Carl Goldberg GBGA0067 - Manual (Page 23)

3. ‡ When the firewall has thoroughly dried, tack-
glue the motor you intend to use to the
ENGINE MOUNTS.
‡ Align the marks on the engine mounts with the
vertical marking line on the firewall.
‡ Center the engine mounts on the horizontal
marking line, as shown, and mark all four hole
locations.
‡ Mark the location of the throttle pushrod exit in
line with the throttle control.
4. ‡ Drill a 5/32” diameter hole at each hole loca-
tion.
‡ Flip the firewall over and insert four 6-32
BLIND NUTS. Seat them with a soft hammer
blow.
‡ Making sure that the glue does not get into the
threads, coat the edges of each blind nut with
CA glue. Then, set the firewall aside.
NOTE: Flying the Sukhoi with one of the larger
recommended engines will produce spectacular
results. However, these larger 4-stroke engines
generate a lot of vibration. Therefore, you may
wish to install two elevator servos. If you choose
this option, refer to the following instructions.
(a) Do not punch out the elevator exit. Instead, glue it
permanently in place.
(b) Cut a hole for the servo on each side of the fuse-
lage, as shown.
(c) Make two doublers from scrap 1/8 x 1/4 x 1-1/4"
ply and glue the forward doubler to the INSIDE of
the fuselage. Glue the rear doubler to the OUT-
SIDE of the fuselage. This helps to position the
servo more parallel to the elevator pushrod.
(d) From the fuse side punch-out, cut off about a 1”
piece from the end and glue this strip back into the
fuse.
(e) When mounting the servos, it is essential that one
of the servos be reversed. The easiest way to
accomplish this is to use a special Y- harness
that will reverse one servo from the other.
Alternatively, "mix" your elevator channel into an
exta channel in your radio, and then reverse to
achieve proper direction. Consult your radio man-
ual for details.
(f) Using the elevator pushrod wire supplied in the kit,
trim to fit, making sure there are no bends. When
adjusting throws, try to get both elevators to move
equally.
TWO SERVO OPTION
‡ Tape together and place under a weight until
dry.
23
1/2 ENGINE WIDTH
ALIGN MARKS
PLY DOUBLER
SERVO CUT-OUT
DO NOT REMOVE
FROM PUNCH-OUT
1”
FORMER J