"Peter" wrote in message
...

"Julian Scarfe" wrote

I looked briefly at a couple of the brochures on the Shadin site after you
posted, and saw mention of True Air Temperature in one, Total Air
Temperature in another. Maybe Peter knows which model the ADC was?

I am no nearer to the truth...

The owner of the Shadin ADC doesn't know which model he has.

In the KLN94B manual, page 5-39, which describes the page which
becomes operational when an ADC is connected, it says

SAT Static air temperature (the actual temperature of the
surrounding air mass).

TAT Total air temperature (the air temperature including heat rise
due to compressibility. This is the temperature measured
directly by the outside air temperature (OAT) probe.

Prs Pressure altitude (to nearest 100 feet or 10 meters).

Den Density altitude (to nearest 100 feet 10 meters).

which doesn't make a lot of sense because when the ADC is fitted,
there is a 2nd OAT probe.

Either way, the Shadin should be reading the same or lower than the OEM OAT
guage. I am flying on Wednesday and if the opportunity presents itself (VFR
here in the PNW) I will try leveling off recording the spread between the
OAT guage and the temp displayed by the Shadin at two different speeds to
verify that the spread widens as speed increases.

Mike
MU-2