WATT AGE PT-19 CORNELL EP ARF, Instructions For Final Assembly

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STEP 5:  INSTALLING THE FLIGHT BATTERY

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Slide your flight battery through the front cockpit cutout and onto the

battery tray.  Push the flight battery as far forward as possible, then
secure it into place, using the Velcro

®

 strap.

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IMPORTANT

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  When you balance the airplane later, you may need

to move the flight battery forward or aft.  The location shown is only
a general location and may differ depending on equipment used.

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Cut out each of the decals and carefully apply them to the airframe, using the box cover photos for reference.

STEP 6:  APPLYING THE DECALS

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IMPORTANT

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  It is critical that your airplane be balanced correctly.  Improper balance will cause your airplane to lose control

and crash!

Center of Gravity Location:

1-7/8" - 2-1/8" (48mm-54mm) back from the leading edge of the wing, measured at the fuselage sides.

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WARNING

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  This is the recommended C/G range.

FOR TEST-FLYING WE SUGGEST YOU START WITH THE C/G AT 2" (51MM), then move it farther back as you become
familiar with the flying characteristics of the airplane.  It is not recommended that the C/G be located any farther back
than 2-1/8" (54mm).

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IMPORTANT

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  Balance the PT-19 Cornell EP ARF with the 

flight battery installed and the airplane fully assembled.

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Install the wing onto the fuselage.

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Apply two short pieces of masking tape onto the 

top

 of the wing, 

2" (51mm) back from the leading edge, measured at the

fuselage sides.

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Turn the airplane upside down, place your fingers on the masking tape, and carefully lift the airplane.  If the nose of the airplane

falls, the airplane is nose heavy.  To correct this, move the flight battery back far enough to bring the airplane into balance.  If the tail
of the airplane falls, the airplane is tail heavy.  To correct this, move the flight battery forward far enough to bring the airplane into
balance.  When balanced correctly, the airplane should sit level or slightly nose down when you lift it up with your fingers at the
C/G location.

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Once you have flown and become familiar with the flight characteristics of the airplane,  the C/G can be moved fore or aft within

the C/G range to change the flight performance.  Moving the C/G back will cause the airplane to be more responsive, but less stable.
Moving the C/G forward will cause the airplane to be more stable, but less responsive.

DO NOT FLY THE AIRPLANE BEYOND THE RECOMMENDED BALANCE RANGE OR AN

UNCONTROLLABLE CRASH COULD RESULT!

SECTION 15: BALANCING THE PT-19 CORNELL EP ARF

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Ruler

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Masking Tape

YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES: