Great Planes L-39
Albatros EDF Jet is now available in both ARF and Receiver-Ready
(RxR) versions. The RxR version features pre-installed electronics
so you simply install the receiver, battery, and start flying!
straightforward design of the L-39 fighter makes it an excellent
match for R/C model reproduction. ElectriFly's sport-scale version
combines extreme brushless motor performance with advanced HyperFlow™
ducted fan technology. The L-39 exhibits a wide-open flight envelope
that all jet pilots will enjoy.
L-39's smooth Aerocell™ surface comes already finished with
a military-style camouflage trim. The decals are factory-applied
and detachable display magnetic armament is also included.
lightweight AeroCell™ construction
Factory-finished for aggressive fighter jet looks
Included HyperFlow™ ducted fan unit with powerful Ammo
20-40-3500 in-runner brushless motor (Installed)
Low parts count for fast, easy assembly
Included detailed canopy for static display
ElectriFly™ Silver Series SS-25 ESC (Installed)
Three ES50 nano servos (Installed)
Magnet-secured hatch and wing tips (Installed)
Display stand included
25 in (635 mm)
Wing Area: 141 in² (9.1 dm²)
Weight: 17.5-18.5 oz (500-520 g)
Wing Loading: 17.9-18.9 oz/ft² (55-58 g/dm²)
Length: 31 in (780 mm)
RxR Version Requires: 3-channel radio, micro receiver, and 910-1250mAh
11.1V LiPo battery
L-39 Albatros comes well secured in the box with all the parts protected
and wrapped in plastic. I removed the plastic bags on some parts for
a better look. A 12-page assembly manual, decal sheet, and 8-page HyperFlow™
manual (not shown) are included. Individual parts are available for
the L-39 and the HyperFlow™ ducted fan is easily accessed for maintenance,
decals are factory applied and all the display armament is easy detachable
(before flying) via magnets. The L-39 also includes a display stand
to keep the model on when not flying.
L-39 wing is completely assembled, with two servos installed, and is
ready to attach to the fuselage. The tips are held in place by magnets
to help prevent damage on those less than perfect landings.
closer look at the fuselage reveals that magnetic-secured hatch covers
allow easy access to the battery and ducted fan compartments. The ElectriFly™
Silver Series SS-25 brushless ESC and ES50 nano servos are factory-installed.
HyperFlow™ ducted fan unit comes completely assembled and ready
to run. It was designed using flow analysis and state-of-the-art computer
modeling software. The HyperFlow ducted fan and Ammo brushless motor
combination produces impressive thrust and speed.
is advanced foam that is tough enough to take abuse yet light enough
for electric flight. This closed-cell foam delivers the benefits
of costly composite construction in a more pilot-friendly, easy
building form. AeroCell™ offers the structural strength and
rigidity of traditional structures without building and the weight
advantages of foam without the brittleness and breakage. AeroCell™
provides a smooth, paintable surface that comes out of the box factory-finished
and decaled for stunning presence in the sky!
assembly begins with a few quick glues, one for the main wing
and another for the stabilizers. Both sections are keyed for easy
alignment, so before you know, you have a jet!
elevator linkage is pre-installed so you simply connect it to
the control horn and secure it with the keeper.
FASST Receiver & Canopy:
positioned my R617FS
FASST receiver on top of the folded servo wires and tucked it
neatly into the compartment next to the elevator servo. I test
fit a 5oz ThunderPower 3-cell 2100mAh pack just in front of the
receiver for a perfect balance. The ESC went in up front where
I can open some air holes for cooling, if needed.
that a second canopy comes with the L-39 for actual flight. According
to the manual, the decorated canopy with the pilots is just for
display. We later discovered that it works just fine in flight.
Great Planes ElectriFly 11.1V 1250mAh 20C LiPo pack weighs only
3.8oz and properly balances the L-39 when placed as far forward
in the nose as possible. This means that a smaller capacity pack
may be too light to properly balance the L-39. The slightly thinner
pack allows the ESC to fit along the side. My plan was to test
several packs to compare balance and the effects on performance.
that I inverted the receiver and held it in place (along with
all the extra wires) using a few toothpicks.
included display stand glues together with either epoxy or white
glue. It can be used hold the model with all its armaments and
second cockpit with the pilots when not flying.
finishing the L-39, I was impressed with all the magnetically-held
armaments, wing tips, and alternate canopy for display. Further,
the model really looked nice sitting on the included stand.
measured the flying model (without armaments) to be 13.8oz without
battery. The power levels of my two test batteries were similar
due to the added weight. It will be interesting to see if the
additional ounce makes a noticeable difference in flight. The
ElectriFly 3s 1250mAh 20C pack weighed 3.8 ounces and provided
110w at 10amps for 100w/lb. The ThunderPower 3s 2100mAh 15C pack
weighed 5 ounces and provided 122w at 11amps for 104w/lb.
Test Flying / Summary
tested the L-39 over a sunny weekend when the temperature was
about 40 degrees F and the winds were about 10mph. The first
flight was using the 4oz ElectriFly 3s 20C 1250mAh LiPo pack
positioned all the way forward in the nose as far as it could
little EDF jet flew very well. It had plenty of power and could
fly with aerobatics for at least 8 minutes, probably more. The
CG was still a touch tail heavy which was noticed when performing
rolls and flying inverted. This 1250mAh pack is likely the smallest
pack that I would recommend for this model and perhaps the ElectriFly
3s 1500mAh 20C LiPo pack would be a better choice for proper
balance and increased duration.
the second flight we used the heavier 5oz ThunderPower 15C 3s
2100mAh LiPo pack and needed to position it an inch back from
full forward in the nose. The power increase of the larger capacity
pack was noticeable and the L-39 rolled more evenly with the
balance a bit more nose heavy. Flight times went beyond 10 minutes
as we landed with power to spare.
not shown in the photos, we also flew the second and third flights
using the "display" canopy without any issue. Both
canopies and wing tips remained in place for all three flights
including the landings. The amount of pre-installed magnets
on this model is unsurpassed!
L-39 is a great flying jet! The HyperFlow™
ducted fan technology really performs well and the model exhibits
a wide-open flight envelope that allowed us to relax at lower
speeds or hit full-throttle for fast fly-bys.
model requires intermediate flying skills. Paul and I had a
blast putting it through many maneuvers and the L-39 remained
stabile. I was impressed with all attention to the little details,
overall design, and flying performance of this smaller EDF.
It truly performs well and looks great either in the air or
on the included display stand.
Great Planes Model Distributors
P.O. Box 9021
Champaign, IL 61826-9021
The comments, observations and conclusions made in this review are solely with respect to the particular item the editor reviewed and may not apply generally to similar products by the manufacturer. We cannot be responsible for any manufacturer defects in workmanship or other deficiencies in products like the one featured in the review.