On Fri, 5 Dec 1997, Sean Breheny wrote:
>
> have to reset your gyro at least this often. Very good gyros are used on
> missiles (there are even magnetically or air suspended gyros which have
> VERY little friction) and this is why they are able to work so well.

The quality of a mechanical (tuned rotor) gyro is determined by the
spinning mass and the rotation points as well as the sealed enclosure. A
near perfectly balanced gyro mass is the key.  Mass unbalances can cause
errors, and long term drift can result from the pre3cession errors.

Newer technolgies such as ring laser gyros and so forth have their place
in the gyro world, but the best for long term accuracy are form the tuned
gyro type.

Rob

>
> The gyros sold for model aircraft I believe are used to help fix an axis
> for certain aerobatic manuvers, and therefore do not need to be extremely
> accurate for very long periods of time (most RC flights last only about
> 10-15 mins before refueling).
>
> Sean
>
>
> +--------------------------------+
> | Sean Breheny                   |
> | Amateur Radio Callsign: KA3YXM |
> | Electrical Engineering Student |
> +--------------------------------+
> http://www.people.cornell.edu/pages/shb7
> Web Page Under Construction!
> mailto:shb7@cornell.edu
>