Type: Sport EDF jet
Wingspan: 25 inches
Wing area: 141 square inches
Length: 31 inches
Radio: Tactic T TX850 2. 4 GHz
transmitter; Tactic TR624
receiver; and three micro
servos (servos included)
Components Four-plus-channel radio
needed to system; 30-minute epoxy;
complete: basic assembly tools
Minimal flying area: Club field
Power system Ammo 24-45-3790 brushless
(included): motor; 56mm HyperFlow
ducted fan; 40-amp ESC.
ElectriFly 3S 2,200 mAh 30C battery
Power output: 19. 6 amps, 227 watts, 167
watts per pound
Flying weight: 21. 7 ounces
Flight time: 7 minutes
Wing loading: 22. 2 ounces per square foot
ElectriFly 4S 2,200 mAh 30C battery
Power output: 32.0 amps, 483 watts, 326
watts per pound
Flying weight: 23. 7 ounces
Flight time: 5 minutes
Wing loading: 24. 2 ounces per square foot
• Fun performance with three-cell or four-cell
• Colorful paint scheme.
• Easy assembly.
• Canopy didn’t fit when using a four-cell
AT A GLANCE ...
A few relief cuts allow the floor of the forward cockpit to flex upward
when the battery is installed to prevent battery interference.
Small magnets hold the detachable tip tanks on firmly during flight,
but allow them to harmlessly break free if they snag tall grass during
The aileron servos come seated in the wing with pushrods and plastic
covers to protect them.
grass on landing.
At 23. 7 ounces,
L- 39 was actually
slightly below the
weight range listed
in the manual.
That doesn’t often
at the suggested
CG location with
A preflight power
that I had nearly
500 watts on tap!
Out of curiosity
I also checked the
power system with
a 3S 2,200 mAh
the 3S battery
less than half the
power of the 4S
battery, the power
it would fly just
fine. I also verified
that the model
balanced with the
Flying the L- 39
landing gear, it
helper tossed the
airplane for the first flight while I concentrated on piloting.
The first launch progressed with no problems, so I spent
the flight trimming the model and exploring its flight
performance. It was predictable, relatively easy to fly, and
sufficiently fast. As maiden flights go, this one was drama free.
Only after landing did I realize that I had accidentally flown
the L- 39 with the 3S battery!
Subsequent flights using the intended 4S battery have
revealed a different side of the L- 39. There is plenty of
thrust to make my own hand launches. The top-end speed is
considerably faster with the 4S battery. Flyzone claims that the
L- 39 is capable of 90-plus-mph speeds, and I don’t doubt it.
I appreciate the paint scheme’s bold colors. The L- 39 is easy
to see and keep oriented in flight. With a fast mover such as this,
there’s no time for squinting or guessing which way it’s pointed.
This model does not have to flaunt its speed. I might only
hit full power a few times during a given flight—just to put an
exclamation point on a low pass. It will happily cruise at half
to three-quarters throttle with plenty of speed and aerobatic
ability. Reducing throttle will extend your flight times. I
75 Model Aviation AUGUS T 2015 www.ModelAviation.com