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Help - airspeed sensor

 
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czech6(at)kellin.net
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PostPosted: Sun Feb 12, 2006 9:19 am    Post subject: Help - airspeed sensor Reply with quote

I happen to have those very instruments. You can get a replacement "G" meter
and compass pretty cheap that are better.

Bill

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jorgen.nielsen(at)mweb.co
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PostPosted: Sat Feb 18, 2006 2:53 pm    Post subject: Help - airspeed sensor Reply with quote

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?

Quote:

<jorgen.nielsen(at)mweb.co.za>

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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czech6(at)kellin.net
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PostPosted: Sat Feb 18, 2006 5:52 pm    Post subject: Help - airspeed sensor Reply with quote

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
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Ernie



Joined: 11 Jan 2006
Posts: 513

PostPosted: Sat Feb 18, 2006 5:58 pm    Post subject: Help - airspeed sensor Reply with quote

Bill,

At your age I'm suprised you can remenber left from right Smile

Ernie

On 2/18/06, Bill <czech6(at)kellin.net> wrote:
[quote]

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
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czech6(at)kellin.net
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PostPosted: Sat Feb 18, 2006 6:02 pm    Post subject: Help - airspeed sensor Reply with quote

I think I still have the stock airspeed indicator someplace in a box. If you
want it I'll send it.
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czech6(at)kellin.net
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PostPosted: Sat Feb 18, 2006 6:20 pm    Post subject: Help - airspeed sensor Reply with quote

I sleep on the left. My wife told me so.

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Ernie



Joined: 11 Jan 2006
Posts: 513

PostPosted: Sat Feb 18, 2006 8:20 pm    Post subject: Help - airspeed sensor Reply with quote

I'll leave it at that then Smile

Ernie

On 2/18/06, Bill <czech6(at)kellin.net> wrote:
[quote]

I sleep on the left. My wife told me so.

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jorgen.nielsen(at)mweb.co
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PostPosted: Sun Feb 19, 2006 10:56 am    Post subject: Help - airspeed sensor Reply with quote

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


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jorgen.nielsen(at)mweb.co
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PostPosted: Sun Feb 19, 2006 11:00 am    Post subject: Help - airspeed sensor Reply with quote

Thanks but I'm OK on that ubless you have the "Special" one.

I have spare original indicator. (but can't use it. Without the right one
with the electrical connection the hydraulics don't work.



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czech6(at)kellin.net
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PostPosted: Sun Feb 19, 2006 5:34 pm    Post subject: Help - airspeed sensor Reply with quote

We have different airspeed indicators. I only have air hoses; no electric.

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roma(at)airmail.net
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PostPosted: Sun Feb 19, 2006 6:03 pm    Post subject: Help - airspeed sensor Reply with quote

the mach meter sends the signal that pulls the flaps on my L-29
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Colyergreg(at)aol.com
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PostPosted: Mon Feb 20, 2006 7:36 am    Post subject: Help - airspeed sensor Reply with quote

Jorgen,
I have the factory mach meter, but I use a F-86 airspeed indicator which
has Knots 50-700 and mach. but it is just static and pitot. the factory
mach meter is attached to the yellow sensor for the flaps up under the left side
of the panel (on the lower inside of the nose wall.)


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jorgen.nielsen(at)mweb.co
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PostPosted: Mon Feb 20, 2006 10:37 am    Post subject: Help - airspeed sensor Reply with quote

Thanks Greg.

Sounds good. My air speed indicator show indicated airspeed, true airspeed
(or equivalent) and mach number.

The electronics side is curious. I do not have the yellow sensor, that is
now all done by the air speed indocator.

Do you have wiring details for yellow box?



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Colyergreg(at)aol.com
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PostPosted: Mon Feb 20, 2006 3:31 pm    Post subject: Help - airspeed sensor Reply with quote

I will look...

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