Comparison of Engines
Images of a glowplug engine and a "diesel" engine are shown below for comparison. The most obvious external difference is seen on top of the cylinder head. The glowplug engine has a pin, which is an electrical connector for the glowplug. The "diesel" engine has a T-bar which is used for adjusting the compression. The cylindrical object behind the glowplug engine is an exhaust silencer or muffler.
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Glowplug engine
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Diesel engine
Read more about this topic: Model Engine
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—Henry David Thoreau (1817–1862)
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