C. G.
C. G.
19
19
85mm
85mm
3.35 in
3.35 in
The ideal C.G. position is
85mm(3.35 in.)
behind
the leading edge measured at where the wing meets
the fuselage. In order to obtain the C.G. specified,
add weight to the fuselage or move the battery
position. Check the C.G. before flying.
Important Safety Precautions
Important Safety Precautions
# First time flyer should never fly by himself / herself. Assistance from experienced flyer is
# First time flyer should never fly by himself / herself. Assistance from experienced flyer is
absolutely necessary.
absolutely necessary.
#Pre-flight adjustment must be done before flying, it is very dangerous to fly a badly
#Pre-flight adjustment must be done before flying, it is very dangerous to fly a badly
pre-adjusted aircraft.
pre-adjusted aircraft.
#Make sure the air field is spacious, never fly the plane too close to people and never get
#Make sure the air field is spacious, never fly the plane too close to people and never get
too close to a running propeller.
too close to a running propeller.
#If you find wrinkles on the covering as a result of weather changes, you can use hot iron
#If you find wrinkles on the covering as a result of weather changes, you can use hot iron
to remove the wrinkles. Please begin with lower temperature setting and gradually raise
to remove the wrinkles. Please begin with lower temperature setting and gradually raise
the temperature until the wrinkles are gone. Too hot an iron may damage the covering.
the temperature until the wrinkles are gone. Too hot an iron may damage the covering.
#Check and re-tighten up all factory assembled screws, use thread locker if applicable.
#Check and re-tighten up all factory assembled screws, use thread locker if applicable.
#
HAPPY FLY 20
is specially designed to be powered by
0.25 2
stroke glow
#
HAPPY FLY 20
is specially designed to be powered by
0.25 2
stroke glow
engine, using a more
engine, using a more powerful engine does not mean better performance. In fact, over
powerful engine does not mean better performance. In fact, over
powered engine may
powered engine may cause severe damge and injuries.
cause severe damge and injuries.
A022S0606
