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Still looking for a snot valve - help

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yakflyr

Joined: 10 Mar 2009
Posts: 24

Posted: Thu May 21, 2009 9:42 am Post subject: Still looking for a snot valve - help

Hi,



I have finally secured almost everything I need to add a compressor to my Yak55M, but I am missing one more item - a snot valve.  It seems this little item is difficult to get.  Any lines on where I can get a snot valve would be greatly appreciated.

 

Thanks in advance,



Anthony.



BTW, thanks for all of the advice in finding the sheer coupling and gauge, this list made it happen.

  [quote][b]

jlpartington(at)att.net
Guest

Posted: Thu May 21, 2009 10:10 am Post subject: Still looking for a snot valve - help

dsavarese0812(at)bellsout
Guest

Posted: Thu May 21, 2009 10:39 am Post subject: Still looking for a snot valve - help

Doug Sapp should have the snot valve that's used on the  CJ.  It's almost identical to the 52.  Except that the in/out male  fittings are a different size than on the 52 snot valve.  But that  shouldn't make a difference to you since you're building a new system.  I'm  sure Doug has the female B-Nut fittings to mate with the snot valve.  Doug  can also make you a high pressure flexible line from the compressor output check  valve banjo fitting to the snot valve.  Ask him about that.

 Dennis

  

 [quote]   ---

scott-p(at)texas.net
Guest

Posted: Fri May 22, 2009 3:25 am Post subject: Still looking for a snot valve - help

Hi Anthony,



Since the volume of the bottle (and the whole system, in fact) on the 55 

is so low, many do not have separate snot valves. Mine for example only 

has the valve on the bottom of the tank. I dutifully open it slightly 

and drain out the gunk about once a week or so (and you don't need to 

completely drain the system, though until you get used to doing it 

quickly, be prepared to refill the air system), and at each annual I use 

that valve to drain the entire system. It is also the lowest point in 

the system, so that's where the gunk ends up.



Scott



Yak 55M wrote:

 	  Quote: 	
		   Hi,



 I have finally secured almost everything I need to add a compressor to 

 my Yak55M, but I am missing one more item - a snot valve.  It seems 

 this little item is difficult to get.  Any lines on where I can get a 

 snot valve would be greatly appreciated.



 Thanks in advance,



 Anthony.



 BTW, thanks for all of the advice in finding the sheer coupling and 

 gauge, this list made it happen.

 *

 *

dougsappllc(at)gmail.com
Guest

Posted: Fri May 22, 2009 8:41 am Post subject: Still looking for a snot valve - help

As always your mileage may vary but the thought of a rusted or corroded air bottle exploding in a aircraft really chills my crap!, in my mind it is simply is not worth the chance.   Add to this the fact that your pushing all the moisture and gunk into your expensive start valve and check valves which is just not a good deal even if you have replaced all the springs with stainless steel.  IMHO the added cost of a snot valve AND a dessicant filter will save you a bunch of money and trouble down the road.   



Always Yakin,

Doug



On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)> wrote:

  	  Quote: 	
		  --> Yak-List message posted by: Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)>

  

 Hi Anthony,

 

 Since the volume of the bottle (and the whole system, in fact) on the 55 is so low, many do not have separate snot valves. Mine for example only has the valve on the bottom of the tank. I dutifully open it slightly and drain out the gunk about once a week or so (and you don't need to completely drain the system, though until you get used to doing it quickly, be prepared to refill the air system), and at each annual I use that valve to drain the entire system. It is also the lowest point in the system, so that's where the gunk ends up.

  

 Scott



 

 Yak 55M wrote:

  	  Quote: 	
		   Hi,

 

 I have finally secured almost everything I need to add a compressor to my Yak55M, but I am missing one more item - a snot valve.  It seems this little item is difficult to get.  Any lines on where I can get a snot valve would be greatly appreciated.

  

 Thanks in advance,

 

 Anthony.

 

 BTW, thanks for all of the advice in finding the sheer coupling and gauge, this list made it happen.

 *

 

 

 *

 	
 

 ===========

 rget="_blank">http://www.matronics.com/Navigator?Yak-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 



	


-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

 

  [quote][b]

drc(at)wscare.com
Guest

Posted: Fri May 22, 2009 8:42 am Post subject: Still looking for a snot valve - help

Exact same for me, the low point drain for the bottom of the air tank  

is mounted just on the Left of the oil cooler doghouse.  Although it  

would be nice to have a separate valve to relaesa without dumping the  

air.

