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HomeAircraftHelicopterHelicopter Main Discussion › Mongoose fuel tank
09-02-2017 10:12 AM  14 months agoPost 1


new zealand

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Flew the mongoose today in 20 kts breeze with ease it seams to love a bit of fuel tank is slowerly been sagging in the sides , the tank has vents But it has an odd piping set up there is a vent filler at the top And an overflow out the bottom off the tee fitting , and two pipes into the carb can any of you clairify the tank piping , I have two spare new tanks of the same undrilled , and may change if there is a simpler setup

09-02-2017 03:11 PM  14 months agoPost 2

rrKey Veteran

Kansas City

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From the front of the tank we have the fuel pickup line, it should go to the nipple in the body of the carb. It should not have a T in it.

Working our way back, we have the return line. It goes to the nipple in the carb near the fuel bulb. It has a vent line for the tank teed into it. This line only returns fuel when you pump the bulb. That is why you can use it for a tank vent.

The last line, at the back of the tank, is the tank fill line. I have mine plugged when I am not filling the tank. It can be used as a vent, but because it doesn't have a loop higher than the tank, it can drip fuel out during aggressive flying. It can stain your rear mounted muffler, if you have one.

I think the tanks are just thin and they don't hold their shape well.

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