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There are a couple other arguments in favor of 24 volts:

1. Smaller wire sizes for the same power transfer. Small weight savings on a plane the size of a Lancair. BIG difference on a commercial airliner.

2. Most Mil-Spec components (relays, valves, etc) are much more readily available in 24 volt versions. Most 12 volt stuff is from the automotive industry. Not necessarily a bad thing, but component ratings are less consistant and flammabiliy is a concern on some of the plastic parts.

Jim McMillan

LML website:   http://www.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.