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A bit of help.

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dougsappllc(at)gmail.com
Guest

Posted: Fri Oct 14, 2016 12:35 pm Post subject: A bit of help.

Guys,I'm a ways away from my CJ today and need a measurement if anyone has a CJ near by.  We are working on a improved sump drain for the belly sump tank.  I need to know how much space is available to extend the sump drain down before it hits the domed inspection cover.  A measurement from the 3 sided flat plate to the cover would be perfect.

thanks in advance.

Doug

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Ernie

Joined: 11 Jan 2006
Posts: 513

Posted: Fri Oct 14, 2016 12:42 pm Post subject: A bit of help.

Are you referring to the Fuel header tank? 



On Friday, October 14, 2016, doug sapp <dougsappllc(at)gmail.com (dougsappllc(at)gmail.com)> wrote:

 	  Quote: 	
		  Guys,I'm a ways away from my CJ today and need a measurement if anyone has a CJ near by.  We are working on a improved sump drain for the belly sump tank.  I need to know how much space is available to extend the sump drain down before it hits the domed inspection cover.  A measurement from the 3 sided flat plate to the cover would be perfect.

thanks in advance.

Doug

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Clouddog

Joined: 02 Jun 2016
Posts: 119
Location: Lebanon, TN

Posted: Fri Oct 14, 2016 12:51 pm Post subject: A bit of help.

Doug mine shows 9/16 

Greg Wrobel 

On Oct 14, 2016 3:39 PM, "doug sapp" <dougsappllc(at)gmail.com (dougsappllc(at)gmail.com)> wrote: 	  Quote: 	
		  Guys,I'm a ways away from my CJ today and need a measurement if anyone has a CJ near by.  We are working on a improved sump drain for the belly sump tank.  I need to know how much space is available to extend the sump drain down before it hits the domed inspection cover.  A measurement from the 3 sided flat plate to the cover would be perfect.

thanks in advance.

Doug

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wlannon(at)shaw.ca
Guest

Posted: Fri Oct 14, 2016 6:27 pm Post subject: A bit of help.

Doug;

  

 Will try to remember to check mine tomorrow.

 Something to consider in the process is the fact that the cover and dome  move upward with positive pressure in flight.

  

 Walt

    

  From: doug sapp (dougsappllc(at)gmail.com) 

 Sent: Friday, October 14, 2016 1:34 PM

 To: yak-list(at)matronics.com (yak-list(at)matronics.com) 

 Subject: A bit of help.

  



  Guys,  I'm a ways away from my CJ today and need a measurement if anyone has a CJ  near by.  We are working on a improved sump drain for the belly sump  tank.  I need to know how much space is available to extend the sump drain  down before it hits the domed inspection cover.  A measurement from the 3  sided flat plate to the cover would be perfect.

  

 thanks in advance.

  

 Doug

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wlannon(at)shaw.ca
Guest

Posted: Mon Oct 17, 2016 10:41 am Post subject: A bit of help.

Doug;

  

 Took some measurements the other day.  There are three surfaces one  could use to define the dome location:--  I assume you are referring to  largest 

 surface of the plate itself rather than either surface of the attached  nut.

 If so that dimension is 1.99”.

  

 Not easy to measure so would include a tolerance of +/- 0.030”.

  

 Good idea to design a drainable sump rather than a simple drain (as I have  done) that in fact eliminates the actual sump.   The rationale I used  here was

 that a simple drain would be better than a sump drain that would likely go  unused due to the need for tools to access it.

 Possibly not one of my best decisions but based on the premise that water  drainage should only done be after a substantial settling period.

  

 The upward movement of the dome due to positive in flight pressure I  mentioned earlier is a concern only if that movement can contact and activate  the 

 drain valve.   I would suggest a minimum clearance of about  0.25”

  

 Cheers;

 Walt

    

  From: doug sapp (dougsappllc(at)gmail.com) 

 Sent: Friday, October 14, 2016 1:34 PM

 To: yak-list(at)matronics.com (yak-list(at)matronics.com) 

 Subject: A bit of help.

  



  Guys,  I'm a ways away from my CJ today and need a measurement if anyone has a CJ  near by.  We are working on a improved sump drain for the belly sump  tank.  I need to know how much space is available to extend the sump drain  down before it hits the domed inspection cover.  A measurement from the 3  sided flat plate to the cover would be perfect.

  

 thanks in advance.

  

 Doug

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threein60

Joined: 04 Feb 2016
Posts: 51
Location: Everett Wa

Posted: Tue Jan 03, 2017 1:03 pm Post subject: Re: A bit of help.

I added a quick drain sump and drilled a hole through the dome so the drain sticks out about 1/2 inch.  This way any fuel will leak outside and it's easy to access for a quick drain.

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Adrian Coop Cooper

Joined: 02 Feb 2010
Posts: 37
Location: Vancouver, BC

Posted: Tue Jan 03, 2017 7:07 pm Post subject: Re: A bit of help.

Walt put a low profile drain in my sump when he did his valve improvement.

I drilled a hole in the dome just big enough to get the fuel tester in and it 

has worked very well. It is so easy to test the fuel and I don't have to worry about the high pressure. Coop.

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Coop

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