This confuses me as well.
All Ercoupes after the 415-C model have unvented fuel caps. The wing
tanks are "treated as a single tank" insofar as the balancing tube
between them which maintains the same level in each tank, and each wing
tank has a separate "overflow/fuel return/vent line into a tee from the
fuselage tank standpipe which maintains the fuel level in that tank.
All that has changed is that the fuselage tank is no longer present.
I would think "...appropriate plumbing to connect the air spaces in the
two [wing] tanks could be much as Eliacim suggests, i.e. a vent line
from each tank to a tee venting to the outside on the right or left
side of the fuselage at or above the level of the bottom of the
original fuselage tank. Fly the plane with a manometer connected to
such a fitting and angle it forward or backward for neutral or slightly
negative pressure, and Voila! (?)
Regards,
WRB
--
On Aug 17, 2010, at 19:02, <[email protected]> wrote:
John
Maybe I am missing something obvious, but wouldn't simply venting both
tanks connect the air spaces through the atmosphere?
That works for our normal (small) wing tanks. What am I missing here?
Eliacim
--- [email protected] wrote:
As previous owner of the "30 Gallon STC", the reason I didn't put it
into production is because it treats both tanks as a single tank but
does not include the appropriate plumbing to connect the air spaces in
the two tanks.
--
John Cooper
Skyport East
www.skyportservices.net
