Replies to This Discussion

Permalink Reply by Vance Simons on December 4, 2015 at 10:42pm

6.2 gallons an hour??? Holy Molly! I though the EA 81 would do much better than that.

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Permalink Reply by Normand Lambert on December 4, 2015 at 11:52pm

Hi Vance,
It would do better IF I leaned sometime and I did not run it at 90% throttle all the time..
This engine can take it without problem and hold 100% throttle at all time ... I just like to get somewhere faster....

I would say around 5 gals an hour is more conservative if you run at 75% throttle like you should....
Regards,
Norm

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Permalink Reply by François Balaux on December 7, 2015 at 4:46pm

Salut

Zenair's drawings numbers for this are 7-WTO-1 and 7-WTO-2. They do not connect the tanks together, they use one gascolator for the inboard tank and one for the others, with a three way valve instead of the original one between the gascolators and the engine.

If you connect them together I do not think you need a check valve, as long as you do coordinated turns the fuel will not go to the lower wing. In the standard 2X10 gal setup the tanks are connected together and there is no such problem.

If I remember correctly in Canada you need one fuel gage for each tank, you may want to confirm that if you do the modification.

Regards,

François

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Permalink Reply by Normand Lambert on December 15, 2015 at 7:14am

Hi Francois,

Merci pour les infos. I dont have these pages... Newer plan set I guess... I would rather connect them together in the wing without having to get 2 more fuel lines out to a new valve.

Thanks,

Norm

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Permalink Reply by Bob Jones on December 15, 2015 at 1:30pm

Normand, I have the old style 5.5 gal. tanks from zenith l as outboard aux. tanks, mine are plumbed with a gas tank switching valve [dual tank pick-up style] between the two tanks, and hooked up thru the normally closed port only , I plugged the normally open port, the main tank has a "T" fitting that allows fuel from the outboard to flow into the main or thru to the engine , you only have to energize the valve when the main is half tank or less , since the outboard tank is higher and closer to the spar it flows down and aft. also you dont need gages since the main will read apx 1/2 tank until the aux. is empty , you also dont need complex fuel valves, just right /left /both and two toggle switches...   BOB

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Permalink Reply by Jeff badgero on January 1, 2016 at 8:14am

Be careful! Extra fuel extra weight. This will limit passenger. Capacity. Just caution to add to check list I learned the hard way. Fly safe.

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Permalink Reply by Darryl Legg on January 1, 2016 at 11:24pm

Hi Normand,

I only have a 601XL but the process should be the same. I added extra tanks in the wings and connected them up with a pump with an internal check valve. I use the original tanks as "main" tanks and just top them up from the "aux" tank. I only have an extra switch for each pump in the cockpit. Works a treat.

Cheers

Darryl

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