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yak inst.

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JOE HOWSE

Joined: 10 Jan 2006
Posts: 140
Location: DUNCAN BC CANADA

Posted: Mon Jun 30, 2008 8:24 am Post subject: yak inst.

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_________________
J.C. HOWSE

kregg(at)balancemyprop.co
Guest

Posted: Mon Jun 30, 2008 2:11 pm Post subject: yak inst.

Sorry,  But I don’t have any  

   

K  

         

  

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Joe Howse

 Sent: Monday, June 30, 2008 9:21 AM

 To: yak-list(at)matronics.com

 Subject: Fw: yak inst.  

  

     

   

    

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dougsappllc(at)gmail.com
Guest

Posted: Mon Jun 30, 2008 3:08 pm Post subject: yak inst.

Joe,

 I have new % tach's and tach gens from AN14 aircraft which carried the M14B engines.  While they are twin engine tachs there is no reason you could not just remove one hand.  Contact me off line if you have an interest.  Hope all is good with you and yours.  Going to Osh?

   

 



 

 On Mon, Jun 30, 2008 at 9:20 AM, Joe Howse <joeh(at)shaw.ca (joeh(at)shaw.ca)> wrote:

 [quote]   

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delfin_driver(at)yahoo.co
Guest

Posted: Tue Jul 01, 2008 6:42 am Post subject: yak inst.

gentlemen

  

 I have a  YAK just got flying and I am having a problem with front cockpit rate of climb indicator.  I am getting no climb or desend indication whatsoever from the guage. Rear panel one works.   I removed the instrument and when blowing/sucking it appears to be free and function correctly.  There are 2 lines to the instrument., I am assuming 1 static line to the system and one line to the rear cockpit, so instructor can take away this guage during practice flights.  How can I be sure I have the 2 hoses connected correctly. They both look alike and there are  no markings to seperate the two??

  

 Any suggestions as to the problem?

 thanks     

 Bob

  [quote] [b]

ronwasson

Joined: 05 Sep 2007
Posts: 30

Posted: Tue Jul 01, 2008 7:15 am Post subject: yak inst.

do not suck on a gauge. The face is painted in radioactive paint that would be very very bad to have long term in your lungs.





On Jul 1, 2008, at 9:38 AM, Robert Schwartz wrote:

 	  Quote: 	
		  



 gentlemen

 

I have a  YAK just got flying and I am having a problem with front cockpit rate of climb indicator.  I am getting no climb or desend indication whatsoever from the guage. Rear panel one works.   I removed the instrument and when blowing/sucking it appears to be free and function correctly.  There are 2 lines to the instrument., I am assuming 1 static line to the system and one line to the rear cockpit, so instructor can take away this guage during practice flights.  How can I be sure I have the 2 hoses connected correctly. They both look alike and there are  no markings to seperate the two??

 

Any suggestions as to the problem?

thanks    

Bob

 	  Quote: 	
		   http://www.matronics.com/Navigator?Yak-List

3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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 [quote][b]

kregg(at)balancemyprop.co
Guest

Posted: Tue Jul 01, 2008 7:22 am Post subject: yak inst.

This one of those times you have a friend do it…………..lol  

         

  

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of ronald wasson

 Sent: Tuesday, July 01, 2008 8:13 AM

 To: yak-list(at)matronics.com

 Subject: Re: Fw: yak inst.  

  

   

do not suck on a gauge. The face is painted in radioactive paint that would be very very bad to have long term in your lungs.    

   

    

   

    

       

On Jul 1, 2008, at 9:38 AM, Robert Schwartz wrote:  

  



 

         



  gentlemen  

    

   

    

I have a  YAK just got flying and I am having a problem with front cockpit rate of climb indicator.  I am getting no climb or desend indication whatsoever from the guage. Rear panel one works.   I removed the instrument and when blowing/sucking it appears to be free and function correctly.  There are 2 lines to the instrument., I am assuming 1 static line to the system and one line to the rear cockpit, so instructor can take away this guage during practice flights.  How can I be sure I have the 2 hoses connected correctly. They both look alike and there are  no markings to seperate the two??  

    

   

    

Any suggestions as to the problem?  

    

thanks      

    

Bob  

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		  http://www.matronics.com/Navigator?Yak-List3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3Dhref="3D"http://forums.matronics.com"">http://forums.matronics.com3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3Dhref="3D"http://www.matronics.com/contribution"">http://www.matronics.com/contribution3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D   http://www.matronics.com/Navigator?Yak-List 	
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        [quote][b]

dougsappllc(at)gmail.com
Guest

Posted: Tue Jul 01, 2008 8:15 am Post subject: yak inst.

Bob,

 The best way to test it is to put it in a large zip lock bag.  Make sure the bag contains quite a bit of air when you seal it.  Then gently squeeze the bag you should see a change.  My guess is that your guage is has a problem, and the reason it works by blowing into it is that you able to exert a lot more force with your blowing and sucking than your static system can.  The two ports are static and pitot. I do carry the CJ6 rate of climbs in stock, and am pretty sure they will function in your aircraft.

   

 Best from here.

  

 



 

 On Tue, Jul 1, 2008 at 7:38 AM, Robert Schwartz <delfin_driver(at)yahoo.com (delfin_driver(at)yahoo.com)> wrote:

  	  Quote: 	
		     

 

 gentlemen

  

 I have a  YAK just got flying and I am having a problem with front cockpit rate of climb indicator.  I am getting no climb or desend indication whatsoever from the guage. Rear panel one works.   I removed the instrument and when blowing/sucking it appears to be free and function correctly.  There are 2 lines to the instrument., I am assuming 1 static line to the system and one line to the rear cockpit, so instructor can take away this guage during practice flights.  How can I be sure I have the 2 hoses connected correctly. They both look alike and there are  no markings to seperate the two??

