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Re: MEMS

Subject: Re: MEMS
From: Tom & Cathy Friedland <tfriedland@home.com>
Date: Fri, 23 Feb 2001 11:39:28
Brian

How hard would it be to use your "cheap rate gyros" to use as sensors for a 
simple
wing leveler autopilot that would control a MAC servo on the aileron trim?

Tom Friedland A 079 mono J3300

Brian Rauchfuss - PCD wrote:

> > I quote New Scientist: tiny chip-sized micro-electromechanical systems 
> > include
gyroscopes, tilt sensors and accellerometers which can be bought off the shelf
and plugged in , made in a similar way to silicon chips so they're cheap.
Now why do I have to have a bloody great suction pump and a tonnage of whirling
dervishes in my dashboard just to get the same information?  I could now surely
put my flight simulator software to good use and have an image on my palm-top
in the cockpit just like the one on my play-screen, which , with input from
the Garmin, is topographically correct and visually corresponds to the attitude,
speed, etc of the aircraft. All for a few bob. What's wrong with the world
- the technology exists and is cheap and we haven't got it. Woe!.....h
>
> Unfortunately, the cheap chip-gyros are not very accurate, and the accurate
> chip gyros are very expensive.  You can get some very nice, cheap rate
> gyros which are good for the turn-and-bank indicator (as seen in the NavAid
> autopilot) ... but they drift far too fast to be useful for the attitude
> indicator.  You can get some very accurate laser-ring-gyros which will work
> for the attitude (as seen in the Sierra Flight Systems display), but they are
> very expensive.
>
> Maybe soon the chip gyros will become more accurate ... I sure hope so!
>
> Brian



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