Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Stall warning

Matronics Email Lists Forum Index -> Yak-List

View previous topic :: View next topic

Author Message

christopherjober(at)gmail
Guest

Posted: Fri Apr 10, 2015 9:45 am Post subject: Stall warning

I have had intermittent issues with my stall warning. Have had looked at by a mechanic and he is baffled. He checked at the wiring thinking it was a short being that it was intermittent. As if now its not working at all. Has anyone has a similar issue? 



Chris Ober



Sent from my iPhone

jblake207(at)comcast.net
Guest

Posted: Fri Apr 10, 2015 10:09 am Post subject: Stall warning

What type airplane Chris?



 



   From: "Chris Ober" <christopherjober(at)gmail.com>

To: yak-list(at)matronics.com

Sent: Friday, April 10, 2015 12:43:46 PM

Subject: Stall warning

 



--> Yak-List message posted by: Chris Ober <christopherjober(at)gmail.com>

 



I have had intermittent issues with my stall warning. Have had looked at by a mechanic and he is baffled. He checked at the wiring thinking it was a short being that it was intermittent. As if now its not working at all. Has anyone has a similar issue? 

 



Chris Ober

 



Sent from my iPhone

 ;                    -Mat===============

 

 

 

 [quote][b]

christopherjober(at)gmail
Guest

Posted: Sat Apr 11, 2015 4:57 am Post subject: Stall warning

I have had intermittent issues with my stall warning on my Yak-52. Have had looked at by a mechanic and he is baffled. He checked at the wiring thinking it was a short being that it was intermittent. As if now its not working at all. Has anyone had a similar issue? 



Chris Ober



Sent from my iPhone



Chris Ober



Sent from my iPhone

dabear

Joined: 21 Jan 2011
Posts: 92
Location: Warrenton, VA

Posted: Sat Apr 11, 2015 8:01 am Post subject: Stall warning

Is the switch in the "official" mode?  If I remember it can be turned off.



Bear



--

Rob Rowe

Joined: 10 Jan 2006
Posts: 124
Location: Berkshire, UK

Posted: Sat Apr 11, 2015 8:05 am Post subject: Re: Stall warning

Chris, 

So what were your stall warning intermittent issues ... which combination of red stall light / yellow low speed / audio tone triggered unexpectedly? 

Is your stall sensor heater still working?

Rob R

christopherjober(at)gmail
Guest

Posted: Sun Apr 12, 2015 6:16 am Post subject: Stall warning

With the switches on nothing works. It was intermittently working now nothing. No lights no tones. When pushing the test button, nothing. 



Chris Ober



Sent from my iPhone



On Apr 11, 2015, at 7:52 AM, Chris Ober <christopherjober(at)gmail.com> wrote:



I have had intermittent issues with my stall warning on my Yak-52. Have had looked at by a mechanic and he is baffled. He checked at the wiring thinking it was a short being that it was intermittent. As if now its not working at all. Has anyone had a similar issue? 



Chris Ober



Sent from my iPhone



Chris Ober



Sent from my iPhone

Rob Rowe

Joined: 10 Jan 2006
Posts: 124
Location: Berkshire, UK

Posted: Sun Apr 12, 2015 8:11 am Post subject: Re: Stall warning

Chris, 

I'd start off first by checking whether the stall warning breaker has tripped, I believe these are reset by cycling and doesn't physically move the switch toggle if tripped. So it may appear 'on', but may have tripped if the wiring or device has shorted. Check voltage on both sides of breaker to check for downstream short. 

If no voltage feed to breaker then check same on upstream 10A dedicated fuse in DC fuse box, if this has blown then do not replace until you find out why it blew. Fuses & breakers are there to protect your wiring not the kit - wiring is going to be the most expensive (& potentially lethal) thing in the aircraft to replace if you cook it ... and the bundle that surrounds it! 

If all of the above voltages look good then start checking for bad earths, although from your description this is less likely to cause the intermittent issue you originally had. 

