Center Of Gravity - Hangar 9 Taylorcraft 20cc ARF Assembly Manual

Step 16
Remove the fuel dot plug from the fill line and slide
the cowl partially onto the fuselage. Feed the fuel fill
and vent lines through the holes in the lower cowl. In-
sert the plug in the fill line and retain the secure the
vent line with a small cable tie. Do not tighten the
cable tie so much that the tube is constricted.
Step 17
Secure the cowl with four 4-40 x 1/2-inch button head
machine screws using a 5/64-inch hex wrench.
48
Step 18
Install the spinner and propeller with the appropriately
sized wrench for the engine being used.

Center of Gravity

An important part of preparing the aircraft for flight
is properly balancing the model.
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location for
your model is 3 3/4-inch (95mm) behind the leading
edge of the wing (25% chord). Mark the location for
the Center of Gravity on a piece of low-tack tape on
the bottom of the wing next to the fuselage as shown.
When balancing your model, support the plane
upright at the marks made on the bottom of the wing
with your fingers or a commercially available
balancing stand. This is the correct balance point for
your model. You might find you need to add a small
amount of weight to either the front or back of the
fuselage to achieve the correct balance.
After the first flights, the CG position may be adjusted
to suit your personal preference. Prototypes have been
flown with the CG as far back as 4 1/8-inch (105mm).
Hangar 9 Taylorcraft 20cc Assembly Manual