Extreme Flight EXTRA260 Manuale utente
67” / 1.7M
8lbs / 3.6 Kg
T-motor AM670
6s 4000-5000mah
ARF ASSEMBLY GUIDE
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Please read the following paragraphs before beginning assembly of your aircraft!
THIS IS NOT A TOY! Serious injury, destruction of property, or even death may result from the misuse of this
product. Extreme Flight RC is providing you, the consumer with a very high quality model aircraft component
kit, from which you, the consumer, will assemble a flying model. It is beyond our control to monitor the finished
aircraft you produce. Extreme Flight RC will in no way accept or assume responsibility or liability for damages
resulting from the use of this user assembled product. This aircraft should be flown in accordance to the AMA
safety code(or the appropriate model code for your region). It is highly recommended that you join the Acade-
my of Model Aeronautics in order to be properly insured, and to operate your model at AMA sanctioned flying
fields only. If you are not willing to accept ALL liability for the use of this product, please return it to the place of
purchase immediately.
Extreme Flight RC guarantees this kit to be free of defects in materials and workmanship for a period of 30
DAYS from the date of purchase. All warranty claims must be accompanied by the original dated receipt. This
warranty is extended to the original purchaser of the aircraft kit only.
Extreme Flight RC in no way warranties its aircraft against flutter. We have put these aircraft through the most
grueling flight tests imaginable and have not experienced any control surface flutter. Proper servo selection
and linkage set-up is absolutely essential. Inadequate servos or improper linkage set up may result in flutter
and possibly the complete destruction of your aircraft. If you are not experienced in this type of linkage set-up
or have questions regarding servo choices, please contact us at info@extremeflightrc.com or 770-887-1794.
It is your responsibility to ensure the airworthiness of your model.
Special notes on the 67” Extra 260 aircraft:
The 67” Extra 260 is super-high-performance 3D and XA aerobatic machine. It is perfectly matched to the
T-Motor AM670 motor and AM116 ESC with T-motor 18x8 carbon prop. This is the configuration we used in
development testing.
Be sure to use a premium, very high quality servo, such as the Theta 989, Savox SV-1261MG, or MKS HV-747.
Please read through this guide before beginning assembly to familiarize yourself with the tools and materials.
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1. Installing control horns: All of the control horns on your aircra install in the same way. Locate the
correct control horn for each surface. Prep the horns by lightly scung the gluing area (the part which
will go into the control surface) with sandpaper or an emery board. Test t the horn and cover plate
without glue to make sure it goes all the way into the surface as shown. To permanently install the horn,
place medium CA glue into the slot, insert the horn fully and rmly into the slot, and then add a few
drops of thin CA for extra insurance as shown. Clean up any spilled CA with acetone. Allow to dry.
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2. Installing main landing gear: Attach the carbon landing gear to the fuselage with screws as shown,
use blue Loctite (or other medium-strength threadlocker) on these screws. Note that there is a
“front” to the landing gear and when installed, they sweep slightly forward.
Locate the fairings, test t them, and then premanently attach them to the landing gear (not the
fuselage) using a generous amount of “Goop” or other rubberized adhesive. Allow to dry.
Locate the axles, attach to the landing gear as shown with washer and locking nut. Note there is
a at spot on the axle to engage the wheel collar set screw. Install the wheel and wheel collar, use
loctite on the collar set screw. Install the wheel pant with screw and loctite as shown.
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3. Installing the horizontal stab and elevators: Test t the stabilizer without glue. Make sure it fully
inserts into the fuselage as shown. Make sure you have it right-side-up. When you have the sta-
bilizer perfectly tted, glue it in place with thin CA glue as shown. Clean up any spilled CA with
acetone.
Locate the tail ller piece. Fit it as shown. When it is perfectly aligned, apply thin CA glue as
shown. Clean up any spilled CA with acetone.
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4. e rudder is retained with a wire. Place the rudder in position and install the wire from the bottom as
shown.
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5. Install the tailwheel as shown using hex-head wood screws. Install the phillips-head wood
screw as shown into the rudder to hold the tailwheel tiller. Make sure the tailwheel can easily
swing with the rudder. e tailwheel assembly retains the rudder hinge wire in place.
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6. Attach servo wire extensions to your servos and use tape or a wire lock to make sure they do not be-
come disconnected in ight. Install the servos in the positions and orientations shown. Center your
servos using your radio or a servo tester, then install your arms. Install the linkage as shown using
screws, washers , locking nuts, and tapered spacers as shown.
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7. e 67” Extra 260 is congured for easy installation of the T-motor AM670 power system. Oth-
er systems will install similarly. Mount the motor X-mount to the rewall as shown, use Loctite.
Attach the motor to the X-mount as shown. Mount the ESC to the mounting pad on the bottom
of the motor box with zip-ties as shown. Neatly run the wires and retain them with zip ties.
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8. Attach the cowl to the fuselage with screws, use loctite. Here we have added optional Extreme
Flight decorative aluminum washers. Adjust and tighten the prop mount and make sure you have
a small amount of clearance (approx 2mm) between the spinner backplate and cowl. NOTE: if you
are new to high performance aerobatic aircra, your motor points 2.5 degrees to the RIGHT to
balance torque and prop forces. is is by design and is correct.
NOTE: For safety, never connect your ight battery on your workbench with the prop installed.
Take the time to remove the prop when connecting the battery for setup work.
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