Herb

On May 22, 2009, at 6:23 AM, Scott Poehlmann wrote:



 	  Quote: 	
		   



 Hi Anthony,



 Since the volume of the bottle (and the whole system, in fact) on  

 the 55 is so low, many do not have separate snot valves. Mine for  

 example only has the valve on the bottom of the tank. I dutifully  

 open it slightly and drain out the gunk about once a week or so (and  

 you don't need to completely drain the system, though until you get  

 used to doing it quickly, be prepared to refill the air system), and  

 at each annual I use that valve to drain the entire system. It is  

 also the lowest point in the system, so that's where the gunk ends up.



 Scott



 Yak 55M wrote:

> Hi,

>

> I have finally secured almost everything I need to add a compressor  

> to my Yak55M, but I am missing one more item - a snot valve.  It  

> seems this little item is difficult to get.  Any lines on where I  

> can get a snot valve would be greatly appreciated.

>

> Thanks in advance,

>

> Anthony.

>

> BTW, thanks for all of the advice in finding the sheer coupling and  

> gauge, this list made it happen.

> *

> *

drc(at)wscare.com
Guest

Posted: Fri May 22, 2009 10:12 am Post subject: Still looking for a snot valve - help

Doug,If you are familiar with the yak 55 system (maybe they are all unique as they are each a retrofit), please describe the plumbing  to add the snot valve.

Has any body thought of adding a valve like the Wilga.  My Yak 52 TW has the pull handle is in the cockpit to release the valve.  On the Wilga it was up front behind the right cowl cheek - a screw type valve that released right there.  Which of these types is more like the CJ or standard Yak?

I would think the Wilga type would be the easiest to plumb for the 55 since the whole air system is in front of the firewall except the fill port and guage.

 

Thanks,

Herb



On May 22, 2009, at 11:29 AM, doug sapp wrote:

[quote]As always your mileage may vary but the thought of a rusted or corroded air bottle exploding in a aircraft really chills my crap!, in my mind it is simply is not worth the chance.   Add to this the fact that your pushing all the moisture and gunk into your expensive start valve and check valves which is just not a good deal even if you have replaced all the springs with stainless steel.  IMHO the added cost of a snot valve AND a dessicant filter will save you a bunch of money and trouble down the road.   



Always Yakin,

Doug



On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)> wrote:

  	  Quote: 	
		  --> Yak-List message posted by: Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)>

 

 Hi Anthony,

 

 Since the volume of the bottle (and the whole system, in fact) on the 55 is so low, many do not have separate snot valves. Mine for example only has the valve on the bottom of the tank. I dutifully open it slightly and drain out the gunk about once a week or so (and you don't need to completely drain the system, though until you get used to doing it quickly, be prepared to refill the air system), and at each annual I use that valve to drain the entire system. It is also the lowest point in the system, so that's where the gunk ends up.

  

 Scott



 

 Yak 55M wrote:

  	  Quote: 	
		   Hi,

 

 I have finally secured almost everything I need to add a compressor to my Yak55M, but I am missing one more item - a snot valve.  It seems this little item is difficult to get.  Any lines on where I can get a snot valve would be greatly appreciated.

 

 Thanks in advance,

 

 Anthony.

 

 BTW, thanks for all of the advice in finding the sheer coupling and gauge, this list made it happen.

 *

 

 

 *

 	
 

 ===========

 rget="_blank">http://www.matronics.com/Navigator?Yak-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 



	


-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

 

  	  Quote: 	
		  



href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	
[b]

dougsappllc(at)gmail.com
Guest

Posted: Fri May 22, 2009 12:34 pm Post subject: Still looking for a snot valve - help

Herb,Am really not sure of the plumbing on the 55 or the 52 for that matter.  From your description the Wilga snot valve sounds like the one used on a CJ wherein you reach inside the cowl and turn the knob/wheel and depending on which way the wind is blowing it blows crap all over your right leg or foot.  To add a snot valve to any system is not difficult and I have the valves and most if not all the fitting here in my stock.  Give me a call if I can be of help. 509-826-4610

 



I will be at Red Star 24th--the 1st.

Always Yakin,

Doug 

On Fri, May 22, 2009 at 11:09 AM, Herb Coussons <drc(at)wscare.com (drc(at)wscare.com)> wrote:

  	  Quote: 	
		  Doug,If you are familiar with the yak 55 system (maybe they are all unique as they are each a retrofit), please describe the plumbing  to add the snot valve.

