Great Planes ESP6 Easy Sport 60 - GPMA0152 - Manual (Page 50)

Reinstall the engine, muffler, propeller, spinner, battery,
receiver, servos, control horns, pushrods and main
landing gear.
Install the three 2-1/2" wheels (not included) (3" on the
Easy Sport 60) using two 5/32" wheel collars (not
included) (3/16" wheel collars on the Easy Sport 60) for
the nose wheel and four 3/16" wheel collars (not
included) for the mains On the Easy Sport 40, the wheel
hubs on the main landing wheels may need to be drilled
out with a 13/64" drill to allow them to spin freely Grind
or file a flat spot at the point of set screw contact for
each of the outer collars This provides a better area for
the set screw to bite and helps keep the wheels in place.
NOTE: This section is VERY important and must
NOT be omitted! A model that is not properly
balanced will be unstable and possibly unflyable.
2 On the Easy Sport 60, locate the servo tray at the
position shown on the plans On both the Easy Sport 40
and 60, attach the wing to the fuselage With an empty
fuel tank, hold the model at the marked balance point
with the stabilizer level
3 Lift the model If the tail drops when you lift, the model
is "tail heavy" and you must add weight to the nose If
the nose drops, it is "nose heavy" and you must add
weight to the tail to balance On the Easy Sport 60 the
servo tray can be positioned forward or aft along with
moving the receiver battery and receiver to balance
the model.
Note Nose weight may be easily installed by using a
Great Planes Spinner Weight or gluing lead weights to
the firewall Tail weight may be added by using Great
Planes (GPMQ4485) "stick-on lead weights Later if the
balance proves to be OK, you can open the fuse bottom
and glue these in permanently
On the Easy Sport 40, first attempt to balance the
model by changing the position of the receiver battery
and receiver If you are unable to obtain good balance
by doing so, then it will be necessary to add weight to
the nose or tail to achieve the proper balance point.
NOTE: For more accurate balancing you may build a
simple balancing stand using 1/4" dowels and a 1/4"
plywood base, as shown in the sketch
1. Accurately mark the balance point on the bottom of the
wing on both sides of the fuselage The balance point is
located 4-1/8" back from the leading edge (4-3/4" back
from the leading edge on the Easy Sport 60) 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 3/8" forward or back to change the flying
characteristics Moving the balance point forward may
improve the smoothness and arrow-like tracking, but it
may then require more speed for takeoff and make it more
difficult to slow down for landing Moving the balance point
aft makes the model more agile with a lighter and snappier
"feel and often improves knife-edge capabilities In any
case please start at the location we recommend and do
not at any time balance your model outside the
recommended range.
4. If you have built your Easy Sport as a taildragger, you
must block up the fuselage, as shown, until the stab is
level Failure to do this before the model is lifted to
check for balance will result in an erroneous reading
5 On the Easy Sport 60, after the airplane is balanced,
use medium CA to glue the servo tray to the fuse
doublers.
NOTE: The balance and surface throws for this aircraft
have been extensively tested We are confident that they
represent the settings at which the Easy Sport flies best
Please set up your aircraft to the specifications listed
above If, after a few flights, you would like to adjust the
throws to suit your tastes, that is fine
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