🚀 go-pugleaf

This is a response  to my  own note.   I've  answered many  of my own
questions, so I'll post my gyro experiment results.  

The Gyro mounted in my car works great.  Trips  to and  from work (20
miles) and a three hour trip on windey roads  have caused essentially
unmeasurable errors.  Less than 2  degrees (which  is the positioning
error of my car in the reference driveway).  

So onward and upward.  I'll be  testing it  in the  boat this spring.
The next step is to integrate it with the boat's distance  log and to
derive a single course and distance.  (Given a  known starting point,
where am I:   angle and  distance?)   99% of  the navigation  I do is
solving  this  problem, mostly  on trips  (or legs)  under 100 miles,
often in the fog.  

>-- Is it intended to readout in the horizontal plane  (azimuth) or is
>it intended to be in the vertical plane (roll).  Seems to do both.  

Works fine in the H plane. That's all I need.

>-- Is it a free gyro  (stands still  as the  earth turns)  or does it
>   seek north? 

It  doesn't  seek north.   Why  it doesn't  stand still  as the earth
turns, I still don't know. Maybe magic.  

>-- How is the interface to a four terminal pot normally done?

I have it worked out.  I apply a two phased voltage to the terminals,
then do two measurements to find angle to nine bits.  

>-- How much error is introduced by motion. 

Not much.
				Dave Erickson
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Datacube Inc. 4 Dearborn Rd. Peabody, Ma 01960 	617-535-6644
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