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doug kandle
Joined: 09 Jan 2006
Posts: 33
Location: Boise ID
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 Posted: Mon Oct 09, 2006 4:44 pm Post subject: Anyone know about an optical fuel sensor? |
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I have the extra tanks in my 701. The only way to use all of the gas in my tanks is to run one set dry. Since I don't want my starter motor to become a required piece of hardware for continued flight, I need to switch tanks after I have used all the fuel, but before the engine quits. I am plumbing my fuel lines and I wanted something to tell me that my fuel tank has run dry. I figure that the gas in my fuel lines from wing, through gasolator, and to the engine will keep the fan going long enough for me to switch to my outboard tanks.
A friend of mine put an optical sensor in his plane. This is an alert system. (link to aircraft spruce item here http://aircraftspruce.com/catalog/inpages/fuelguardian.php) But this is a complete system, I just want a sensor like this that I can put in my fuel line at the wing root. If I can just get a contact closure then I can use my EIS to annunciate the warning and give me 30 seconds or more to switch tanks.
Does anyone know where I can get such a sensor with just a contact closure?
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Tom
Joined: 20 Sep 2006
Posts: 12
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| Posted: Mon Oct 09, 2006 6:37 pm Post subject: Re: Anyone know about an optical fuel sensor? |
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My impression of what you want to do sounds like very risky fuel management to me. Why don't you calculate your fuel out and leave some fuel, enough that if you had to switch back to it you could run for a half an hour?
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Tom CH801
http://tompizza.webhop.net |
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Mon Oct 09, 2006 7:34 pm Post subject: Anyone know about an optical fuel sensor? |
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Why not "T" in the outboard tanks? Then there would be no connecting,
disconnecting, or fuel spraying around the cockpit.
I'm also thinking that thirty seconds can pass pretty fast especially if
there is any turbulence or a radio call. It could go especially fast if you
are calling downwind leg. The best thing could be to have a small header
tank, maybe a gallon, and put a float sensor on it.
Noel
[quote] --
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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dredmoody(at)cox.net
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| Posted: Tue Oct 10, 2006 6:22 am Post subject: Anyone know about an optical fuel sensor? |
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Aren't the tops of the outboard tanks higher than the internal opening of the vent tube on the inboard tanks because of the dihedral angle? If so, the vent of the inboard tank will jettison fuel until the level in the outboard tank falls below its internal end. It seems to me that the system has to have a valve to isolate the outboard tank from the inboard one.
Ed Moody II
---- Noel Loveys <noelloveys(at)yahoo.ca> wrote:
| Quote: |
Why not "T" in the outboard tanks? Then there would be no connecting,
disconnecting, or fuel spraying around the cockpit.
I'm also thinking that thirty seconds can pass pretty fast especially if
there is any turbulence or a radio call. It could go especially fast if you
are calling downwind leg. The best thing could be to have a small header
tank, maybe a gallon, and put a float sensor on it.
Noel
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| Quote: | > Subject: Anyone know about an optical fuel sensor?
>
>
>
> <d_kandle(at)velocitus.net>
>
> I have the extra tanks in my 701. The only way to use all of
> the gas in my tanks is to run one set dry. Since I don't
> want my starter motor to become a required piece of hardware
> for continued flight, I need to switch tanks after I have
> used all the fuel, but before the engine quits. I am
> plumbing my fuel lines and I wanted something to tell me that
> my fuel tank has run dry. I figure that the gas in my fuel
> lines from wing, through gasolator, and to the engine will
> keep the fan going long enough for me to switch to my outboard tanks.
>
> A friend of mine put an optical sensor in his plane. This is
> an alert system. (link to aircraft spruce item here
> http://aircraftspruce.com/catalog/inpages/fuelguardian.php)
> But this is a complete system, I just want a sensor like this
> that I can put in my fuel line at the wing root. If I can
> just get a contact closure then I can use my EIS to
> annunciate the warning and give me 30 seconds or more to
> switch tanks.
> Does anyone know where I can get such a sensor with just a
> contact closure?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=66837#66837
>
>
>
>
>
>
>
>
>
>
>
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