Type: Semiscale foam electric
Wingspan: 55. 6 inches
Wing area: 532 square inches
Length: 49 inches
Radio: Spektrum DX8 2. 4 GHz
AR636A receiver (included);
eight digital metal gear
Needed to Minimum six-channel DSMX-
complete: compatible transmitter; 4S
2,400 to 2,800 mAh 30C LiPo
flying area: Club field
Power system: E-flite BL4250 540 Kv
brushless motor (included);
E-flite 70-amp ESC (included);
(included); E-flite 4S 2,800
mAh 30C LiPo battery
Power output: 46. 3 amps; 679 watts
Flying weight: 90. 3 ounces
Flight time: 4 to 6 minutes
Wing loading: 24. 4 ounces per square foot
• Great scale looks.
• Powerful warbirdlike performance.
• Some tweaking required during assembly.
• Manual could be better.
AT A GLANCE ...
The Staufenbiel Red Bull F4U- 4 Corsair is a large, prefinished foam model. It includes everything
except a DSMX-compatible transmitter and a four-cell LiPo battery.
Photos by the author
A large hatch allows access to the
battery compartment and some of the
radio gear. The radio bay includes a
Spektrum AR636A receiver and two
17-gram digital servos. These servos, like
all of the others in the model, are not
directly attached to the receiver. Instead,
they are first connected to a circuit
board that is located on a plywood
mount above the wing halves.
The ailerons are actuated by another
pair of 17-gram servos. A final pair of
17-gram servos is used to manipulate the
model’s wing flaps.
Electronic retracts are factory
mounted in the wing. Like the full-scale
Corsair, the wheel axle rotates 90° as
the gear retracts or extends. A separate
9-gram servo in each wing panel opens
and closes the landing gear bay doors.
Assembling the Corsair
Although most of the work is done
at the factory, there are still several
important finishing steps that need to
be completed. Resist the temptation to
breeze through these tasks. The Corsair
is a large, powerful model that requires
thoughtful preparation to ensure success.
Plan to spend an evening or two to get
Staufenbiel includes a multilingual
printed manual with the Corsair. Choose
a language and read all of the assembly
steps before touching the model. The
manual covers a few variants of the
kit that have different components, so
there is some conflicting information.
Everything you need to know is in
there; you simply have to filter out
the superfluous data. I think that most
modelers will have no trouble sorting
With six servos, landing gear, and
lights located in the wing, there is a
sizeable bundle of wires that must be
connected. This burden is eased by
an adapter that consolidates all of the
necessary plugs from each wing half into
a single six-wire plug that mates with
the circuit board in the fuselage. This
significantly reduces the nest of wires
in the fuselage and also makes it easy
to install or remove the wing. You only
have to detach the two six-wire plugs
and unbolt the wing.
I cleaned up the wing wiring using
zip ties. I also cut away some foam from
a ridge on the upper wing root for the
wires to pass through. After placing the
bundled wires in the cutout, I secured
them with Blenderm tape.
As I was completing all of the
wing connections, I noticed that the
components in the starboard wing
were responding intermittently. My
troubleshooting revealed that the female
six-pin plug on the circuit board had
a few cold-soldered joints. I touched
each of the pins on the board with a
25-watt soldering iron to reflow the
solder and since then, everything has
worked perfectly. Although this was a
critical repair to make, it took only a few
minutes to complete.
The pushrods provided for the flaps
were slightly too long to be used in their
stock form. I cut off the factory-applied
Z-bends and then put the shortened
pushrods back into the correct shape
using Z-bend pliers. I also applied a dab
of Goop adhesive at the base of each
clevis to ensure that they cannot slip on
the pushrod threads.
62 Model Aviation SEP TEMBER 2016