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23 Cards in this Set
- Front
- Back
- 3rd side (hint)
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In what position should the crankshaft be when a Magneto is been timed to the engine? |
At the position where cylinder number one is in the correct position for ignition to occur. Normally 30° before Top-dead-center on the compression stroke. |
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What is the purpose of a cold cylinder check? |
To determine if a cylinder is not firing. |
Run the engine for a few minutes at the speed, and on the Magneto , at which it runs roughest shut it down and feel the exhaust stack near the cylinder head, the cylinder with the stack that is not as hot as the others is the cylinder that is not firing. |
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What is checked on an engine run up to determine the operational condition of the engine? |
Idling RPM Manifold pressure Engine acceleration Maximum static RPM Magneto drop Ignition switch safety check Propeller pitch change Propeller featherin nog Oil and fuel Pressure
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How can you determine the firing order of an 18 cylinder radial engine? |
Begin with cylinder number 1 add 11 and Subtract 7 Whichever +11/-7 keeps the numbers between 1 and 18 1-12-5-16-9-2-13-6-17-10-3-14-7-18-11-4-15-8. |
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What are two main causes of a cylinder having low compression? |
1. Pistn rings not sitting or broken, 2. valves not sitting or burned. |
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What is hydraulic lock in an aircraft engine? |
Condition when oil has drained past the piston rings and filled the combustion chamber of the cylinders that are below the center line of the engine. |
If the crankshaft is turned over in the cylinder for this oil in the cylinder it will lock and there is a probability that the piston, cylinder or connecting rod will be damaged |
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How is hydraulic lock removed? |
Remove the spark plug from the locked cylinder and drain all of the oil out, clean the spark plugs and replace it. |
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What is a low-tension ignition system? |
An ignition system that uses a Magneto with a brush-type distributor and a coil with no secondary wiring. |
Low voltage is directed from the Magneto to the transformer mounted on the cylinder head. The low voltage is boosted to a high voltage and is directed through a very short high tension lead to the spark plug. There's one transformer for each spark plug. |
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What is a floating cam ring on a large radial engine? |
A circular piece of steel with a series of cams or lobes with a large amount of clearance between the bearing and the ring. |
When adjusting the valves on an engine with a floating cam ring the pressure of the valve springs on the opposite side of the engine must be removed so the cam ring will be tight against the bearing for the valves being adjusted. |
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Why is valve clearance adjusted on radial engines, but not on most horizontally opposed engines. |
The horizontally opposed engines have hydraulic valve lifters that keep all of the clearance out of the valve train, while radial engines have solid lifters. |
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Why are both the hot and cold valve clearance given for most radial engines? |
For valve timing purposes. The timing is adjusted with the valves and cylinder number one set to hot clearance. When the timing is set, all the valves are adjusted to their cold clearance |
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What must be inspected to determine airworthiness of an engine installation? |
The propeller, Lubrication system, Ignition system, Fuel metering system, Cooling System, Exhaust system. |
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What checks should be made to determine the proper operation of reciprocating engine installation? |
Idle RPM and mixture, Max Static RPM, Propeller pitch Change operation, Magneto check, Ignition switch safety check, Carburetor heat check. |
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Where can you find the correct grade of fuel and correct amount of engine lubricating oil for an aircraft engine? |
Type Certificate Datasheet (TCDS) for the aircraft |
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What are the basic steps in troubleshooting an engine installation? |
Know how the system should operate Observe how the system is operating Divide the system to isolate the trouble Look for obvious problems first. |
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Where do you find the procedures to follow when correcting a defective condition in an aircraft engine? |
In the engine maintenance manual |
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Where do you find instructions for removing an engine from an aircraft? |
In the aircraft maintenance manual |
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What must normally be done to a nose-wheel airplane before removing an engine? |
The tail of the airplane must be supported. |
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What must be done to the cylinders to protect them from rust and corrosion when preparing the engine for long time storage? |
Spray the inside of the cylinders with preservative oil and replace the spark plugs with desiccant plugs. |
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What should be used to cover the ends of the fuel and oil lines that have been disconnected from the engine? |
The correct plugs or caps, never cover the end of a line with tape |
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What is meant by QEC engine Assembly |
Quick Engine Change. An engine with all its mounts and all of the accessories installed, a minimum of time is required to change the engine, all that is needed is for the controls, wiring, and fluid lines to be connected to the firewall. |
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What is meant by Rigging the engine controls so they have some cushion? |
The control on the engine component must contact its stop, before the control handle in the cockpit reaches its stop. |
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What are two ways of pre-oiling and engine? |
Before the spark plugs are installed, and after the oil tank or sump is filled, turn the engine over with the starter until the oil runs out of the fitting to which the oil pressure gage connects. Or Use a pre-oiler tank. Air pressure forces oil through the oil passages until some of it flows from the oil pressure gauge fitting. |
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