A traditional panel (all avionics off at
engine start) is OK at 12V.
With the newer system you usually have an
engine monitor on and maybe other things an EFIS, PFD, …
when you start.
When you hit the starter with these
electronics on you get quite a voltage drop on the buss. This drop is
often the culprit to avionics that have
died during engine start. (And NOT over voltage or voltage spikes
as many have believed in the past)
With a 24V system you have a lot more
headroom before you drive the electronics into a low voltage state.
Most can handle 10-30V. I can provide you
with details of why if you like …
Another plus is that you have smaller
wires because the current in general is ½ that of a 12V system.
You may be able to use 1 size smaller wire
for everything.
r.t.s.
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of marv@lancair.net
Sent: Wednesday, December 19, 2007
8:11 PM
To: lml@lancaironline.net
Subject: [LML] Lancair 4p and 12v
panel
Posted for "John C. Bohn"
<JohnB@AGCEngineering.com>:
Im looking at purchasing a plane with a 12v panel and Jermey at Lancair says
they're problematic. Anyone heard of this before.
John Bohn
5038872933
--
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