.

         

          Comments or Questions ? Email the Webmaster. Email the Webmaster.