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→Number of Engines
Realistically, a small wing engine with a wimpy propeller is unlikely to have enough power in a severe-weather emergency. Two main engines is the only way to provide true redundancy. Alternatively, you might consider a single engine with an electric drive – it can be configured to use the house bank as an emergency source of power.
From a [[:Category:Arrangement|layoutperspective]] perspective, twin engines require a larger engine room, and may dictate an amidships layout. Twins mean twice as much cost and maintenance, and duplicate charging and fuel systems (not necessarily bad). Sometimes this results in two systems in some degree of disrepair.
==References ==
[[Category:PropulsionSystemsGeneral]]