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l : l29-list@matronics.com 20 February 2006 • 2:55AM -0500

RE: RE: L29-List: Help - airspeed sensor
by Jorgen Nielsen

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--> L29-List message posted by: "Jorgen Nielsen" <jorgen.nielsen@mweb...>

Hi Bill, thanks.

May I dare ask if you or anyone has a schematic / wiring diagram of the box?

My airspeed indicator has 4 wires going into it, have played with a meter on
the indicator and on the wiring, was hoping to find a pressure activated
microswitch set-up.  But its not, seems to be a circuit inside.  From the
aircraft, 1 connector is earth, the other 3 has dv bus voltage on.  SO in
the airspeed indicator there must be some kind of circuit.  A friend has
offered to bring an oscilliscope to the aerie so we can try reverse engineer
the logic and get it bypassed.

Jorgen
  

-----Original Message-----
From: owner-l29-list-server@matr...
[mailto:owner-l29-list-server@matr...] On Behalf Of Bill
Sent: 19 February 2006 03:51 AM
To: l29-list@matr...
Subject: Re: RE: L29-List: Help - airspeed sensor

--> L29-List message posted by: "Bill" <czech6@kell...>

Jorgen,
It is located under the glare shield, left front. If you stand in your seat,
lean over the windshield, (as if looking from outside - in) it is on the
left side torwards the lower front of windshield. Yellow like a fuel
pressure sensor. I hope I remembered that correctly.

Bill


----- Original Message -----
From: "Jorgen Nielsen" <jorgen.nielsen@mweb...>
To: <l29-list@matr...>
Sent: Saturday, February 18, 2006 4:53 PM
Subject: RE: L29-List: Help - airspeed sensor


> --> L29-List message posted by: "Jorgen Nielsen"
> <jorgen.nielsen@mweb...>
>
> So  folks, no replies on this.  No-one have any ideas?  Does no-one else
> have the type of airspeed indicator with built in mach-meter?
>
>
>
>> --> L29-List message posted by: "Jorgen Nielsen"
>> <jorgen.nielsen@mweb...>
>>
>> Has anyone ever had a look at the box that senses airspeed and retracts
>> the
>> flaps automatically?
>>
>> I need to know what the electronic connection looks like (type of plug,
>> no.
>> of pins, etc).
>>
>> On mine this functionality was moved to a new tyoe of air speed indicator
>> which is now rather scarce (read unobtainable).
>>
>
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