In article ,
(Jay) writes:


For a low wing aircraft with dual wing tanks, what is the point of
having a fuel selector valve. It seems to be a source of some fuel
exhaustion caused accidents. Wouldn't it just be easier to feed off
both simultaniously?



In theory, Yes it would be easier to feed off both simultaniously but the
reality is that it wouldn't happen that way. It will always pull from the tank
giving the least resistance and, when that tank ran out of fuel, it would
continue to try and pull from it until you contacted the ground. The only way
to guarantee a fairly equal use from both wings is to switch the lead from the
tanks on a regular basis.

In addition, the balanced use of fuel from each tank will help keep the plane
from having a heavy wing.
Bob Reed
www.kisbuild.r-a-reed-assoc.com (KIS Builders Site)
KIS Cruiser in progress...Slow but steady progress....

"Ladies and Gentlemen, take my advice,
pull down your pants and Slide on the Ice!"
(M.A.S.H. Sidney Freedman)