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Header Tank Venting
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pwmac(at)sisna.com
Guest

Posted: Fri Oct 17, 2008 4:33 pm Post subject: Header Tank Venting

Lots of examples Just do your homework



 Agree. Asymmetrical fuel flow from the tanks has nothing to do with starvation. Fixes for it are not necessary.  Just follow the details on the install and the issue will go away. Nice fat lines are also good and no restrictions in any of the lines are also good. No filter or other components in the header to tank lines helps that situation.

 Paul



 At 09:26 AM 10/17/2008, you wrote:

 [quote]If as you suggest the header tank vent was OFF then in Lowell's example or other similar scenario the automatic refilling of the header tank would be prevented and air/fuel blockages of the two feed lines from the wing tanks WOULD likely slow or prevent flow to the header tank and encourage fuel starvation with adequate fuel remaining in the wings.

  

 Add my name to the many with asymetrical fuel flow from the tanks but no evidence of the header tank being deprived.  I don't have a low fuel warning but there are many out there to monitor the possiblity of starvation.  Were there any warnings that were triggered as a result of the asymetrical draw.  What are the specifics of the "many crashes due to fuel starvation"?  Sounds like urban myth to me.

  

 John Kerr

 Classic IV, 912ul, 780 hours.

 Logan UT

  

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Michael Logan

Joined: 10 Jan 2006
Posts: 82

Posted: Sat Oct 18, 2008 4:57 am Post subject: Header Tank Venting

Also, don't fly with your flaps down for very long.  Even at half full

tanks, you will run out of fuel and the engine will quit.  Don't ask me how

I know.



Mike Logan

Series 5 



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_________________
Mike Logan
Fredericksburg, VA

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sat Oct 18, 2008 5:31 am Post subject: Header Tank Venting

To keep it short...  Follow the plans and vent the header tank!  Forget

about valves and breathers.  Venting to both tanks sounds interesting but

will accomplish nothing except an increase in weight and complexity.

Noel Loveys

AME Intern, RPP

Kitfox III-A

Ivo IFA, Aerocet 1100 floats



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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Sat Oct 18, 2008 5:31 am Post subject: Header Tank Venting

IMHO most fuel starvation will come from blocked cap breathers on the left tank.  

   

   

   

[img]cid:image001.jpg(at)01C93110.EA9152C0[/img]  

   

Noel Loveys  

Campbellton, NL, Canada  

CDN AME intern, PP-Rec  

C-FINB, Kitfox III-A  

Ivo IFA, Aerocet 1100 floats  

[url=noelloveys(at)yahoo.ca]noelloveys(at)yahoo.ca[/url]  

   

   

   

       

From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of paul wilson

 Sent: Friday, October 17, 2008 9:55 PM

 To: kitfox-list(at)matronics.com

 Subject: Re: Re: Header Tank Venting  

  

  

   

Lots of examples Just do your homework

 

 Agree. Asymmetrical fuel flow from the tanks has nothing to do with starvation. Fixes for it are not necessary.  Just follow the details on the install and the issue will go away. Nice fat lines are also good and no restrictions in any of the lines are also good. No filter or other components in the header to tank lines helps that situation.

 Paul

 

 At 09:26 AM 10/17/2008, you wrote:

 

   

If as you suggest the header tank vent was OFF then in Lowell's example or other similar scenario the automatic refilling of the header tank would be prevented and air/fuel blockages of the two feed lines from the wing tanks WOULD likely slow or prevent flow to the header tank and encourage fuel starvation with adequate fuel remaining in the wings.

  

 Add my name to the many with asymetrical fuel flow from the tanks but no evidence of the header tank being deprived.  I don't have a low fuel warning but there are many out there to monitor the possiblity of starvation.  Were there any warnings that were triggered as a result of the asymetrical draw.  What are the specifics of the "many crashes due to fuel starvation"?  Sounds like urban myth to me.

  

 John Kerr

 Classic IV, 912ul, 780 hours.

 Logan UT

  

 ====== UOTE>< /body>    	  Quote: 	
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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

JetPilot

Joined: 10 Jan 2006
Posts: 1246

Posted: Sat Oct 18, 2008 3:47 pm Post subject: Re: Header Tank Venting

Andy Is Correct,



Putting valves and closing the vent on the header tank is just plain dangerous and dumb.  Someone is giving out very bad and dangerous advice.  There are things that this " Bad Advice " person did not take into consideration.   It would take a lot of research and evidence before I would even think about changing the Kitfox design.  EAA has people very well versed in fuel systems, I would at least talk to some real experts before I changed a good and proven design.



Mike

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_________________
"NO FEAR" - If you have no fear you did not go as fast as you could have !!!

Kolb MK-III Xtra, 912-S

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