Top Flite TOPA0951 - Manual (Page 9)

9
HOOK UP THE FLAPS AND AILERONS
Center Panel
Outer Panels
Before hooking up the fl aps and ailerons note the
orientation of the servo hatch covers in the bottom
of the wing panels.
❏
1. Install the rubber grommets and eyelets into the
servos. Hold two hardwood servo mount blocks to
your fl ap servo with thin cardstock or 1/32" [.8mm]
plywood spacers under the servo and between the
blocks and the servo to provide the necessary spacing
for proper vibration isolation. Drill 1/16" [1.6mm] holes
into the servo mount blocks for the servo mounting
screws and mount the servo to the blocks with the
screws that came with the servos.
❏
2. Mount the other fl ap servo to another set of mount
blocks the same way.
❏
3. Temporarily place the servo arms on the fl ap
servos to aid in centering them in the hatch openings.
Use 30-minute epoxy to securely glue the mount blocks
to the hatch covers with the arms centered both fore
and aft and side-to-side in the openings—be certain
to apply epoxy to the
ends of the blocks and to the
hatch for a secure bond.
❏
4. Cut two 6" [150mm]
pushrods to a length of 4-1/4"
[108mm] by cutting the un-
threaded end. Read the
Expert Tip that follows about
soldering, then solder a clevis
onto one end of each pushrod.
While you have your soldering
equipment out, go ahead and
cut the aileron pushrods to a
length of 3-1/4" [83mm] and
solder the clevises to them
as well.
HOW TO SOLDER
1. Use denatured alcohol or other solvent to
thoroughly clean the pushrod. Roughen the end of
the pushrod with coarse sandpaper where it is to
be soldered.
2. Apply a few drops of soldering fl ux to the end of
the pushrod, and then use a soldering iron or a torch
to heat it. “Tin” the heated area with silver solder
by applying the solder to the end. The heat of the
pushrod should melt the solder – not the fl ame of
the torch or soldering iron – thus allowing the solder
to fl ow. The end of the wire should be coated with
solder all the way around.
3. Place the clevis on the end of the pushrod. Add
another drop of fl ux, then heat and add solder. The
same as before, the heat of the parts being soldered
should melt the solder, thus allowing it to fl ow. Allow
the joint to cool naturally without being disturbed.
Avoid excess blobs, but make certain the joint is
thoroughly soldered. The solder should be shiny, not
rough. If necessary, reheat the joint and allow to cool.
4. Immediately after the solder has solidifi ed, but
while it is still hot, use a cloth to quickly wipe off
the fl ux before it hardens.
Important: After the joint
cools, coat the joint with oil to prevent rust. Note: Do
not use the acid fl ux that comes with silver solder
for electrical soldering.
This is what a properly soldered clevis looks
like – shiny solder with good flow, no blobs and
flux removed.
Aileron Pushrod
3
-1
/4" [
8
3
mm
]
4-1
/4" [
1
0
8
mm
]
Flap
Pushrod