 Has any body thought of adding a valve like the Wilga.  My Yak 52 TW has the pull handle is in the cockpit to release the valve.  On the Wilga it was up front behind the right cowl cheek - a screw type valve that released right there.  Which of these types is more like the CJ or standard Yak?

 



I would think the Wilga type would be the easiest to plumb for the 55 since the whole air system is in front of the firewall except the fill port and guage.

 

Thanks,

 



Herb



On May 22, 2009, at 11:29 AM, doug sapp wrote:

 	  Quote: 	
		  As always your mileage may vary but the thought of a rusted or corroded air bottle exploding in a aircraft really chills my crap!, in my mind it is simply is not worth the chance.   Add to this the fact that your pushing all the moisture and gunk into your expensive start valve and check valves which is just not a good deal even if you have replaced all the springs with stainless steel.  IMHO the added cost of a snot valve AND a dessicant filter will save you a bunch of money and trouble down the road.    



Always Yakin,



Doug



On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)> wrote:

  

 	  Quote: 	
		  --> Yak-List message posted by: Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)>

  

 Hi Anthony,

 

 Since the volume of the bottle (and the whole system, in fact) on the 55 is so low, many do not have separate snot valves. Mine for example only has the valve on the bottom of the tank. I dutifully open it slightly and drain out the gunk about once a week or so (and you don't need to completely drain the system, though until you get used to doing it quickly, be prepared to refill the air system), and at each annual I use that valve to drain the entire system. It is also the lowest point in the system, so that's where the gunk ends up.

   

 Scott

 

 Yak 55M wrote:

  	  Quote: 	
		   Hi,

  

 I have finally secured almost everything I need to add a compressor to my Yak55M, but I am missing one more item - a snot valve.  It seems this little item is difficult to get.  Any lines on where I can get a snot valve would be greatly appreciated.

  

 Thanks in advance,

 

 Anthony.

 

 BTW, thanks for all of the advice in finding the sheer coupling and gauge, this list made it happen.

 *

 

 

 *

 	
 



 ===========

 rget="_blank">http://www.matronics.com/Navigator?Yak-List

  ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

  ===========

 

 

 

 



	


-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

 



  	  Quote: 	
		  href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	
	


 ==== et="_blank">http://www.matronics.com/Navigator?Yak-List a>http://forums.matronics.com _blank">http://www.matronics.com/contribution  [/b] 	




[/quote]

-- 

Always Yakin,

Doug Sapp

Phone 509-826-4610

Fax 509-826-3644

 

  [quote][b]

scott-p(at)texas.net
Guest

Posted: Fri May 22, 2009 4:37 pm Post subject: Still looking for a snot valve - help

Hi Dennis,



I agree with your concern, but the system in a most 55's is different 

than that in the 52 (or even the 50). First off, I (and most others) 

have an overboard dump line--99% of the time the compressor is pumping 

air overboard and NOT through the system, thus most of the time the 

system is sealed. I dutifully check for "snot" but essentially NEVER get 

anything out. Second, the system ONLY operates the starter--thus the 

lines are short and relatively straight--in fact my entire air system is 

on the engine side of the firewall except for the line to the cockpit 

pressure guage. Third, I at least have my tank visually inspected every 

other annual or so, so I know it isn't corroded (as a gynecologist, I 

find it fascinating that the exact same instrument I call a "diagnostic 

hysteroscope" and which costs over $15,000 can be had by an A&P for < 

$500 when it is called a "flexible boroscope"... but that's another 

discussion...). Given these things, I don't think that using the tank 

bottom drain valve as the snot valve is unreasonable--adding such a 

valve would just give me another point from which the system could leak. 

But the concern about corrosion is very real--just one look at the 52 

from England that had the bottle explode is enough to convince me!



Best,



Scott



doug sapp wrote:

 	  Quote: 	
		   As always your mileage may vary but the thought of a rusted or 

 corroded air bottle exploding in a aircraft really chills my crap!, in 

 my mind it is simply is not worth the chance.   Add to this the fact 

 that your pushing all the moisture and gunk into your expensive start 

 valve and check valves which is just not a good deal even if you have 

 replaced all the springs with stainless steel.  IMHO the added cost of 

 a snot valve AND a dessicant filter will save you a bunch of money and 

 trouble down the road.  



