Black Horce Model BH39, Instruction Manual Book

Page: 30 / 32

SPITFIRE.
INSTRUCTION MANUAL.
30
Accurately mark the balance point on the top
of the wing on both sides of the fuselage. The
balance point is located
115mm back from the
leading edge. This is the balance point at which
your model should balance for your first flights.
Later, you may wish to experiment by shifting
the balance up to 10mm forward or back to
change the flying characteristics. Moving the
balance forward may improve the
smoothness and arrow- like tracking, but it may
then require more speed for take off and make
it more difficult to slow down for landing.
Moving the balance aft makes the model more
agile with a lighter and snappier ”feel”. In any
case, please start at the location we
recommend .
See picture wing attach to fuselage.
Wing bolt.
Wing bolt.

   3. Turn the airplane upside down. Place
your fingers on the masking tape and carefully
lift the plane .

   1) It is critical that your airplane be bal-
anced correctly. Improper balance will cause
your plane to lose control and crash.
THE CENTER OF GRAVITY IS LOCATED
115mm BACK FROM THE LEADING EDGE
OF THE WING.

   2) Mount the wing to the fuselage. Using a
couple of pieces of masking tape, place them
on the top side of the wing
115mm back from
the leading edge, at the fuselage sides.
BALANCING.