GREAT PLANES Cosmic Wind Manuale di istruzioni - Pagina 18
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5. Use threadlocking compound to secure critical fasteners
such as the motor screws, wheel collar SHC screws and quick
connectors, etc.
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6. Add a drop of oil to the axles so the wheels will turn freely.
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7. Make sure all hinges are securely glued in place.
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8. Reinforce holes for wood screws with thin CA where
appropriate (servo mounting screws, control horn screws, etc.).
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9. Confi rm that all controls operate in the correct direction
and the throws are set up according to the manual.
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10. Make sure any servo extension cords you may have used
do not interfere with other systems (servo arms, pushrods, etc.).
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11. Balance your propeller (and spare propellers).
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12. Tighten the propeller nut and spinner.
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13. Place your name, address, AMA number and telephone
number on or inside your model.
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14. If you wish to photograph your model, do so before
your fi rst fl ight.
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15. Range check your radio when you get to the fl ying fi eld.
FLYING
The Cosmic Wind EP is a great-fl ying model that fl ies smoothly
and predictably. The Cosmic Wind EP does not, however,
possess the self-recovery characteristics of a primary R/C
trainer and should be fl own only by experienced R/C pilots.
CAUTION (THIS APPLIES TO ALL R/C AIRPLANES): If,
while fl ying, you notice an alarming or unusual sound such
as a low-pitched "buzz," this may indicate control surface
fl utter. Flutter occurs when a control surface (such as an
aileron or elevator) or a fl ying surface (such as a wing or
stab) rapidly vibrates up and down (thus causing the noise).
In extreme cases, if not detected immediately, fl utter can
actually cause the control surface to detach or the fl ying
surface to fail, thus causing loss of control followed by an
impending crash. The best thing to do when fl utter is detected
is to slow the model immediately by reducing power, then
land as soon as safely possible. Identify which surface
fl uttered (so the problem may be resolved) by checking all
the servo grommets for deterioration or signs of vibration.
Make certain all pushrod linkages are secure and free of
play. If it fl uttered once, under similar circumstances it will
probably fl utter again unless the problem is fi xed. Some
things which can cause fl utter are; Excessive hinge gap;
Not mounting control horns solidly; Poor fi t of clevis pin in
horn; Side-play of wire pushrods caused by large bends;
Excessive free play in servo gears; Insecure servo mounting;
and one of the most prevalent causes of fl utter; Flying an
over-powered model at excessive speeds.
Before you get ready to takeoff, see how the model handles
on the ground by doing a few practice runs at low speeds on
the runway. Hold "up" elevator to keep the tail wheel on the
ground. If necessary, adjust the tail wheel so the model will
roll straight down the runway. If you need to calm your nerves
before the maiden fl ight, bring the model back into the pits,
peak the battery and check all fasteners and control linkages
for peace of mind.
Remember to takeoff into the wind. When you're ready, point
the model straight down the runway, hold a bit of up elevator
to keep the tail on the ground to maintain tail wheel steering,
then gradually advance the throttle. As the model gains
speed decrease up elevator allowing the tail to come off the
ground. One of the most important things to remember with
a tail dragger is to always be ready to apply right rudder to
counteract motor torque. Gain as much speed as your runway
and fl ying site will practically allow before gently applying up
elevator, lifting the model into the air. At this moment it is likely
that you will need to apply more right rudder to counteract
motor torque. Be smooth on the elevator stick, allowing the
model to establish a gentle climb to a safe altitude before
turning into the traffi c pattern.
For reassurance and to keep an eye on other traffi c, it is a
good idea to have an assistant on the fl ight line with you. Tell
him to remind you to throttle back once the plane gets to a
comfortable altitude.
Take it easy with the Cosmic Wind EP for the fi rst fl ight,
gradually getting acquainted with it as you gain confi dence.
Adjust the trims to maintain straight and level fl ight. After fl ying
around for a while, and while still at a safe altitude with plenty
of battery, practice slow fl ight and execute practice landing
approaches by reducing the throttle to see how the model
handles at slower speeds. Add power to see how she climbs
as well. Continue to fl y around, executing various maneuvers
and making mental notes (or having your assistant write them
down) of what trim or C.G. changes may be required to fi ne
tune the model so it fl ies the way you like. Mind your battery
power level, but use this fi rst fl ight to become familiar with your
model before landing. With most electric planes it is best to
have a timer set on your transmitter or a separate timer with
an alarm to alert you when the battery may be getting low.
This will require a few fl ights before determining the maximum
fl ight time you can achieve with the batteries. This will prevent
the downwind auto motor cutoff over the end of the fl ying fi eld.
To initiate a landing approach, lower the throttle while on the
downwind leg. Allow the nose of the model to pitch downward
to gradually bleed off altitude. Continue to lose altitude, but
maintain airspeed by keeping the nose down as you turn onto
the crosswind leg. Make your fi nal turn toward the runway (into
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