Show us your Tettra instalations please!
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01-13-2012, 04:49 AM
#3
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RE: Show us your Tettra instalations please!
there really is not much to it. One line for the backpressure and one line for the fuel.....
For the inside of the tetra tank, cut a piece of fuel line that goes about 1/2 way back into the tank, cut a v-notch in the end of the fuel line to help with fuel pick up. About 1" in front of the notch I also cut two small holes in the fuel line (real easy if you put a piece of metal rod in the fuel line).
The trick is to make sure you use that little metal piece under the part you screw to tighten it up, and to use a Japenese Screwdriver to get it tight. The original instructions said to tighten till the two pieces are within an 1/8" apart, I try to get them to touch and use loc-tite on the nut and bolt. You do not want these tanks to leak, especially with a Q40 motor.
For the inside of the tetra tank, cut a piece of fuel line that goes about 1/2 way back into the tank, cut a v-notch in the end of the fuel line to help with fuel pick up. About 1" in front of the notch I also cut two small holes in the fuel line (real easy if you put a piece of metal rod in the fuel line).
The trick is to make sure you use that little metal piece under the part you screw to tighten it up, and to use a Japenese Screwdriver to get it tight. The original instructions said to tighten till the two pieces are within an 1/8" apart, I try to get them to touch and use loc-tite on the nut and bolt. You do not want these tanks to leak, especially with a Q40 motor.
01-13-2012, 05:58 AM
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RE: Show us your Tettra instalations please!
What kind of pictures would you like? I use the 4oz Tetra tanks for 424 & the 5.25oz Tetra tanks for 426 in my quickies. They sit in front of my throttle servo and go to the leading edge of the main wing, in my aircraft design. I keep the tank as close to the CG as I can so that the weight doesn't shift much during flight.
Let me know what you want pictures of, and I will take them for you.
Let me know what you want pictures of, and I will take them for you.
01-13-2012, 08:37 AM
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RE: Show us your Tettra instalations please!
Hi!
Like this!
The third and fourth picture shows a third line, a green one (overflow). That line is not necessary to use! You can see in the second picture (Nelson LS ) that only two lines are necessary. One line goes to carb...the other line goes to pressure (silencer)!
Like this!
The third and fourth picture shows a third line, a green one (overflow). That line is not necessary to use! You can see in the second picture (Nelson LS ) that only two lines are necessary. One line goes to carb...the other line goes to pressure (silencer)!
01-13-2012, 01:21 PM
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RE: Show us your Tettra instalations please!
First cut the end of the pickup fuel line a couple of time so it will suck up all the fuel. I use two different color fuel tubes. Use a piece of carbon fiber rod or popsicles stick to keep fuel tank back over CG. See pictures.
01-13-2012, 03:01 PM
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RE: Show us your Tettra instalations please!
OK, some pictures from me! 
Top view of the 4oz Tetra tank in front of the throttle servo mount.
Looking thru former F2 where the fuel line run to the front.
The outside showing the blue fuel line (with shut off) and the pink muffler pressure line.
Fuel lines to the Jett 426 and a Tetra 6oz & 4oz. for comparison.
The 5.25oz tank goes thru F2 slightly, so I use a piece of strapping tape on the bottom & top side stuck to each other to be able to pull it out if needed.
Hope this helps you some,
Top view of the 4oz Tetra tank in front of the throttle servo mount.
Looking thru former F2 where the fuel line run to the front.
The outside showing the blue fuel line (with shut off) and the pink muffler pressure line.
Fuel lines to the Jett 426 and a Tetra 6oz & 4oz. for comparison.
The 5.25oz tank goes thru F2 slightly, so I use a piece of strapping tape on the bottom & top side stuck to each other to be able to pull it out if needed.
Hope this helps you some,
01-24-2012, 07:56 PM
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RE: Show us your Tettra instalations please!
ORIGINAL: Ed Smith
Jett tank right on the balance point.
Ed S
Jett tank right on the balance point.
Ed S
01-25-2012, 08:22 AM
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RE: Show us your Tettra instalations please!
Believe it or not there was simple logic to the "Backwards Tank" installation.
Space inside a Q40 fuselage is at a premium. With the usual forward facing tank the feed line follows a torturous route from the tank through the firewall, some sort of curling around through the pinch and then to the engine. There is also the Shutoff wire from the servo to the engine compartment.
With the "Backwards" tank all that nonsense is dispensed with. The feed line goes from the tank straight to the pinch by the side of the tank and then a straight line to the engine.
What could be simpler? Try it you will like it.
S dE
Space inside a Q40 fuselage is at a premium. With the usual forward facing tank the feed line follows a torturous route from the tank through the firewall, some sort of curling around through the pinch and then to the engine. There is also the Shutoff wire from the servo to the engine compartment.
With the "Backwards" tank all that nonsense is dispensed with. The feed line goes from the tank straight to the pinch by the side of the tank and then a straight line to the engine.
What could be simpler? Try it you will like it.
S dE
