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pbuttles(at)charter.net
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 Posted: Fri Nov 07, 2008 8:10 pm Post subject: 914 fuel sytem in 701 |
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thought I would post this in the rotax list also and see if anyone has had a simaliar problem.
I have a 701 with a 914 installed.
I have both tanks teed together before the fuel shut off. I have the return installed
in the left tank,I have just gottenit running I put about 3/4 of fuel
inthe left tank and ran the engine. I noticed fuel running out the left wing
and found the tank full!! after a few minutes it came down and leved both tanks
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ptag.dev(at)tiscali.co.uk
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| Posted: Sat Nov 08, 2008 1:24 am Post subject: 914 fuel sytem in 701 |
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Hi! Tracy
It seems to me that your return to the left tank is so quick that it is
overwhelming the pipe to the right tank. So increase the pipe diameter
to the right tank across the "tee"
Regards
Bob Harrison G-PTAG Europa .
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Sat Nov 08, 2008 9:23 am Post subject: 914 fuel sytem in 701 |
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Put a shut off on your right tank... leave it off until your left tank is at least a half a tank down.
Noel
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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Gilles.Thesee(at)ac-greno
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| Posted: Sat Nov 08, 2008 9:33 am Post subject: 914 fuel sytem in 701 |
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Tracy a écrit :
| Quote: |
is ther a better way to get the fuel to level in both tanks quicker?
anybody have the same issues with a 914?
I know ther arent to many out there in a 701.
Teed wing tanks rarely work as expected.
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In our project, the fuel valve switches return lines as well as feed
fuel lines. So the fuel goes back into the tank it came from.
Best regards,
--
Gilles
http://contrails.free.fr
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pbuttles(at)charter.net
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| Posted: Sat Nov 08, 2008 12:00 pm Post subject: 914 fuel sytem in 701 |
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thanks for the info. im thinking which will work best ,being simple to operate and easy to mod in.
I would have to get the right tank out and weld in a fitting and plum more lines to an aircraft already together.
im thinking a colletor tank would be simplest.
Tracy
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gfmjr_20(at)hotmail.com
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| Posted: Sat Nov 08, 2008 1:21 pm Post subject: 914 fuel sytem in 701 |
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Tracy--
Did you put a restriction in the return line? I believe that Rotax indicates that the return line should be restricted to a cross section of 3mm or about 1/16 of an inch. This would slow the fuel movement and keep the fuel level consistent in both tanks.
George May
601XL 912s
| Quote: | Date: Fri C 7 Nov 2008 20:09:48 -0800
From: pbuttles(at)charter.net
To: rotaxengines-list(at)matronics.com
Subject: 914 fuel sytem in 701
--> RotaxEngines-List message posted by: Tracy <pbuttles(at)charter.net>
thought I would post this in the rotax list also and see if anyone has had a simaliar problem.
I have a 701 with a 914 installed.
I have both tanks teed together before the fuel shut off. I have the return installed
in the left tank CI have just gottenit running I put about 3/4 of fuel
inthe left tank and ran the engine. I noticed fuel running out the left wing
and found the tank full!! after a few minutes it came down and leved both tanks
.
I have the stock zenith caps.
any sugestions? or am I going to have to only fill the laft tank half full.
is ther a better way to get the fuel to level in both tanks quicker?
anybody have the same issues with a 914?
I know ther arent to many out there in a 701.
&================
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Gilles.Thesee(at)ac-greno
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| Posted: Sat Nov 08, 2008 3:11 pm Post subject: 914 fuel sytem in 701 |
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george may a écrit :
| Quote: | Tracy--
Did you put a restriction in the return line? I believe that Rotax
indicates that the return line should be restricted to a cross section
of 3mm or about 1/16 of an inch. This would slow the fuel movement
and keep the fuel level consistent in both tanks.
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George and all,
Our 914 Installation Manual specified :
"The fuel reutrn must be a line of *low resistance*. Max tolerated
pressure loss is *0.1 bar* (1.5 psi) between fuel pressure control and
tank inlet with *both* electric fuel pumps in action."
So in my opinion, the fuel return line should NOT be restricted.
The 914 is different from the 912 series.
Best regards,
--
Gilles
http://contrails.free.fr
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K Dilks
Joined: 22 Sep 2008
Posts: 108
Location: UK
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| Posted: Mon Nov 10, 2008 1:10 am Post subject: Re: 914 fuel sytem in 701 |
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Do not reduce the flow in the return line or the fuel pressure regulator will not be able to do its job.
KD
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Back home ................. |
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darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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| Posted: Sun Nov 23, 2008 9:35 am Post subject: Re: 914 fuel sytem in 701 |
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Tracy,
I have a 914 installed on a Kitfox Series 7 and run both tanks to a small 1 gallon header (intermediate tank) tank and plumbed the return line to the top of this tank. I have about 30 hours on this setup and everything is working great and both wing tanks drain at the same rate. Another benefit of the header tank is the elimination of possible air bubbles in the fuel. This would be my recommendation for you.
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Darin Hawkes
Series 7
914 Turbo
Kaysville, Utah |
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