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- - Teledyne Continental IO-550-C
- - Norm aspirated
- - fuel injected direct drive
- - air-cooled
- - 6 cylinder
- - horizontally opposed
- - 550 cubic inch displacement
- - 300 HP
Tell me about the props
- - McCauley
- - 3 blade
- - variable pitch
- - 77 inch
- low pitch @30'' station - 15.2
- feathered - 82.5
Fuel System overview
- 172 lbs total
- 166 lbs usable
must have 13 gal per wing min to takeoff
Vapor Return line - returns excess fuel from engine to its respective wing system
6 drain locations
float type fuel quantity indicators
Max Landing Weight
Max Take-Off Weight
Max Continuous Power
Max Cylinder Head Temp (CHT)
Min Take-Off Oil Temp
What is the starter limit?
30 seconds in any 4 min
Where is the Reference Datum?
83.1'' forward of centerline through forward jack points
Max Airspeed In Icing Conditions?
What conditions will the GearUp caution illuminate?
- - Gear up with full flaps
- - Gear up with Manifold Pressure below 13'' on both engines
How do the Control Surfaces operate?
Bearing supported and operated by push/pull rods and a conventional chain/cable system terminating in bell cranks.
How do we control steering on the ground?
Nose wheel steering - Spring loaded linkage from nose gear to rudder pedals
What are the flap positions?
- up - 0°
- Apch - 15°
- Down - 30 °
What controls the prop RPM?
How does the Synchronizer work?
Matches RPM of engines to 25 RPM
Magnetic pickup mounted in each prop gov sends electric pulse to a transistorized control box behind the pedestal
Control box converts pulse rate into corrective commands that are sent to the approporite gov
Normally each engine uses fuel from its respective fuel tank.
If there is an engine failure fuel can be taken from either side
Fuel can NOT be transferred between the two tanks
Fuel Boost Pumps
dual-speed, dual-pressure, electrically-driven, vane-type pumps
Pumps Switch - HI, LOW, OFF
When would you have the fuel boost pumps on LOW?
minor vapor purging
incrase fuel flow
When would you have the fuel boost pumps on HI?
Normal start, priming
extreme vapor purging
to provide fuel pressure for failure of engine-driven fuel pumps
Tell me about the Batterys
- (2) 25 amper-hour
- 12 volt
lead acid connected in series (in the floor of nose baggage area)
Tell me about the alternators
- (2) 100 amp
- 28 volt
- gear driven
- alternator controll units
- regulate volate
- balance the load
- provide overvoltage protection
Need 300 amps for starting
50,000 BTU combustion heater
takes fuel form left tank (1gph)
Instrument Air Pressure System supplies air to what systems?
- Flight instruments
- De-ice boots
supplied by 2 engine driven, dry pressure pumps, interconnected forming one system
EDP pressure compresses air - through pressure regulators - to the distributor manifold
Distributor valve decides to apply pressure or vacuum
- AUTO - inflates for 12 seconds
- Manual - inflates as long as switch is depressed
Do not inflate in temps colder than -40
continuous in-flight use
limit of 10 min on ground
On-Off circut braker
when the system is on the ammeter will show 14-18 amps
Stall warning (anti-ice)
Heated fuel vents (underside of each wing outboard of nacelle
What are the 4 Critical Engine Factors?
- P-Factor (asymmetrical Propeller Loading)
- A-cceldrated slipstream
- S-piraling slipstream
What are the 11 Vmc criteria used by the manufacturer?
- Critical engine windmilling
- Operating engine at takeoff power
- Maximum takeoff gross weight
- Bank ≤ 5° torward good engine
- Adverse (aft) CG
- Takeoff configuration
- cowl flaps
- gear up
- trimmed for takeoff
- out of ground effect
- Sea level density altitude