Cambridge 302 problem: "Could not get FAT.(A)" while trying to download flight logs

I use the slow alarm in my '26E. For an alarm at around 46 knots
indicated,
I had to set the trigger pojnt to 40 or so - though it tends to vary
by a couple knots from day to day. It does seem to be connected to
the G meter, as the tone comes on at a higher speed if I'm pulling
more G.

The tone is kind of modulated as you describe, but it's still easy to
to 'read' the vario strength.

I've played with the display in screen 10 of the 302 to compare what
it thinks my IAS is vs the mechanical airspeed. It's within a couple
knots at 65-90, but below 65 it reads slower than the mechanical.
They're tee-d to the same pitot, so without adding a 3rd ASI, I really
don't know which is correct. I find that the ship thermals best just
a bit under 50 KIAS, and much below 46 is nearly impossible to
maintain control. This is why the slow alarm is set there.

-Tom

(Andy Durbin) wrote in message . com...
When thermalling at 60-65kts the vario tone was modulated by what I
can only describe as a cavalry charge bugle call. Yes, this is
probably the slow alarm but it should not have been sounding as the
slow alarm speed was set to 40kts.