 Always Yakin,

 Doug



 On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net 

 <mailto:scott-p(at)texas.net>> wrote:



     

     <mailto:scott-p(at)texas.net>>



     Hi Anthony,



     Since the volume of the bottle (and the whole system, in fact) on

     the 55 is so low, many do not have separate snot valves. Mine for

     example only has the valve on the bottom of the tank. I dutifully

     open it slightly and drain out the gunk about once a week or so

     (and you don't need to completely drain the system, though until

     you get used to doing it quickly, be prepared to refill the air

     system), and at each annual I use that valve to drain the entire

     system. It is also the lowest point in the system, so that's where

     the gunk ends up.



     Scott

     Yak 55M wrote:



         Hi,



         I have finally secured almost everything I need to add a

         compressor to my Yak55M, but I am missing one more item - a

         snot valve.  It seems this little item is difficult to get.

          Any lines on where I can get a snot valve would be greatly

         appreciated.



         Thanks in advance,



         Anthony.



         BTW, thanks for all of the advice in finding the sheer

         coupling and gauge, this list made it happen.

         *

         *

     ===========

     rget="_blank">http://www.matronics.com/Navigator?Yak-List

     ===========

     http://forums.matronics.com

     ===========

     le, List Admin.

     ="_blank">http://www.matronics.com/contribution

     ===========

 -- 

 Always Yakin,

 Doug Sapp

 Phone 509-826-4610

 Fax 509-826-3644

 *

 *

drc(at)wscare.com
Guest

Posted: Fri May 22, 2009 6:40 pm Post subject: Still looking for a snot valve - help

Are you kidding - a gynecologist?

Me too!  And I actually have used a flexible hysteroscope on an  

airplane.

I have the same experience with the 55, I get hardly any return when I  

use the valve connected to the bottom of the tank.  Whereas the CJ  

description that Doug gave, turning the knob behind the cowl on the  

Wilga dumped the biggest mess you can imagine.



Herb Coussons

On May 22, 2009, at 7:35 PM, Scott Poehlmann wrote:



 	  Quote: 	
		   



 Hi Dennis,



 I agree with your concern, but the system in a most 55's is  

 different than that in the 52 (or even the 50). First off, I (and  

 most others) have an overboard dump line--99% of the time the  

 compressor is pumping air overboard and NOT through the system, thus  

 most of the time the system is sealed. I dutifully check for "snot"  

 but essentially NEVER get anything out. Second, the system ONLY  

 operates the starter--thus the lines are short and relatively  

 straight--in fact my entire air system is on the engine side of the  

 firewall except for the line to the cockpit pressure guage. Third, I  

 at least have my tank visually inspected every other annual or so,  

 so I know it isn't corroded (as a gynecologist, I find it  

 fascinating that the exact same instrument I call a "diagnostic  

 hysteroscope" and which costs over $15,000 can be had by an A&P for  

 < $500 when it is called a "flexible boroscope"... but that's  

 another discussion...). Given these things, I don't think that using  

 the tank bottom drain valve as the snot valve is unreasonable-- 

 adding such a valve would just give me another point from which the  

 system could leak. But the concern about corrosion is very real-- 

 just one look at the 52 from England that had the bottle explode is  

 enough to convince me!



 Best,



 Scott



 doug sapp wrote:

> As always your mileage may vary but the thought of a rusted or  

> corroded air bottle exploding in a aircraft really chills my crap!,  

> in my mind it is simply is not worth the chance.   Add to this the  

> fact that your pushing all the moisture and gunk into your  

> expensive start valve and check valves which is just not a good  

> deal even if you have replaced all the springs with stainless  

> steel.  IMHO the added cost of a snot valve AND a dessicant filter  

> will save you a bunch of money and trouble down the road.

> Always Yakin,

> Doug

>

> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net  

> <mailto:scott-p(at)texas.net>> wrote:

>

>    

>    <mailto:scott-p(at)texas.net>>

>

>    Hi Anthony,

>

>    Since the volume of the bottle (and the whole system, in fact) on

>    the 55 is so low, many do not have separate snot valves. Mine for

>    example only has the valve on the bottom of the tank. I dutifully

>    open it slightly and drain out the gunk about once a week or so

>    (and you don't need to completely drain the system, though until

>    you get used to doing it quickly, be prepared to refill the air

>    system), and at each annual I use that valve to drain the entire

>    system. It is also the lowest point in the system, so that's where

>    the gunk ends up.

>

>    Scott

>    Yak 55M wrote:

>

>        Hi,

>

>        I have finally secured almost everything I need to add a

>        compressor to my Yak55M, but I am missing one more item - a

>        snot valve.  It seems this little item is difficult to get.

>         Any lines on where I can get a snot valve would be greatly

>        appreciated.

