Mount the wing, Ground check and range check, Takeoff – Great Planes Evader EDF Sport Jet EP ARF - GPMA1800 User Manual

Page 22: Hand launch

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Mount the Wing

Mount the wing with the two 3 x 15mm Phillips screws and
fl at washers. With the canopy off, don’t forget to connect the
aileron servo to the receiver through the cockpit.

Ground Check and Range Check

Always perform an operational ground check of your radio

before the fi rst fl ight of the day following the manufacturer’s
instructions that came with your radio. This should be done

once with the motor off and once with the motor running
at various speeds. If the control surfaces do not respond
correctly, do not fl y! Find and correct the problem fi rst. Look
for loose servo connections or broken wires, corroded wires
on old servo connectors, or poor receiver antenna routing.

Takeoff

First, it’s a good idea to use a fl ight timer to alert you when
it’s time to land—you always want reserve battery power

because—especially on the fi rst fl ight—more than one
landing attempt may be necessary. Throughout testing
we set our timer to four minutes (of motor run time). This
should provide an additional minute of run time for landing
approaches. For your fi rst fl ight it might even be a good idea
to set your timer to three minutes.

In order of preference (with the bungee-launch being the

most preferable), the Evader may be bungee-launched with
the included bungee system, hand-launched by an assistant
or hand-launched by the pilot. It is acceptable to hand-launch
the Evader, but it must be thrown just about as hard as
possible to acquire suffi cient velocity. However, sometimes
the harder a person throws an object the less control they
may have possibly causing a bad launch. This is amplifi ed
by the fact that there is no perfect way to grab the Evader.

Additionally, while it is possible for the pilot to hand-launch

the Evader, for obvious reasons it is preferable to have an
assistant launch it for you (this way, your hands will already
be on the transmitter). We have performed several hand-
launches, so if this is your preference here’s the best way:

Hand Launch

Have your assistant (or yourself) hold the model by the
bottom of the fuselage just behind the wing. Use your pinky
fi nger and the fi nger next to it to steady the plane and level
the wing.

As you always should before every fl ight, double-check that

the controls are responding properly and in the correct
direction
, then arm the motor and run it up for a second to
make sure it is making full power. Make sure your launch is
directly into any prevailing wind. Inform your assistant of your
intentions and make sure he acknowledges, then apply full
throttle. Under control, your assistant should run for several
steps, then throw the plane into the air at about a 40° angle
doing his best not to release it into a roll.

Expect the Evader to briefl y lose altitude before it gains
enough airspeed to establish a climb. At this point you
should be able to pull full, high-rate elevator to get the nose
up. Always be ready on the ailerons to correct any unwanted
roll and keep the wing level—this all will happen within a few
seconds.

At this point you’re in the clear and the model will climb as it

rapidly continues to gain speed.

1. Throw the Evader
about as hard as you
can at approximately
a 30-40º angle.

2. Expect the Evader to briefly
dive before it gains enough
velocity to establish a climb.
You should be able to pull full
elevator to keep it airborne.

3. Now you’re in the clear.
Allow the Evader to gain
speed and begin climbout.

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