Once you've identified whether a power short/bad connection is in play, then comes the challenge of sourcing it to wiring or faulty kit. The latter is going to a PITA given I've never found a schematic of what goes on inside the stall warning box, in theory it shouldn't be that complex but there are way too many connections for something that should be 'simple'! 

Rob R

bwade154(at)yahoo.com
Guest

Posted: Sun Apr 12, 2015 2:06 pm Post subject: Stall warning

Chris on my Yak the stall warning was never hooked up here or in Russia, I believe the wires are disconnected on the left side panel in the area of your left ass cheek, but when talking to one Russian he said that the warning worked upright and inverted which might be giving your mechanic a head scratcher. As I enjoy flying my Yak acrobatically I think the bussing in my ear would get old quick, just my two cents.

Bill Wade

N4450Y

  

      From: Rob Rowe <yak-list(at)robrowe.plus.com>

 To: yak-list(at)matronics.com 

 Sent: Sunday, April 12, 2015 12:11 PM

 Subject: Re: Stall warning

  

 

--> Yak-List message posted by: "Rob Rowe" <yak-list(at)robrowe.plus.com (yak-list(at)robrowe.plus.com)>



Chris, 

I'd start off first by checking whether the stall warning breaker has tripped, I believe these are reset by cycling and doesn't physically move the switch toggle if tripped. So it may appear 'on', but may have tripped if the wiring or device has shorted. Check voltage on both sides of breaker to check for downstream short. 

If no voltage feed to breaker then check same on upstream 10A dedicated fuse in DC fuse box, if this has blown then do not replace until you find out why it blew. Fuses & breakers are there to protect your wiring not the kit - wiring is going to be the most expensive (& potentially lethal) thing in the aircraft to replace if you cook it ... and the bundle that surrounds it! 

If all of the above voltages look good then start checking for bad earths, although from your description this is less likely to cause the intermittent issue you originally had. 

Once you've identified whether a power short/bad connection is in play, then comes the challenge of sourcing it to wiring or faulty kit. The latter is going to a PITA given I've never found a schematic of what goes on inside the stall warning box, in theory it shouldn't be that complex but there are way too many connections for something that should be 'simple'! 

Rob R





Read this topic online here:



http://forums.matronics.com/v//www.matronics.com/Navigator?Yak-List" target="_blank">http://www.matronsp;  -->

Dawg

Joined: 19 May 2013
Posts: 355

Posted: Sun Apr 12, 2015 3:01 pm Post subject: Stall warning

Just don't stall.



Sent from my iPad



 	  Quote: 	
		   On Apr 13, 2015, at 01:11, Rob Rowe <yak-list(at)robrowe.plus.com> wrote:

 

 

 

 Chris, 

 I'd start off first by checking whether the stall warning breaker has tripped, I believe these are reset by cycling and doesn't physically move the switch toggle if tripped. So it may appear 'on', but may have tripped if the wiring or device has shorted. Check voltage on both sides of breaker to check for downstream short. 

 If no voltage feed to breaker then check same on upstream 10A dedicated fuse in DC fuse box, if this has blown then do not replace until you find out why it blew. Fuses & breakers are there to protect your wiring not the kit - wiring is going to be the most expensive (& potentially lethal) thing in the aircraft to replace if you cook it ... and the bundle that surrounds it! 

 If all of the above voltages look good then start checking for bad earths, although from your description this is less likely to cause the intermittent issue you originally had. 

 Once you've identified whether a power short/bad connection is in play, then comes the challenge of sourcing it to wiring or faulty kit. The latter is going to a PITA given I've never found a schematic of what goes on inside the stall warning box, in theory it shouldn't be that complex but there are way too many connections for something that should be 'simple'! 

 Rob R

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=440708#440708

_________________
Dawg

christopherjober(at)gmail
Guest

Posted: Sun Apr 12, 2015 3:55 pm Post subject: Stall warning

That's been my solution. It would be nice if I could use if I so desired. 



