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Help - airspeed sensor

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czech6(at)kellin.net
Guest

Posted: Sun Feb 12, 2006 9:19 am Post subject: Help - airspeed sensor

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
Guest

Posted: Sat Feb 18, 2006 2:53 pm Post subject: Help - airspeed sensor

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).

czech6(at)kellin.net
Guest

Posted: Sat Feb 18, 2006 5:52 pm Post subject: Help - airspeed sensor

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

---

Ernie

Joined: 11 Jan 2006
Posts: 513

Posted: Sat Feb 18, 2006 5:58 pm Post subject: Help - airspeed sensor

Bill,



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



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

 ---

czech6(at)kellin.net
Guest

Posted: Sat Feb 18, 2006 6:02 pm Post subject: Help - airspeed sensor

I think I still have the stock airspeed indicator someplace in a box. If you 

want it I'll send it.

---

czech6(at)kellin.net
Guest

Posted: Sat Feb 18, 2006 6:20 pm Post subject: Help - airspeed sensor

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



---

Ernie

Joined: 11 Jan 2006
Posts: 513

Posted: Sat Feb 18, 2006 8:20 pm Post subject: Help - airspeed sensor

I'll leave it at that then 



Ernie



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

[quote] 



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



 ---

jorgen.nielsen(at)mweb.co
Guest

Posted: Sun Feb 19, 2006 10:56 am Post subject: Help - airspeed sensor

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
Guest

Posted: Sun Feb 19, 2006 11:00 am Post subject: Help - airspeed sensor

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.



 



--

czech6(at)kellin.net
Guest

Posted: Sun Feb 19, 2006 5:34 pm Post subject: Help - airspeed sensor

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

roma(at)airmail.net
Guest

Posted: Sun Feb 19, 2006 6:03 pm Post subject: Help - airspeed sensor

the mach meter sends the signal that pulls the flaps on my L-29

---

Colyergreg(at)aol.com
Guest

Posted: Mon Feb 20, 2006 7:36 am Post subject: Help - airspeed sensor

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.)

jorgen.nielsen(at)mweb.co
Guest

Posted: Mon Feb 20, 2006 10:37 am Post subject: Help - airspeed sensor

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?



   



--

Colyergreg(at)aol.com
Guest

Posted: Mon Feb 20, 2006 3:31 pm Post subject: Help - airspeed sensor

I will look...

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