The Buzz 400’s uncovered airframe
shows all of the assembled
Model type: Electric park flyer kit
Skill level: Beginner/intermediate
Wingspan: 40 inches
Wing area: 355 square inches
Airfoil: Flat bottom
Length: 30 inches
Weight: 18 ounces
Radio: Four-channel with two servos
ESC: 25 amp
Battery: Two-cell 1,350 mAh
Motor: Sport 400 2,200 Kv ( 75-100
Radio system: Spektrum DX8 transmitter;
Spektrum AR 400 receiver;
two Hitec HS- 55 servos;
1,600 mAh 2S battery
APC 8 x 4 propeller
ESC: Scorpion 25-amp Commander
Ready-to-fly weight: 19 ounces
Flight duration: 12 minutes
Construction: Laser-cut balsa and plywood
• Accurate laser-cut parts and easy construction.
• Easy to transport.
• Excellent instruction manual.
• Easy to build and fly.
• None noted.
AT A GLANCE ...
before covering, use wood filler. I used
a thin, soupy Hobbico Hobbylite filler
and water mix and painted it on. After
it has cured, it sands easily with 220-grit
sandpaper, leaving the surface smoother
and the grain filled. The covering will go
on smoothly and look great.
I covered the Buzz 400 with
Solarfilm, which is best for a light- or
medium-strength structure. I find
it easy to work with. It has good
shrinking qualities and uses lower
covering iron temperatures.
I use Toni’s Covering Iron Sock to
keep from scratching the film. Solarfilm
is available in a variety of colors,
opaque and transparent. I chose silver
and dark red with a black trim.
I powered the Buzz 400 with a
Scorpion SI-2212-1850 motor using
a 25-amp Commander ESC. Hooking
up my wattmeter I found that I was
drawing 16 amps on a two-cell battery
providing 120 watts with an 8 x 4 APC
I thought that was more power
than I needed for a 19-ounce airplane;
however, I could cruise along at
roughly one-third throttle and get
more airtime! A smaller propeller
would have brought the amps down,
but I decided to go with this setup.
I had a two-cell, 1,600 mAh LiPo
battery that fit perfectly. After shifting
its position several times, I managed to
achieve the CG stated in the manual.
The Scorpion is an efficient motor. I
have used several and have appreciated
its excellent performance and built-in
I arrived at the flying field on a
beautiful, sunny day hoping the wind
would be down, but it wasn’t. It was
blowing up to 12 mph, but I decided
to fly in it anyway. My Buzz liked to
ground loop on takeoff. The trouble
was in the wheel alignment.
Bending the landing gear so the
wheels would track straight fixed the
issue. With the power I had it wasn’t
on the ground long.
The CG’s location has much to do
with how the airplane flies. My setup
lacked directional stability, so I moved
the battery forward, which helped.
In rough air, the Buzz will roll side
to side. It is self-righting with plenty
of dihedral. Unfortunately, the wind
wouldn’t let me fly it any more that
I flew it several times later in calm
conditions and it flew great. This is
definitely an airplane for calm air, but
it can be flown in a light wind. When
trimmed, it flew hands-off with only a
The shock-absorbing landing gear is a
trademark of Stevens AeroModel and works
extremely well. The supplied 2.5-inch Du-Bro wheels allow for easy grass takeoffs and
73 Model Aviation OC TOBER 2013 www.ModelAviation.com