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HomeAircraftHelicopterHIROBOHirobo Freya › Freya fuel tank question
06-06-2009 01:58 PM  9 years agoPost 1
Bouchah

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Willow Spring, N. Carolina USA

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Im building a pre Evo Freya, non pumped, with 600cc fuel tank, OS HZ .91. Just wanted to make sure I get the rubber plug with the metal tubes through it right. What is the second metal tube for? The nipple off the tank is the muffler pressure, the first metal tube is for fuel to engine, in the manual the 2nd metal tube says lubrication.

Another question, Ive read where some cut the clunk line to different lengths, the manual shows 80, for both original fuel tank & the 600cc tank. Should the line be a little longer for the larger tank?

Thanks again for the help.

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06-06-2009 02:39 PM  9 years agoPost 2
Paul_Barsamian

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Glenview (North Suburban Chicago)

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Clunk line should be per manual, but I usually just check to make sure it can't get caught or stopped at the back edge of the tank.

Second line is usually capped off, some put a second clunk and use to fill if you don't run a header, I'm guessing some have used it for uni flow, but frankly I've had 3 Freyas and never done anything but cap it off.

Son, before you can soar with the eagles you have to learn to sh** with the chickens

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06-06-2009 03:03 PM  9 years agoPost 3
Bouchah

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Willow Spring, N. Carolina USA

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If I use a header, which I am, I would still just cap it off. Thanks.

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06-06-2009 04:26 PM  9 years agoPost 4
payne1967

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uk

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others use the extra pipe for the fuel return on the pumped c spec
as youve got a non pumped engine just cap it off

as for the clunk line make sure its free to move and not get stuck any where inside the tank

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06-07-2009 01:42 AM  9 years agoPost 5
tadawson

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Lewisville, TX

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On a YS setup, the second line works great for the pressure line, and then use the top "tit" to vent. On non-YS, cap the second line, as others have said . . .

- Tim

Friends don't let friends become electrotarded . . . .

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06-07-2009 01:57 AM  9 years agoPost 6
Alpine

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Lexington, Ky

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I capped the second line and pressured the tit .I hope that is OK

Roberto Munoz
IRCHA #344

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06-07-2009 02:18 AM  9 years agoPost 7
tadawson

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Lewisville, TX

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That's typical for a non-YS setup - you should be fine.

- Tim

Friends don't let friends become electrotarded . . . .

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06-07-2009 03:46 AM  9 years agoPost 8
Alpine

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Lexington, Ky

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Tim, I meant with the YS ....

Roberto Munoz
IRCHA #344

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06-07-2009 07:14 AM  9 years agoPost 9
tadawson

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Lewisville, TX

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That will work, but I prefer to not use a tee to release pressure, so myself, I return the check valve to the second line on the cap, and use the tit to vent the tank at the end of the flight, and run nothing more than a couple of inches of tubing to a plug on that line.

As long as you can fuel, vent, and return pressure to the tank, there isn't really any wrong way to run the tank lines, short of connecting the engine fuel line to the tit . . .

- Tim

Friends don't let friends become electrotarded . . . .

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