Chris Ober



Sent from my iPhone



On Apr 12, 2015, at 6:01 PM, Bill Geipel <l129bs(at)gmail.com> wrote:






Just don't stall.



Sent from my iPad



 	  Quote: 	
		   On Apr 13, 2015, at 01:11, Rob Rowe <yak-list(at)robrowe.plus.com> wrote:

 

 

 

 Chris, 

 I'd start off first by checking whether the stall warning breaker has tripped, I believe these are reset by cycling and doesn't physically move the switch toggle if tripped. So it may appear 'on', but may have tripped if the wiring or device has shorted. Check voltage on both sides of breaker to check for downstream short. 

 If no voltage feed to breaker then check same on upstream 10A dedicated fuse in DC fuse box, if this has blown then do not replace until you find out why it blew. Fuses & breakers are there to protect your wiring not the kit - wiring is going to be the most expensive (& potentially lethal) thing in the aircraft to replace if you cook it ... and the bundle that surrounds it! 

 If all of the above voltages look good then start checking for bad earths, although from your description this is less likely to cause the intermittent issue you originally had. 

 Once you've identified whether a power short/bad connection is in play, then comes the challenge of sourcing it to wiring or faulty kit. The latter is going to a PITA given I've never found a schematic of what goes on inside the stall warning box, in theory it shouldn't be that complex but there are way too many connections for something that should be 'simple'! 

 Rob R

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=440708#440708

Dawg

Joined: 19 May 2013
Posts: 355

Posted: Sun Apr 12, 2015 4:20 pm Post subject: Stall warning

I have a customized, built in stall warning system. As I approach L/D max it shakes, a lot. I don't even know what L/D max means but it sounds cool. So I pull until it shakes, a lot, (enough to scare me) then stop pulling. With the stall horn blowing (beeping) I can't hear the radio. And that means I can't hear the tower tell me my gear is up. So when the tower says my gear is up, I know I am stalling. It's my customized stall warning back up system.

I can send you the drawings.

Sent from my iPad



 	  Quote: 	
		   On Apr 13, 2015, at 08:54, Chris Ober <christopherjober(at)gmail.com> wrote:

 

 

 

 That's been my solution. It would be nice if I could use if I so desired. 

 

 Chris Ober

 

 Sent from my iPhone

 

 On Apr 12, 2015, at 6:01 PM, Bill Geipel <l129bs(at)gmail.com> wrote:

 

 

 

 Just don't stall.

 

 Sent from my iPad

 

> On Apr 13, 2015, at 01:11, Rob Rowe <yak-list(at)robrowe.plus.com> wrote:

> 

> 

> 

> Chris, 

> I'd start off first by checking whether the stall warning breaker has tripped, I believe these are reset by cycling and doesn't physically move the switch toggle if tripped. So it may appear 'on', but may have tripped if the wiring or device has shorted. Check voltage on both sides of breaker to check for downstream short. 

> If no voltage feed to breaker then check same on upstream 10A dedicated fuse in DC fuse box, if this has blown then do not replace until you find out why it blew. Fuses & breakers are there to protect your wiring not the kit - wiring is going to be the most expensive (& potentially lethal) thing in the aircraft to replace if you cook it ... and the bundle that surrounds it! 

> If all of the above voltages look good then start checking for bad earths, although from your description this is less likely to cause the intermittent issue you originally had. 

> Once you've identified whether a power short/bad connection is in play, then comes the challenge of sourcing it to wiring or faulty kit. The latter is going to a PITA given I've never found a schematic of what goes on inside the stall warning box, in theory it shouldn't be that complex but there are way too many connections for something that should be 'simple'! 

> Rob R

> 

> 

> 

> 

> Read this topic online here:

> 

> http://forums.matronics.com/viewtopic.php?p=440708#440708

_________________
Dawg

Display posts from previous:

	Matronics Email Lists Forum Index -> Yak-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum