Thorp Air Command - T18.net

Supporting Owners, Builders and Pilots of the Thorp T-18 and its variants.
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Jeff J
 Post subject: Re: Fuel line routing
PostPosted: Sun Feb 19, 2017 8:37 am 
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Location: eastern OK
Nothing screams "PROBLEM" during preflight like a big puddle on the floor :)

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"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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Bill Williams
 Post subject: Re: Fuel line routing
PostPosted: Sun Feb 19, 2017 10:36 am 
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WE tend to overthink some problems. I have a fuel line that comes from the bottom of the center tank back to just forward of the spar to a fuel select valve, a line from here to the firewall thru fitting, short line to a Piper gascolator, a hard line to the electric pump on the firewall a flex line to the mechanical engine driven pump and finally a hard line to the HA6 carb. I copied the Piper fuel system and been working for 23 years. I have separate fuel pumps that pump fuel from the wings to the main tank via "P" tubes mounted at the top of the tank. As for the shutting off the fuel, I shut the fuel off at Oskosh and Sun n Fun and when using the plane as a glider, the rest of the time its on.


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jrevens
 Post subject: Re: Fuel line routing
PostPosted: Sun Feb 19, 2017 12:24 pm 
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Joined: Thu Oct 22, 2009 10:13 pm
Posts: 679
Location: USA
FWIW, I don't shut mine off either... not for 26 years! :o OK, so I shut it off to test it or for service every so often. I do pull the cowl cheeks & do a post-flight inspection after every flight though... if something's drippin' I'm gonna' see it. Sounds like a fine idea though.

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John Evens
Arvada, Colorado

T-18 N71JE
Kitfox 7 SS N27JE (building)


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Jeff J
 Post subject: Re: Fuel line routing
PostPosted: Sat Feb 25, 2017 11:45 am 
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Location: eastern OK
Here is the cleaned up routing. It could be prettier but there is no place for water or debris to get trapped and it flow checks better than what used to be there. I had to lower the strainer 2 inches to maintain a downhill slope from the tank. It would have been easier to make the connections as I went but, given the limited space, I mounted the components first then tried to make the connections. I couldn't find a routing for hose that wouldn't kink or interfere with the rudder pedals AND maintain the downhill slope. Time will tell if it is a lasting solution.


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"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson
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James Grahn
 Post subject: Re: Fuel line routing
PostPosted: Sun Feb 26, 2017 12:36 am 
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Joined: Sat Oct 24, 2009 7:16 pm
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Simple. I like it. Is that a finger screen?
Cubes


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Jeff J
 Post subject: Re: Fuel line routing
PostPosted: Sun Feb 26, 2017 9:58 am 
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Joined: Wed Aug 31, 2016 8:18 am
Posts: 275
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Location: eastern OK
The brass fitting is the large finger screen Aircraft Spruce sells. It originally had a bushing and the small screen. I gained a badly needed half inch or more by switching screens.

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"The joke in aviation is, 'If you want to make a million, you'd better start with £10m.' " -Bruce Dickinson


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dickwolff
 Post subject: Re: Fuel line routing
PostPosted: Sun Apr 09, 2017 7:38 am 
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Joined: Tue Nov 24, 2009 7:40 pm
Posts: 471
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Location: Canada
Here's a new gascolator product that would solve the problem of tight vertical space in the T18. You could even mount the valve to the top of this thing if you were concerned about mounting it on the bottom of the tank.

https://www.flyboyaccessories.com/product-p/72rr02.htm


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Rich Brazell
 Post subject: Re: Fuel line routing
PostPosted: Sun Apr 09, 2017 9:15 am 
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Joined: Wed Oct 21, 2009 12:33 pm
Posts: 2772
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Location: Jamul, CA (San Diego area)
Does it serve ravioli and garlic bread for that price ? :P

RB O0


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Jeff J
 Post subject: Re: Fuel line routing
PostPosted: Mon Apr 10, 2017 7:49 am 
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Joined: Wed Aug 31, 2016 8:18 am
Posts: 275
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Location: eastern OK
Interesting gascolator. I am not fond of the wire bail style I currently have. I had considered getting one from Steve's Aircraft that the shutoff valve could screw directly into but I was afraid it would not clear the cross tube. Instead I extended the existing gascolator bracket down because it already held the gascolator forward of the cross tube. I nearly clamped the gascolator to the cross tube but came to my senses before I made it permanent. I am thinking I will finish it off with a Saf-Air drain part # CAV-110H4. That particular drain should allow easy access for me to sump check the fuel system. I adapted a piece of 4130 tubing to help get the fuel into the cup until I remember to order one with one of my regular parts orders.

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