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How Large Can the Gaps Be?
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English
Abstract
A SET of curves has been developed that makes it possible to determine the maximum permissible spark-plug gap that can be fired by voltages transmitted through this critical region, the spark-plug barrel.
The investigation that led to the development of these curves consisted of the following steps:
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1.
To determine a satisfactory way to simulate engine operating conditions in trie laboratory, this to consist of a correlation of spark-plug bomb pressures to various conditions of engine power.
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2.
To determine the sparking voltages required to fire various gaps at the different bomb pressures corresponding to various engine power configurations.
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3.
To determine experimentally the breakdown voltage for various spark-plug barrel configurations at different altitudes and to express this relationship analytically.