>

>        Thanks in advance,

>

>        Anthony.

>

>        BTW, thanks for all of the advice in finding the sheer

>        coupling and gauge, this list made it happen.

>        *

>        *

>    ===========

>    rget="_blank">http://www.matronics.com/Navigator?Yak-List

>    ===========

>    http://forums.matronics.com

>    ===========

>    le, List Admin.

>    ="_blank">http://www.matronics.com/contribution

>    ===========

> -- 

> Always Yakin,

> Doug Sapp

> Phone 509-826-4610

> Fax 509-826-3644

> *

> *

scott-p(at)texas.net
Guest

Posted: Sat May 23, 2009 3:34 am Post subject: Still looking for a snot valve - help

Hi Herb,



Yup, Assistant Professor of Obstetrics and Gynecology, Texas Tech 

University Paul L. Foster School of Medicine (what a mouthful). Says so 

right here on my name tag, so it must be true... I'm really more of a 

Urogyn than a regular gyn--but I guess that makes my interest in the 

plumbing of these planes make even more sense...<VBG>



I can imagine the mess--I've seen what comes out of the snot valves in 52s.



So how long did you have to Cidex the 'scope after you used it?...!



Scott



Herb Coussons wrote:

 	  Quote: 	
		   



 Are you kidding - a gynecologist?

 Me too!  And I actually have used a flexible hysteroscope on an airplane.

 I have the same experience with the 55, I get hardly any return when I 

 use the valve connected to the bottom of the tank.  Whereas the CJ 

 description that Doug gave, turning the knob behind the cowl on the 

 Wilga dumped the biggest mess you can imagine.



 Herb Coussons

 On May 22, 2009, at 7:35 PM, Scott Poehlmann wrote:



> 

>

> Hi Dennis,

>

> I agree with your concern, but the system in a most 55's is different 

> than that in the 52 (or even the 50). First off, I (and most others) 

> have an overboard dump line--99% of the time the compressor is 

> pumping air overboard and NOT through the system, thus most of the 

> time the system is sealed. I dutifully check for "snot" but 

> essentially NEVER get anything out. Second, the system ONLY operates 

> the starter--thus the lines are short and relatively straight--in 

> fact my entire air system is on the engine side of the firewall 

> except for the line to the cockpit pressure guage. Third, I at least 

> have my tank visually inspected every other annual or so, so I know 

> it isn't corroded (as a gynecologist, I find it fascinating that the 

> exact same instrument I call a "diagnostic hysteroscope" and which 

> costs over $15,000 can be had by an A&P for < $500 when it is called 

> a "flexible boroscope"... but that's another discussion...). Given 

> these things, I don't think that using the tank bottom drain valve as 

> the snot valve is unreasonable--adding such a valve would just give 

> me another point from which the system could leak. But the concern 

> about corrosion is very real--just one look at the 52 from England 

> that had the bottle explode is enough to convince me!

>

> Best,

>

> Scott

>

> doug sapp wrote:

>> As always your mileage may vary but the thought of a rusted or 

>> corroded air bottle exploding in a aircraft really chills my crap!, 

>> in my mind it is simply is not worth the chance.   Add to this the 

>> fact that your pushing all the moisture and gunk into your expensive 

>> start valve and check valves which is just not a good deal even if 

>> you have replaced all the springs with stainless steel.  IMHO the 

>> added cost of a snot valve AND a dessicant filter will save you a 

>> bunch of money and trouble down the road.

>> Always Yakin,

>> Doug

>>

>> On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net 

>> <mailto:scott-p(at)texas.net>> wrote:

>>

>>    

>>    <mailto:scott-p(at)texas.net>>

>>

>>    Hi Anthony,

>>

>>    Since the volume of the bottle (and the whole system, in fact) on

>>    the 55 is so low, many do not have separate snot valves. Mine for

>>    example only has the valve on the bottom of the tank. I dutifully

>>    open it slightly and drain out the gunk about once a week or so

>>    (and you don't need to completely drain the system, though until

>>    you get used to doing it quickly, be prepared to refill the air

>>    system), and at each annual I use that valve to drain the entire

>>    system. It is also the lowest point in the system, so that's where

>>    the gunk ends up.

>>

>>    Scott

>>

>>

>>    Yak 55M wrote:

>>

>>        Hi,

>>

>>        I have finally secured almost everything I need to add a

>>        compressor to my Yak55M, but I am missing one more item - a

>>        snot valve.  It seems this little item is difficult to get.

