8
However, if you like, there are pre-cut holes in the rear of the fuselage for 4 standard size servos should you
decide to install them in the rear for a push-pull system. Please be advised that installing the servos in the
rear may result in a tail-heavy airplane and should be used for pilots more interested in 3D and freestyle
aerobatics rather than precision aerobatics.
3. Make appropriate mounts for installing you receiver, batteries, switches, and antenna routing tubes.
We highly recommend the J’TEC Clamp-loks for a neat installation of servo wires in the fuselage
and antenna routing tubes. Remember to keep the receivers at least 12” from the ignition module
and separate the antennas from the servo leads as much as possible. Spending a little extra time here
to do this may save time at the flying field trouble shooting radio issues if any. Additionally, we try
to keep the batteries positioned so that they can be mounted securely, but also easily moveable for
quick CG changes if needed during initial set-up.
Servo Recommendations
Futaba Digital
JR Hitec
Aileron
S-9206 x 6 9155 x 6 S-8611SA x 6 5955 x 6
Elevator
S-9206 x 4 9155 x 2 S-8611SA x 2 5955 x 2
Rudder
S-5301 x 3 9155 x 3 S-8611SA x 3 5735 x 2
Throttle
S-3002 Mini
S-8101 or any coreless
Engine Installation
The firewall is installed with 3 degrees or right thrust built it.
First, locate the vertical centerline and the horizontal centerline on the firewall. Use the actual
firewall itself to locate the centerlines (don’t use the front of the motor box to establish the
centerline).
1. If you will be using a DA-150 or 3W-150, draw another vertical line 10mm (aprox. 13/32) from the
center vertical line. When looking at the firewall from the front, draw the new vertical line to the
right of the center vertical line. The intersection of the new vertical line and the horizontal line is the
center of your engine mount.
2. Now locate, and then drill the engine mounting holes on the firewall. For the DA-150 and the 3W-
150, the engine mounting holes are 80 mm (3.15 in) apart laterally, and 90 mm (3.54 in) apart
vertically.
3. If you have an engine other than a DA-150 or 3W-150, and the distance between the back face of the
motor mount and the front face of the drive washer is less than 7.7 inches (195.5mm) you will have
to install spacers between the back face of the motor mount and the firewall so that the back face of
the spacer and the front face of the drive washer is 7.7 inches (195.5mm). Then, you can use the
same 10mm lateral offset of the vertical centerline to mount your engine.
4. After you have drilled the holes for engine mount, check the back of the firewall to see where the
holes are. It may be necessary to remove some of the wood that is used to reinforce the motor box
and firewall joints to make room for the blind nuts. Then, install the blind nuts.
