Kev wrote:



Yes, backup battery or alternator. The latter is a better choice I'd
think, since a battery only gives about an hour. If it's belt-driven
though, it seems risky to me.

You would get a dedicated battery for the FADEC, the ones I've seen are
smaller than a motorcycle battery and this would easily outlast your
fuel supply at any power setting that keeps you aloft. It draws very
little currrent.