Re: First the AI, then the DG, then...?

"Jay Honeck" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> > WOW, sure is!  Isn't the new STec DG around $2300?
> 
> Yeah, for some reason electric DGs are outrageously more expensive than
> vacuum ones.
> 
> Anyone know why?

 So few made. Most general aviation aircraft use vacuum or air-driven
attitude and heading indicators, and an electric turn coordinator to
provide some redundancy if the vacuum fails. Electric DGs and horizons
would be used as backups in much larger airplanes, like the small
electric attitude indicators in the centre of most airliner panels.

          Dan