|470944-9029 HARTZELL VALVE ASSY|
|HARTZELL CONTROLLER, VARIABLE ABSOLUTE PRESSURE; REPLACES CMI 633388-10, 641434-4|
|470836-9003 HARTZELL CONTROLLER|
|470836-9019 HARTZELL CONTROLLER|
|470836-9020 HARTZELL CONTROLLER|
|470836-9021 HARTZELL CONTROLLER|
|HARTZELL CONTROLLER, DENSITY; REPLACES LYC LW-10682|
|470884-9004 HARTZELL CONTROLLER|
|470884-9010 HARTZELL CONTROLLER|
|470886-9002 HARTZELL CONTROLLER|
|470948-9001 HARTZELL CONTROLLER|
|HARTZELL CONTROLLER HSG 476644-0000|
|481008-9025 HARTZELL CONTROLLER|
|HARTZELL CONTROLLER, SLOPED; REPLACES CESSNA C165004-0701|
|481058-9001 HARTZELL CONTROLLER|
|470780-9015 HARTZELL WASTEGATE|
|470818-9003 HARTZELL WASTEGATE|
|470830-9010 HARTZELL WASTEGATE|
|470830-9020 HARTZELL WASTEGATE|
|470842-9007 HARTZELL WASTEGATE|
|470842-9004 HARTZELL WASTEGATE|
|470892-9002 HARTZELL WASTEGATE|
|470908-0011 HARTZELL WASTEGATE|
|470908-9011 HARTZELL WASTEGATE|
|470908-9012 HARTZELL WASTEGATE|
|470908-9013 HARTZELL WASTEGATE|
|470908-9015 HARTZELL WASTEGATE|
|HARTZELL FACTORY REBUILT WASTEGATE; REPLACES CESSNA C165006-0114|
|470944-9015 HARTZELL VALVE ASSY|
|470944-9024 HARTZELL VALVE ASSY|
|470944-9026 HARTZELL VALVE ASSY|
|470954-0005 HARTZELL NEW WASTEGATE ASSY|
|HARTZELL WASTEGATE; REPLACES LYC 47J21296|
|HARTZELL FACTORY REBUILT WASTEGATE; REPLACES LYC LW-12960|
|HARTZELL FACTORY REBUILT WASTEGATE; REPLACES CESSNA C165006-0601|
|HARTZELL VALVE, POPPET 477285-0001|
|HARTZELL VALVE, POPPET 477285-0002|
|HARTZELL VALVE COVER 477306-0000|
|481064-9001 HARTZELL WASTEGATE|
|481064-9002 HARTZELL WASTEGATE|
Controllers may be found in multiples or combined in a common housing. Regardless of the arrangement, they operate in parallel, even while responding to differing stimuli. Depending upon their installation, controllers may be plumbed directly into the upper deck air-stream or remotely mounted and referenced by means of hoses. Most systems are automatic but not all turbocharging systems are automatically actuated. Instead, systems like those found in the Turbo Arrow and some Mooney's have a simple, built-in exhaust leak upstream of the turbo that allows a fraction of the exhaust gases to be dumped overboard and the remainder to be routed through the turbine. A "fixed" wastegate arrangement.
The controller(s) could be appropriately thought of as the brains or command center for the entire charge-air system. As engine power, speed, or altitude is changed, the controller constantly strives for equilibrium within the system. The exhaust bypass valve (wastegate assembly) simply acts as a slave to the dictates of the controller. Engine oil becomes the muscle of the system, providing the power to actuate the movements of the wastegate assembly.
The Pilots' responsibility is to ensure that manifold pressures stay within their prescribed limits. But, humans are known to be fallible. With this in mind, thoughtful engineers sought to incorporate a secondary safety feature known as an absolute Pressure Relief Valve ("pop-off valve"). This valve is strategically positioned between the compressor outlet and the fuel injector/carburetor to prevent engine-damaging surges in manifold pressure. The valve head is normally held in the closed position by a spring/bellows combination. It is set to off-seat at approximately two inches above normally rated MAP.
Continental Motors compares the operation of this spring-loaded valve to a safety valve in a steam boiler. As excessive pressure builds, the valve opens and stays open until the manifold pressure again falls within acceptable limits. The aneroid-style bellows allows the valve to "crack" open at a specified pressure regardless of the operational altitude of the engine.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.