Post on 29-Dec-2021
transcript
TB Model 120mm Viper Jet
OWNERS MANUAL
Thanks for purchasing one of our fina ARFs. It is very
straightforward to assemble, but it is not meant for
first-time builders. You are expected to have certain
basic modeling skills...if not, GET HELP.
This airframe was designed, stock, for power up to 1300
watts or so, and scale-like flying. If you want to use a lot
more power, or fly very hard, you should think about
beefing it up a bit.
You could easily push this model above 150mph, given
enough power(or a turbine engine), but the design was
not set up for that without modifications. Get
experienced help, and build accordingly.
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Cut open the two servo bays. Use a nice new blade.
Glue the hinges into place. The best way is to remove
each hinge, then put two pins into the centerline of each
hinge, then put the hinges into place, then remove the
pins, then glue them. This keeps the hinges from sliding
too far into one surface or another.
Organize your wing servo covers, cut the holes for the
control horns.
Fit your servos to the covers, using the provided blocks.
You can modify the blocks as you see fit to suit your
servos.
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Add appropriate extensions as needed, tape these
extensions for safety, use 2 pieces of hardwood for the
servo.
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Fit the aileron servos into place. Use a wire with a hook
on the end to fish the servo lead out the hole in the wing
root.
Drill holes for the servo cover mounting screws.
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Fit the pushrods and use them to determine the location
of the control horns.
Shoot a bit of CA accelerator onto the spots where the
horns will go.
Tack glue the horns into place with CA.
Drill holes for the mounting bolts.
Screw the horns into place.
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Glue the wingtip into place.
Fit the wing tubes to the wings.
Test fit the wings onto the fuselage, add the carbon
fiber antirotation pins. Adjust the wing alignment
carefully. Use screw to install the wing to the fuselage,
then the wing can be removed.
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Carefully fit the stabs and the stab tube. When satisfied
with alignment, then remove any paint from the mating
surfaces on the fuse, and epoxy the stabs into place.
Glue the elevator hinges into place with CA.
Fit the elevator servo. Use the same techniques as the
wing servos, don’t forget the extension for it.
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Cut open the servo bay for rudder. Use a nice new blade.
Carefully fit the Vertical and the vertical tube. When
satisfied with alignment, then remove any paint from the
mating surfaces on the fuse, and epoxy the vertical into
place. Fit the Rudder servo. Use the same techniques as
the wing servos, don’t forget the extension for it.
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Install the nose gear and strut.
Install a servo for nosegear steering.
Link up the steering with monofilament fishing line. Use
nyrod tubes, glued at one end as shown, to add some
pressure to keep the steering cables taut as the gear
retracts, so they do not tangle with the nosegear. Study
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the picture for a few minutes.
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Install the nose gear retract door.
Glue the upper tray into position. Do a good job here, as
your batteries will be held on this tray.
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Install the canopy to the fuselage
Spray the aft end of the tail cone silver for better
appearance.
Mount up your fan, screw it to the rails and then mount
the fan cover.
Fit the tail cone to the fan, and make a hole for the ESC
or motor wires.
The fan hatch is fit in place with screw. You can add a
little clear tape if it makes you feel better, too.
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Add your receiver and wiring.
Balance is 2CM forward of the main spar.
Throws are:
Elevator 1cm up, 1cm down
Ailerons 1cm up, 1cm down
Rudder as much as you can get
Nosegear steering, 1/4” each direction.
Flaps, 1” down.
The Viper jet is very easy to fly, just don’t try to horse it
off the ground, let it gain speed before climbing out.
Landings, keep some power on, and fly it down onto the
runway. Do not try to “flare” it, there is no reason to stall
the plane, just fly it down onto the runway. Don’t attempt
to land it with no power, you will likely tip stall it and
kill it. Good luck and happy flying.
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