>>         Any lines on where I can get a snot valve would be greatly

>>        appreciated.

>>

>>        Thanks in advance,

>>

>>        Anthony.

>>

>>        BTW, thanks for all of the advice in finding the sheer

>>        coupling and gauge, this list made it happen.

>>        *

>>

>>

>>        *

>>

>>

>>    ===========

>>    rget="_blank">http://www.matronics.com/Navigator?Yak-List

>>    ===========

>>    http://forums.matronics.com

>>    ===========

>>    le, List Admin.

>>    ="_blank">http://www.matronics.com/contribution

>>    ===========

>>

>>

>>

>>

>>

>>

>> -- 

>> Always Yakin,

>> Doug Sapp

>> Phone 509-826-4610

>> Fax 509-826-3644

>> *

>>

>>

>> *

>

>

yakplt(at)yahoo.com
Guest

Posted: Sun May 24, 2009 4:13 pm Post subject: Still looking for a snot valve - help

I'd buy what ever snot valve you can get from anyone (Doug Sapp) and just plumb it in.  

  

 Failing that, just what is a snot valve anyway?  How hard would be it be to just make one? 

  

 Mark Bitterlich

 

 

 

   From: Scott Poehlmann <scott-p(at)texas.net>

To: yak-list(at)matronics.com

Sent: Friday, May 22, 2009 8:35:25 PM

Subject: Re: Still looking for a snot valve - help



--> Yak-List message posted by: Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)>



Hi Dennis,



I agree with your concern, but the system in a most 55's is different than that in the 52 (or even the 50). First off, I (and most others) have an overboard dump line--99% of the time the compressor is pumping air overboard and NOT through the system, thus most of the time the system is sealed. I dutifully check for "snot" but essentially NEVER get anything out. Second, the system ONLY operates the  starter--thus the lines are short and relatively straight--in fact my entire air system is on the engine side of the firewall except for the line to the cockpit pressure guage. Third, I at least have my tank visually inspected every other annual or so, so I know it isn't corroded (as a gynecologist, I find it fascinating that the exact same instrument I call a "diagnostic hysteroscope" and which costs over $15,000 can be had by an A&P for < $500 when it is called a "flexible boroscope"... but that's another discussion...). Given these things, I don't think that using the tank bottom drain valve as the snot valve is unreasonable--adding such a valve would just give me another point from which the system could leak. But the concern about corrosion is very real--just one look at the 52 from England that had the bottle explode is enough to convince me!



Best,



Scott



doug sapp wrote:

 	  Quote: 	
		   As always your mileage may vary but the  thought of a rusted or corroded air bottle exploding in a aircraft really chills my crap!, in my mind it is simply is not worth the chance.  Add to this the fact that your pushing all the moisture and gunk into your expensive start valve and check valves which is just not a good deal even if you have replaced all the springs with stainless steel.  IMHO the added cost of a snot valve AND a dessicant filter will save you a bunch of money and trouble down the road.  

 Always Yakin,

 Doug

 

 On Fri, May 22, 2009 at 4:23 AM, Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net) <mailto:scott-p(at)texas.net (scott-p(at)texas.net)>> wrote:

 

    --> Yak-List message posted by: Scott Poehlmann <scott-p(at)texas.net (scott-p(at)texas.net)

    <mailto:scott-p(at)texas.net (scott-p(at)texas.net)>>

 

    Hi Anthony,

 

    Since the volume of the bottle (and the whole system, in fact) on

    the 55 is so low, many do not have separate snot valves. Mine for

    example only has the valve on the bottom of the tank. I dutifully

    open it slightly and drain out the gunk about once a week or so

    (and you don't need to completely drain the system, though until

    you get used to doing it quickly, be prepared to refill the air

    system), and at each annual I use that valve to drain the entire

    system. It is also the lowest point in the system, so that's where

    the gunk ends  up.

 

    Scott

 

 

    Yak 55M wrote:

 

        Hi,

 

        I have finally secured almost everything I need to add a

        compressor to my Yak55M, but I am missing one more item - a

        snot valve.  It seems this little item is difficult to get.

          Any lines on where I can get a snot valve would be greatly

        appreciated.

 

        Thanks in advance,

 

        Anthony.

 

        BTW, thanks for all of the advice in finding the sheer

        coupling and gauge, this list made it happen.

        *

 

 

         *

 

 

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 -- Always Yakin,

 Doug Sapp

 Phone 509-826-4610

 Fax 509-826-3644

 *

 

 

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