term1 Definition1term2 Definition2term3 Definition3
Please sign in to your Google account to access your documents:
What is the main advantage of a magneto ignition system over a battery ignition system for an aircraft reciprocating engine ?
A magneto has its own source of electrical energy, and it is not dependent upon the battery.
What is the function of the capacitor in a magneto ?
The capacitor minimizes arcing at the breaker points, and its speeds up the collapse of the primary current as the breaker points open.
What is a compensated magneto cam, and on what kind of engine is one used ?
A compensated cam is a special cam used in magnetos mounted on high-performance radial engines. The cam has one lobe for each cylinder, and the lobes are ground in such a way that the breaker points open when the pistons in the different cylinders are the same linear distance from top center.
What is the significance of the numbers on what kind of engine is one used ?
These numbers are the sparking order of the magneto, not the firing order of the engine.
What happens in a magneto ignition system when the ignition switch is placed in the OFF position ?
The primary circuit is connected to ground.
What is the reason for having a low-tension ignition system on some aircraft ?
Low-tension magnetos are used on aircraft that fly at high altitudes where there is a problem with flash-over in the high-tension magneto distributor.
What is the basic difference between a low-tension magneto and a high-tension magneto ?
The low-tension ignition system has only one coil in the magneto, and it uses a carbon-brush-type distributor. Low voltage is distributed to high-tension transformers that are located on the heads of each cylinder.
A high-tension magneto produces high voltage in the magneto coil, and it is sent to the correct spark plug by the built-in high-voltage distributor.
What is meant by an All Weather spark plug ?
A shielded spark plug that has a recess in the shielding in which a resilient grommet on the ignition lead forms a watertight seal.
What is meant by the reach of a spark plug ?
The length of the threads on the spark plug that screw into the cylinder head.
What is the difference between a hot spark plug and a cold spark plug ?
A hot spark plug has a long path for the heat to travel between the nose core insulator and the spark plug shell. In a cold spark plug, thr heat has a shorter distance to travel, and the spark plug operates cooler than a hot spark plug.
Need help typing ? See our FAQ (opens in new window)
Please sign in to create this set. We'll bring you back here when you are done.
Discard Changes Sign in
Please sign in to add to folders.
Sign in
Don't have an account? Sign Up »
You have created 2 folders. Please upgrade to Cram Premium to create hundreds of folders!