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AFP Purge Valve Safety Spring

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chasb(at)satx.rr.com
Guest

Posted: Wed Feb 07, 2007 9:45 am Post subject: AFP Purge Valve Safety Spring

Interesting discussion on purge valves. No problems with my AFP Purge  

Valve and it came with all the screws already safety wired.



  I worry about the valve cutoff arm inadvertently closing during  

flight resulting in an engine  shut down. I've connected the arm to  

the cockpit with a Bowden cable which locks in "Run" position.  

However, I worry what would happen if the cable breaks or comes loose  

at the control arm. The solution seems to be a spring that would hold  

the arm to the "Run" position.



Has anybody installed such a safety spring and how did you arrange it?



Charlie Brame

RV-6A N11CB

San Antonio

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recapen(at)earthlink.net
Guest

Posted: Wed Feb 07, 2007 10:00 am Post subject: AFP Purge Valve Safety Spring

I saw a photo of one on someone's - forgot who's...IIRC the purge valve was mounted vertically.



They described the spring just as you have .....



Now I need to find it too - and check my safety wire.....



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Terry Watson

Joined: 09 Jan 2006
Posts: 290
Location: Seattle, WA USA

Posted: Wed Feb 07, 2007 10:38 am Post subject: AFP Purge Valve Safety Spring

Charlie,



I ran a spring from where the control wire connects to the arm on the purge

valve to the baffle for the same reason you cite. It seems to work fine, but

I haven't started the engine yet.



Terry

RV-8A

Seattle

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phil(at)petrasoft.net
Guest

Posted: Wed Feb 07, 2007 11:46 am Post subject: AFP Purge Valve Safety Spring

This is how I did mine.  100+ hours and all is well.



http://www.myrv7.com/viewimage.php?pictureid=503



Godspeed,



Phil Birkelbach - Houston Texas

RV-7 N727WB

http://www.myrv7.com



Charles Brame wrote:

 	  Quote: 	
		   



 Interesting discussion on purge valves. No problems with my AFP Purge 

 Valve and it came with all the screws already safety wired.



  I worry about the valve cutoff arm inadvertently closing during 

 flight resulting in an engine  shut down. I've connected the arm to 

 the cockpit with a Bowden cable which locks in "Run" position. 

 However, I worry what would happen if the cable breaks or comes loose 

 at the control arm. The solution seems to be a spring that would hold 

 the arm to the "Run" position.



 Has anybody installed such a safety spring and how did you arrange it?



 Charlie Brame

 RV-6A N11CB

 San Antonio

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kahuna

Joined: 02 Feb 2007
Posts: 93

Posted: Wed Feb 07, 2007 12:48 pm Post subject: AFP Purge Valve Safety Spring

Hey Phil,

Am I wrong or is your spring pulling to ICO. Trying to picture how mine

is positioned. When I pull my cable it goes to ico. Push arm away from

cockpit is run. Not sure but that's how I remember it. Mine WAS mounted

similarly to yours.

Just going from vague memory here.

Mike

Do not archive



 



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rv9jim(at)juno.com
Guest

Posted: Wed Feb 07, 2007 1:15 pm Post subject: AFP Purge Valve Safety Spring

Mike,

        Mine is the same direction and the spring is correct.  It is

pulling to the "run" position.  You have to pull against the spring to

get it to the ICO position.  I will be putting a spring on also.  "JIC". 

  I'm using Van's standard  pull bowden cable like the one provided for

the cabin heat select--



Jim Nelson

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