Looking for 57 mm instruments

On Sat, 21 Sep 2019 08:00:36 -0700, markmocho53 wrote:

I should have specified: Mechanical Vario and ASI wanted. The new panel
will have an LXNAV V8 and 9000, along with a Butterfly display. I want
mechanical vario, ASI and altimeter as backup in case of electrical
failure. (Like too much smoke in the cockpit.)

Don't turn down a 57mm Borgelt B.40 if offered one: It normally runs off
the standard 12v panel power but can have a 9v PP3 battery strapped on
the back, which will run it for (IIRC) 12 hours if the main batteries
fail. Its power switch lets you select external 12v or 9v backup.

I use one as my backup vario and wouldn't willingly swap it for anything
else except, maybe, a B.400.


--
Martin | martin at
Gregorie | gregorie dot org