   

 Any suggestions as to the problem?

 thanks     

 Bob

   	  Quote: 	
		   

	


	


-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644   [quote][b]

wlannon(at)persona.ca
Guest

Posted: Tue Jul 01, 2008 9:03 am Post subject: yak inst.

Don't be blowing and sucking on your  instruments. You can easily overpressure the diaphragms causing distortion and  inaccurate readings. Or worse.

 Doug!!!!!!! - the one using pitot and static  is the A/S indicator. The VSI has only a static input.

  

 Walt  

 [quote]   ---

petervs(at)knology.net
Guest

Posted: Tue Jul 01, 2008 9:48 am Post subject: yak inst.

Disconnect and plug both hoses and connect two other hoses and arrange them to be accessible in the cockpit. One is a vent line for the static leak, the other is the static line itself. Plug one hose and fly the plane. If the gauge works then you know the open line is for the static line and the plugged one is the leak vent which renders the gauge inop. If the gauge is not working, plug the other line and see what happens. The gauge won’t be that accurate without the static line, but it will still do something.  

   

Pete  

       

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Robert Schwartz

 Sent: Tuesday, July 01, 2008 9:39 AM

 To: yak-list(at)matronics.com

 Subject: Re: Fw: yak inst.  

  

  

       



  gentlemen  

    

   

    

I have a  YAK just got flying and I am having a problem with front cockpit rate of climb indicator.  I am getting no climb or desend indication whatsoever from the guage. Rear panel one works.   I removed the instrument and when blowing/sucking it appears to be free and function correctly.  There are 2 lines to the instrument., I am assuming 1 static line to the system and one line to the rear cockpit, so instructor can take away this guage during practice flights.  How can I be sure I have the 2 hoses connected correctly. They both look alike and there are  no markings to seperate the two??  

    

   

    

Any suggestions as to the problem?  

    

thanks       

    

Bob  

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delfin_driver(at)yahoo.co
Guest

Posted: Tue Jul 01, 2008 9:52 am Post subject: yak inst.

The vsi on the Yak 52 has two ports.  Since VSI is a static instrument, I am assuming one of the lines goes to the rear cockkpit (instructor).  But, the lines are not marked. Does anyone kow for sure about these?



 



 ---

dsavarese0812(at)bellsout
Guest

Posted: Tue Jul 01, 2008 10:32 am Post subject: yak inst.

The VSI's in the Yak 52 are different.  And they are  different between the front and rear cockpit, even though the basic part number  DA-30 is similar.  But the front has one more character which I just don't  remember what it is.  Not important except that the front has an  internal capillary tube which is used during instructor disabling that forces  the VSI to zero regardless of vertical speed.  One side of the VSI is  connected to the disabling solenoid.  If you try to bypass the disabling  solenoid, (electrically operated), the VSI in the front cockpit will not  function properly.  Best thing to do is disconnect the electrical  wires from the solenoid so it can't be activated.

  

 If you find a DA-30 from a rear cockpit, you can substitute it  by simply connecting the static line to the instrument.

 Dennis

  

 [quote]   ---

dsavarese0812(at)bellsout
Guest

Posted: Tue Jul 01, 2008 10:33 am Post subject: yak inst.

Nope.  The rear cockpit is connected directly to the  static line.  The front is connected to static AND the disabling  solenoid.  I guess technically one could say the front is connected to the  rear since the static line is common to both.  Although the instruments  look the same, the rear instrument only has one port, whereas the front has 2  ports.  One of which goes to the disabling solenoid.

 Dennis

  

 [quote]   ---

delfin_driver(at)yahoo.co
Guest

Posted: Tue Jul 01, 2008 10:34 am Post subject: yak inst.

Peter

 

thanks for the input. 

 



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delfin_driver(at)yahoo.co
Guest

Posted: Tue Jul 01, 2008 2:37 pm Post subject: yak inst.

thanks everyone for the help. There are 2 ports on the front vsi. Does anyone remember which is for static and which is for the disabling solenoid?    They are labeled 1 and 2         also, any distinguishing ways to know which hose is the static and which goes to the instructor board?



  ---

wlannon(at)persona.ca
Guest

Posted: Tue Jul 01, 2008 3:54 pm Post subject: yak inst.

A quick primer on the VSI -- 

  

 A single static source to the instrument goes to an  internal manifold which in turn connects to the diaphragm via a tube and to the  inside of the case via second MUCH smaller capillary tube.

 It will register climb or descent due to the  differential pressure change inside and outside the diaphragm because of  the flow restricting action of the capillary.

 If one wanted to make a VSI fail to operate you  would put a second fitting into the case connected directly to a valve (manual  or elec.) which in turn connects back to the static source.

 With the valve open the diaphragm and the case  interior will always experience the same static pressure and the instrument will  read zero.

  

 Assuming it reads zero (and not some other  incorrect reading) the most likely problem is a failed override valve. A case,  or line, leak would open it to cockpit pressure which may result in a zero  reading but more likely a variable error. 

  

 Cheers;

 Walt

  

 [quote]   ---

dsavarese0812(at)bellsout
Guest

Posted: Tue Jul 01, 2008 5:20 pm Post subject: yak inst.

Robert,

 Check the one in the rear cockpit.  The static ports are  the same for the front and rear.  Once you figure that out, then the other  port goes to the disabling solenoid.

 Dennis

  

 [quote]   ---

dsavarese0812(at)bellsout
Guest

Posted: Tue Jul 01, 2008 5:33 pm Post subject: yak inst.

Walt,

 You never cease to impress me with your knowledge.  I am  always in awe whenever I read your posts.

 Dennis

  

 [quote]   ---

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