Total electrical failure - (hypothetical)

On Thu, 24 Mar 2005 15:46:41 -0800, "C J Campbell"
wrote:


"Michael" wrote in message
roups.com...

That's because they lack vacuum
Nonsense. Most of them have backup vacuum instruments and even have
dual
vacuum pumps, which older airplanes lack.

What piston single has backup vacuum and backup electric?

All of the Cessna G1000 airplanes.

I'd have to go check my POH to be sure, but I'm pretty sure that the
G1000 Cessnas don't have 2 pumps. It has a single AI and a vac pump
as a backup to the glass system. As for the electrics, depends on
what you classify as "backup electric". If you're talking fully
redundant alternator and feed, it doesn't have that either - it has a
backup battery good for ~30min of reduced functionality (if memory
serves the PFD, 1 com, 1 nav, 1 GPS).

The 172SP has 2 vac pumps. Course, the plumbing goes through 1 T
connector before the firewall, but still. Fails the backup electric
test though.