The durable, plastic
wheel pants are
retained with two
machine screws and
The elevator linkage has been installed. The adjustable pushrods
make control surface adjustments easy.
The PTE 72 comes with the hardware needed to install it on
the airframe. Also included is an ignition unit and mufflers.
on the control surfaces and a Futaba
S9351 servo was used on the throttle.
The servos fit perfectly in the wings,
fuselage, and horizontal stabilizers.
RTL Fasteners 9/16-inch socket head
servo screws secured the servos.
The supplied adjustable pushrods
and ball links were used to connect
the servo arms to the control horns.
The rudder servo was installed in
the rudder tray and a double servo
arm was mounted on the servo. The
cables connect the
servo to the rudder.
The fuselage has
precut locations for
the Futaba heavy-duty switches. Two
and two Wrong
Way RC 2S
2,300 mAh A123
battery packs were
mounted in the
The firewall is
premarked for a
DLE- 55 engine.
location for the
PTE 72 twin-cylinder engine
came with the
engine was used
to locate and mark
the four mounting holes.
After the holes were
drilled, the supplied
mounting bolts secured
the engine to the
firewall. The supplied
engine mufflers easily fit
inside the large cowling.
The airframe has a built-in tunnel for mounting
a canister muffler if a
quieter exhaust system
The ignition unit was
mounted inside the
motor box and a Tech-Aero Ultra Ignition
Circuit was used to provide power
to the ignition unit. A Dremel tool
with a sanding drum was used to
make the necessary openings in the
cowling. A fuel dot for fueling and
defueling the airplane was installed on
the side of the fuselage. Mounting the
Falcon propeller and the Dave Brown
Products 31/2-inch spinner completed
the engine installation.
The control surface throws and
center of gravity (CG) were set to
Warranty: 2 years
Weight: Engine: 3. 32 pounds; ignition unit:
4. 1 ounces
Displacement: 4. 39 cubic inches (72cc)
Engine width: 11. 125 inches
Recommended propellers: Two-blade 23 x
8 or 24 x 10
Oil ratio: 25: 1 to 40: 1 (see manual)
Included with engine: Propeller bolts,
propeller washer, ignition unit, spark plugs,
spark plug wrench, mufflers, mounting
hardware, standoffs, mounting template,
and owner’s manual
Redwing RC recently introduced the PTE 72cc twin-cylinder gasoline engine—the big brother
to the PTE 36 single-cylinder gas
engine. Included with the PTE 72 is an
electronic ignition unit and mufflers.
It features a high-quality Walbro
carburetor and a two-year warranty.
Redwing RC has its own in-house
service department that performs
warranty work and repairs.
The modeler can also select a prerun
option, for which the engine technician
will mount, start, test, and perform the
initial break-in cycles on the engine.
This is a great way to ensure that your
new engine is ready to power your next
Giant Scale project.
the manufacturer’s recommended settings,
and the failsafe was programmed into the
Futaba 14SG transmitter.
At the flying field, the airplane was
assembled and given a thorough preflight
inspection. A range check was performed
both with and without the engine running.
After taking a few pictures and topping off
the fuel tank, the model was ready for its
The PTE 72 was easy to start and ran
great with the factory needle settings. The
takeoff roll was straight, with little rudder
input needed. It didn’t take long for me
PTE 72cc Gas Engine
74 Model Aviation SEP TEMBER 2015 www.ModelAviation.com