Dynaflite GPMA0090 Butterfly - Manual (Page 36)

36
❏
1. Temporarily position the battery pack and
receiver inside the fuselage in a location that will
achieve balance at the Center of Gravity (C.G.)
shown on the plan and described in the
Balance
Your Model section that follows. In our prototype
a 500mAh fl at pack wrapped with 1/4" foam fi t
“snugly” underneath the fuel tank supports shown
in step 16 on page 26.
❏
2. Cut the covering from the holes in the fuselage
sides for the wing dowels, then glue the dowels
in position with medium CA. Fuelproof the ends
of the dowels with thin CA, epoxy paint or epoxy.
❏
3. Mount the on/off switch on the side of the
model that is opposite the engine exhaust in a
location that will not interfere with the receiver or
pushrods.
❏
4. Route the receiver antenna through the
antenna tube (if you installed one) or through the
top of the fuselage to a T-pin inserted into the
leading edge of the fi n. Make a strain relief and a
hook from an unused servo arm as shown in the
sketch.
Never shorten the antenna wire.
Mount the Wing
❏
1. Apply 1/16" thick Great Planes Single-Sided
Foam Tape (GPMQ4422) to the wing saddle of
the fuselage.
❏
2. Poke a hole through the covering where you
drilled the 1/16" holes in the bottom spar of both
wing halves for the #2 x 3/8" screws. Pack the
holes with 6-minute epoxy, then immediately install
the screws.
❏
3. Join both wing halves with the wing joiner rod,
then secure the wing halves together by wrapping
a couple of rubber bands around the screws in the
bottom spar.
❏
4. Place the wing on the fuselage, then hold it in
place with two or four #64 rubber bands. When it
is time to fl y your Butterfl y, you should secure the
wing with eight rubber bands and cross the last two.
Balance Your Model
This section is IMPORTANT and must NOT be
omitted. A model that is not properly balanced will
be
unstable and possibly unfl yable .
❏ 1
. Check the balance point with all components
installed in the model and the fuel tank empty .
Attach the wing to the fuselage with a few rubber
bands, then accurately mark the balance point
on the bottom of both wing halves
next to the
fuselage . The balance point is shown on the plan
and is 3-3/16" (81mm) aft of the leading edge.
3-3/16"
❏
2. Lift the model with your fi ngers at the balance
point or make a simple stand as shown in the
sketch. If the tail drops, shift the receiver and/or
battery pack forward (if possible) to balance the
model. If the nose drops, shift the receiver and/or