On Sep 27, 3:51*pm, Andy wrote:
On Sep 27, 2:57*pm, JJ Sinclair wrote:

Alas, yes they both require old fashioned dial altimiters. With todays
glass cockpits, I'm wondering if this requirement isn't outdated?
JJ

JJ - Can you, or anyone else, reference a regulation on altimeters
that includes the word DIAL.

91.205.b.2) *requires for VFR flight an "altimeter"

91.205.d.5) requires for IFR flight "a sensitive altimeter adjustable
for barometric pressure".

Neither requires a dial and neither requires a mechanical instrument.

Andy

I am also building a homebuilt sailplane and talked with the DAR
(designated airworthiness representative) about the instrumentation.
The answer I got was that it's pretty much up to him. I can have a
compass out of a child's toy if that's what I want and he's willing to
sign it off. Ditto for most of the other instruments.