EngineEngine

Cirrus SR22

12/23/03

GeneralGeneral

• Powered by a Teledyne Continental IO-550-N engine– Six cylinder– Normally aspirated– Fuel injected– 310 horsepower @ 2700 RPM– 2000 hour Time Between Overhaul (TBO)

• Dual magneto ignition system

GeneralGeneral

• Attached to airframe by a six-point steel mount structure attached to firewall

• Firewall attach points are reinforced with gusset-type attachments that transfer forces into fuselage shell

Oil SystemOil System

• Provides engine cooling, cleaning, and lubrication

• Delivers hydraulic pressure to governor which regulates propeller pitch

• Wet sump, high pressure system

• 8 quart capacity

Oil SystemOil System

• Components– Oil Pump

• Positive displacement pump located within engine case

– Oil Cooler• Incorporates a bypass valve

which isolates the cooler when the oil temperature is less than 180°F

– Oil Filter– Sump (Oil Pan)

• 8 quart capacity

Oil SystemOil System

• Engine should be operated with between 6 and 8 quarts of oil

• Oil and oil filter should be changed every 50 hours after engine break-in

• See section 8 of POH for approved and correct grades of oil

Oil SystemOil System

• Abnormal Conditions– Oil annunciator will illuminate if:

• Oil temperature exceeds 240°F

• Oil pressure is less than 10 PSI

OIL

Cooling SystemCooling System

• Accomplished through the combined effort of the oil system and air cooling

• Oil System – Air passes over the oil cooler drawing heat away from the oil returned to the engine

• Air Cooling – Baffels in the engine cowl direct outside air down through the cylinders and out the underside of the cowl

Air Induction SystemAir Induction System

• Air passes through a dry-foam air filter, through the throttle butterfly valve, into the engine manifold, and then into the cylinder combustion chambers

• Alternate Air– Use if main induction

becomes clogged– Pilot will note loss of engine

power and/or roughness– Source is inside cowl– Unfiltered air

Ignition SystemIgnition System

• Dual ignition system– 2 spark plugs per cylinder

• Two engine driven magnetos provide electricity for spark– Right Magneto

• Lower Right and Upper Left Spark Plugs

– Left Magneto• Upper Right and Lower

Left Spark Plugs

Exhaust SystemExhaust System

• Exhaust manifold connects each cylinder to the muffler

• Two mufflers, left and right

• Exhaust gasses vented at the underside of the engine cowl

• Heat exchanger on right muffler provides cabin heat

Engine ControlsEngine Controls

• Power Lever– Single lever that controls both

throttle position and propeller governor position

• Throttle– Controls amount of air

metered to cylinders from the throttle valve

• Mixture– Controls mixture control valve

located in the engine driven fuel pump

• Start/Ignition - allows selection of independent magnetos, both magnetos, and starter engagement

• Alternate Air – allows selection of alternate induction air. Located in the pilots foot well to the left

IndicatingIndicating

• Oil Warning Light• Tachometer• Oil Temperature• Oil Pressure• Exhaust Gas

Temperature• Cylinder Head

Temperature• Fuel Flow • Manifold Pressure