Great Planes Super Sportster 40 MkII Kit - GPMA0205 - Manual (Page 35)

CAUTION (THIS APPLIES TO ALL R/C AIRPLANES) If, while
flying, you notice any unusual sounds, such as a low-pitched
"buzz," this may be an indication of control surface "flutter"
Because flutter can quickly destroy components of your
airplane any time you detect flutter you must immediately cut
the throttle and land the airplane' Check all servo grommets for
deterioration (this will indicate which surface fluttered), and
make sure all pushrod linkages are slop-free If it fluttered once,
it probably will flutter again under similar circumstances unless
you can eliminate the slop or flexing in the linkages Here are
some things which can result in flutter Excessive hinge gap,
Not mounting control horns solidly, Sloppy fit of clevis pin in
horn, Elasticity present in flexible plastic pushrods Side play of
pushrod in guide tube caused by tight bends, Sloppy fit of
pushrod wire in servo arm, Insufficient glue used when gluing in
the elevator joiner wire or aileron torque rod, Excessive flexing
of aileron, caused by using too soft balsa aileron, Excessive
"play" or "backlash" in servo gears, and insecure servo
mounting
We recommend that you take it easy with your Sportster for
the first several flights, gradually "getting acquainted" with
this classic sport plane as your engine gets fully broken-in
Add and practice one maneuver at a time, learning how she
behaves in each For ultra-smooth flying and normal
maneuvers, we recommend using the "low rate' settings as
listed on page 32 "High rate" elevator may be required for
crisp snap rolls and spins Speed is the key to good knife-
edge performance
loading and shoulder-mounted wing with symmetrical airfoil
increase maneuverability CAD engineering and
interlocking, all-wood parts make it easy to assemble.
Requires a 2-stroke .35-.46 or 4-stroke .48-.60 engine and
4-channel radio.
PIPER J-3CUB..................................................GPMA0160
Created from drawings of the original aircraft, Great Planes'
Cub kit takes advantage of today's finest engineering,
including state-of-the-art interlocking construction Nearly
all the wood parts are balsa for easy finishing—and
numerous scale details provide irresistible realism The kit
can be built with a 76 5" span or clipped 61 5" span wing.
Required are a 2-stroke 40-.60 or 4-stroke 48- 80 engine
and a 4-channel radio.
When it's time to land, fly a normal landing pattern and
approach Keep a few clicks of power on until you are over
the runway threshold For your first landings, plan to land
slightly faster than stall speed and on the main wheels, as
this is the easiest way to land your Sportster Later, with a
little technique, you will find you can make slow, 3-point
landings
Have a ball! But always stay in control and fly in a safe
manner.
EASY SPORT" 40..............................................GPMA0150
The 59 2" span Easy Sport 40 lets you move up from
trainers with confidence While it has the ideal proportions
for easy, trainer-like low-speed flight, the model s light wing
F-15EAGLE.......................................................GPMA0438
Any pilot who's mastered a trainer can build and fly this 47"
span, jet-like sport model Its Auto-Lock'" construction
simplifies assembly, and two degrees of wing washout
provide reassuring flight stability But the F-15 is virtually
indistinguishable from a powerful dueled fan jet in the air'
Requires a 2-stroke 40-.50 engine and 4-channel radio
with 4 servos.
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