Hi,

Is there anyone who has more information about an Askania AIS type Lr 27r? On the backside there is a text in Dutch that is is an adjustable speed indicator. What was the purpose of such adjustable indicator?

Gruss,

Mathieu.

Hi Mathieu,

I don't know anything about the Askania Lr 27r specifically, but in general terms, Askania was a manufaturer of autopilot systems which at least in some implementations included pitch control to meet a pre-set target speed.

The target speed could be set by adjusting a second hand on special (Askania-made) speed indicators to the desired target speed value.

If you look at this list, it includes one example for such a speed indicator (though it doesn't seem to be identical to your example, I believe), which has no Fl. number:

http://cockpitinstrumente.de/instrumente...fahrtmesser.htm

The reference is "Gerät-Nr.127-253 C", they key term is "Sollfahrtgeber" ('target speed encoder').

Maybe that one is similar to your adjustable speed indicator?

Regards,

Henning