Extreme Flight RC EXTRA 300 EXP V2, Assembly Manual

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This completes the assembly of the 70 inch Extra 300EXP V2. As a final step clean the
entire aircraft with glass cleaner, then apply a coat of spray-on wax and buff the finish to
a high gloss. My favorite product for this is Eagle One Wet Wax AS-U-DRY, available in
the automotive section of most Wal-Marts, K-marts, Sears, Targets, etc. People often ask
me at trade shows how I get the planes to look so shiny, this is my secret. You may wish to
apply all of your graphics before applying the coat of wax.
Set-up and trimming
Besides basic assembly, this is the most important part of preparing your airplane for
flight. It can also be the most time consuming, but once your plane is properly dialed in
you will agree it was time well spent.
The center of gravity range for the 70 inch Extra 300 begins at 5.25
” from the
leading
edge of the wing measured at the root and extends back ¾” from this
point. CG is
determined with the Extra in the upright position. One of the best ways to dial in the
proper CG for your aircraft is the 45 degree line test. Fly the aircraft in front of you from
left to right (or right to left if you prefer) at full throttle. Pull the aircraft into a 45 degree
up line and establish this line. Roll the aircraft inverted, neutralize the elevator and pay
close attention to what the plane does. Ideally the plane will continue on this line for
several hundred feet before it starts to slowly level off. If the airplane immediately drops
the nose and dives toward the ground it is nose heavy. If it begins to climb inverted toward
the gear it is tail heavy. There is no need to have the Extra excessively tail heavy to
perform 3D maneuvers.
Control surface throws
I highly recommend that you purchase a throw meter that measures in degrees. There are
several units available commercially. These units are a great aid in set-up and definitely
beat the “that looks about right” method.
For any type of precision flying, surfaces that
travel equal distances are a must. The following control surface travels are what I use on
my own Extra. These are a good starting point, but are by no means the only way to set up
the Extra. Start here and then adjust to fit your own preferences and style of flying.
Elevator: 8-10 degrees low rate, 18-20% exponential; all you can get high
rate, 60-65% exponential
Aileron: 15 degrees low rate, 30-40% exponential; 38-40 degrees high rate,
65-70% exponential
Rudder: 20 degrees low rate, 50% exponential; all you can get for high
rate, 80-90% exponential.
Again, this is just a starting point. Adjust to your liking.
Thanks again for your purchase of the Extreme Flight RC 70 inch Extra 300EXP V2
ARF. I hope you enjoy assembling and flying yours as much as I have mine.
See you at the flying field!
Chris Hinson
Extreme Flight RC
www.modellmarkt24.ch; www.modellmarkt24.de