zsmith3rd(at)earthlink.ne
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 Posted: Mon Oct 08, 2007 4:56 am Post subject: 701 fuel capacity |
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do not archive
Kevin,
To add some clarification to the fuel tank arrangement on the 701:
As I know it, the original 701 had a "cowl" tank.
This was later changed to a "D-tank" located in the same place but with reduced capacity...
the tank was some smaller to accomodate items installed in the instrument panel.
With the 912 engine installed there just wasn't sufficient fuel, so wing tanks were offered as an option.
A bit later the D-tank was dropped, no pun intended, and wing tanks were standard.
My kit, number 4433, was supplied with BOTH, as well as instructions for installing a Rotax 582.
The 912 instructions were an addendum.
Even the D-tank didn't allow much room for instruments which extended very far behind the panel.
Also, since the D-tank was below the level of the wing tanks, the Flight Engineer was responsible for fuel managenment.....open a valve, let some run into the D-tank, close valve before fuel ran out the D-tank vent. (Some apparently were installed with the vent running up to the same level as the top of the wing tank so as to prevent overflow).
Anyway, as I know the story to the present, the D-tank is history, and fuel line plumbing is simplified; one tee and a shutoff valve is the shortest route to the engine.
After considerable "measuring & looking" I did not install the D-tank. Twenty gallons total in the wing tanks seems to equate to one bladder-full when one is planning pit stops.
With the 912 you would have about four hours or more.
Hope this helps.
Regards,
Zed
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