If engine failure seems imminent induce a backfire by turning the magneto switch to off and then back on. A backfire may be further induced by leaning. The backfire can jar any ice loose.
Indications of a transient/intermittent stall are usually an intermittent 'bang' as backfire and flow reversal take place. If the stall develops and becomes steady, strong vibration and a loud roar may develop from the continuous flow reversal.
If the engine backfires during start, not uncommon with Jacobs radials, you can wind up with an induction fire. Standard procedure is to continue cranking to suck the flames back into the engine.
The Tupolev Tu-22M (NATO reporting name "Backfire") is a supersonic, swing-wing, long-range strategic and maritime strike bomber developed by the Soviet Union. Significant numbers remain in service with the Russian Air Force.
The practice of selling more airline seats than are available on a specific flight, to make up for no-shows. Usually backfires on the carrier and at times can create much consumer ill-will.
A stick used to "flip start" a model airplane engine and hence save your fingers from getting caught in the propeller when the engine starts or backfires.
See also: Propellers.
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