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heat scat tube and fuel valve

 
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rvdave



Joined: 24 Jan 2009
Posts: 191
PostPosted: Fri Jan 29, 2010 11:02 pm    Post subject: heat scat tube and fuel valve Reply with quote
Apparently there are differences in the quick build kits regarding fuel valve bracket height and scat tube traveling past the valve. If the scat tube is suppose to go above the valve there is not enough room for mine. Is the scat tube suppose to go under the fuel valve or does the bracket need to be moved down? What are others doing?

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Dave Ford
Cadillac, MI
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Bob Turner



Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
PostPosted: Fri Jan 29, 2010 11:11 pm    Post subject: Re: heat scat tube and fuel valve Reply with quote
If you have an earlier version (fuselage sent before about March 2008) the valve is relatively high, and does not have an extension shaft. Kits and QB's sent after that time have the fuel valve mounted lower, rotated 180 degrees, and have an extension shaft. In either case, the heat SCAT goes above the valve. For the earlier kits it is necessary to squash the scat somewhat to fit thru. Some have made fiberglass tubes to channel the air thru this area. I think one of the reasons for moving the valve lower was to allow more room for the scat. (Other reasons are to avoid the cross over in tubing, and to allow for a positive detent in the various positions.)

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Bob Turner
RV-10 QB
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johngoodman



Joined: 18 Sep 2006
Posts: 530
Location: GA
PostPosted: Sat Jan 30, 2010 6:35 am    Post subject: Re: heat scat tube and fuel valve Reply with quote
I mentally struggled with that for a long time. Then I bought an Andair, placed it a little more forward, used Bonaco steel braided hoses, and there was plenty of room.
John

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rvdave



Joined: 24 Jan 2009
Posts: 191
PostPosted: Sat Jan 30, 2010 7:43 am    Post subject: Re: heat scat tube and fuel valve Reply with quote
I can fit the scat tubing under the valve and between the fuel lines, I've got to believe others have done that with earlier kits, could or would there be a condition for vapor lock, is that the issue?

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Dave Ford
Cadillac, MI
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Tim Olson



Joined: 25 Jan 2007
Posts: 2879
PostPosted: Sat Jan 30, 2010 8:31 am    Post subject: heat scat tube and fuel valve Reply with quote
Yes, keep that line away from fuel lines. That SCAT
tube gets hot enough that the seat frame around it
gets hot enough to burn your skin if you touch it.
If you use rear seat heat, you will definitely have
hot metal in the area. I have insulated my SCAT
tubing further to prevent that heat from getting
out anywhere but the exit vent as much as possible.
There is a LOT of heat there.
Tim Olson - RV-10 N104CD

rvdave wrote:
Quote:


I can fit the scat tubing under the valve and between the fuel lines, I've got to believe others have done that with earlier kits, could or would there be a condition for vapor lock, is that the issue?

--------
Dave Ford
RV6 flying
RV10 building
Cadillac, MI




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http://forums.matronics.com/viewtopic.php?p 84041#284041




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rvdave



Joined: 24 Jan 2009
Posts: 191
PostPosted: Sat Jan 30, 2010 4:32 pm    Post subject: Re: heat scat tube and fuel valve Reply with quote
Thanks Tim, what did you do with your scat tube and fuel valve since you had an earlier kit?

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Dave Ford
Cadillac, MI
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Tim Olson



Joined: 25 Jan 2007
Posts: 2879
PostPosted: Sat Jan 30, 2010 5:11 pm    Post subject: heat scat tube and fuel valve Reply with quote
I used a lowered and extended Andair....the most common fix.
Tim

On Jan 30, 2010, at 6:32 PM, "rvdave" <davidbf(at)centurytel.net> wrote:

Quote:


Thanks Tim, what did you do with your scat tube and fuel valve since
you had an earlier kit?

--------
Dave Ford
RV6 flying
RV10 building
Cadillac, MI


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 84101#284101



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