Richard,

Gap seals are important.  I am now flying competition control-line stunt and
all the hot dogs tape up the flap and elevator hinge lines.  The results are
impressive and it is easy to see the flying deterioration when a hinge line
starts to leak.  These model planes fly at between 48 and 60 mph. Care to
guess the change magnitude at 100 to 290 mph?? .

Bob Smiley