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8 Cards in this Set
- Front
- Back
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What is the main advantage of a horizontally opposed engine over a radial engine for powering modern aircraft?
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The horizontally opposed engine has a much smaller frontal area and is easier to streamline than a radial engine.
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How many throws are there in the crankshaft of a six-cylinder horizontally opposed engine?
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Six
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What kind of connecting rod arrangement is used in a radial engine?
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A master rod connects the single throw of the crankshaft with a piston. All of the other Pistons are connected to the master rod with link rods.
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Of what material are most piston rings made?
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Gray cast iron.
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What is the reason for using hydraulic valve lifters in an aircraft engine?
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Hydraulic valve lifters keep all of the clearance out of the valve operating mechanism. This decreases the wear of the valve train components.
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At what speed does the camshaft turn, relative to the crankshaft speed in a horizontally opposed engine?
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The camshaft turns at one half of the crankshaft speed.
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What kind of main bearings are used in a horizontally opposed engine?
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Steel-backed, lead-alloy bearing inserts.
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On what stroke is the piston of a reciprocating engine when the intake valve begins to open?
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On the exhaust stroke.
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