In the Air
To fly the microflyers you just let go. No toss necessary. They climb out with authority and you control
the ascent and descent with the throttle. The rudder
is programmed on the right stick and if you fly
much, you will notice a constant urge to move the
left stick for a coordinated turn. Once in the air, you
can adjust the throttle, which is not spring loaded
so it holds in the position you select. Gaining level
flight you can begin to maneuver.
You will notice with rudder turns the need to apply some throttle if those turns are tight.
Otherwise, you will lose altitude. I thought all three models turned somewhat easier to the
left than the right so in the grand scheme of scale and proportions, there is likely some
prop torque to fight. I never really noticed any bad tendencies in the air unless you got too
tight on the turns and slowed too much. In those cases, the only way out is to hit the throttle and back off the rudder.
A low battery warning reduces the throttle input by 60 percent at the first signs of a low
battery, and then if you continue to fly it will reduce that by another 30 percent, forcing you
to land. The receiver also shows the level of the battery with LED flashes.
Because these are only two channel systems, aerobatic performance is not available.
Even in a dive, I was unable to roll the microflyer over. At full throttle the planes climb, but
do not loop. If you put more elevator into the tail by simply bending the Durobatic foam
you’ll get close to a loop, but I found that flying was not worth the effort. There was just too
much fun in flying them as designed.
RADIO HFX900 Air Model 2
MOTOR 4mm and 4mm geared
BATTERY 20mAh LiPo
PROP 32mm plastic and carbon-
You really get a lot when you purchase an
RTF microflyer from Plantraco. First of all,
you get simplicity in a highly technologically advanced product. Consider the
airframes. The Butterfly is carbon fiber and
Durobatic foam construction and has a
4mm coreless motor swinging a carbon-fiber 32mm propeller and 0.07-gram rudder
actuator with a 20mAh LiPo and a current
draw of 155mA at 2150rpm. The MicroMAV
uses the same motor but with a 5:1 gear
reduction, draws 170mA and is completely
constructed of Durobatic foam. The P- 40
Classroom Fighter uses the same motor,
gearbox, receiver and actuators as both the
Butterfly and the MicroMAV but looks bigger, even though it weighs in at 7 grams.
Using the term “classroom fighter” might
lead one to believe the P- 40 is all about
USING THE TERM
LEAD ONE TO
BELIEVE THE P- 40
IS ALL ABOUT
WHERE YOU FLY IT,
BUT REALLY THERE
IS SO MUCH MORE
General Flight Performance
STABILITY The planes are really easy to control.
TRACKING The dial trims worked perfectly and in just a few seconds you have straight
flight. Level flight is easily achieved with the throttle.
AEROBATICS These are not designed for aerobatics.
GLIDE & STALL PERFORMANCE Their glide slopes are proportional to the size and weight.
When you cut the throttle they head for the ground, but in a gentle 7-gram fall.
While not specifically advertised as a trainer, I can see so many skill-building elements for
young and old newcomers to the RC hobby. If you fly over tall grass, you will never damage
the plane, even in the most severe impacts. I did notice, and this is something to be careful of, that the battery will depart from the receiver on impact, so immediately begin looking for the battery. It is small so don’t step on it!
where you fly it, but really there is so much
more. The markings on this P- 40 include
the famous British shark mouth and the 12-
point sun of the Chinese Air Force Flying
Tigers. Imagine the classroom now as the P-
40 becomes the focus of discussion about
the American Volunteer Group in 1941 and
1942 fighting within the Chinese Air Force,
the names of Franklin D. Roosevelt, Claire
Chennault and Pappy Boyington and
finally, ask if anyone has heard of the
“Blood Chit” and the demonstration model
As RTFs, all of Plantraco’s microflyers
arrive in a cardboard box with special foam
inserts to secure the plane. I like to think
they have their own special hangar. The
small 900MHz fully proportional transmitter does not have antennae but has a range
of approximately 300 feet. Trims are provided and the transmitter also acts as a
charging station for both 5 and 10mm LiPo
packs using four AA batteries. With an addi-