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3. Tube-in-tube (nyrod). Bracing every few inches is highly
recommended. Inner tube should be totally enclosed in
outer tube.
4. Hardwood dowel, 3/8" O.D. bracing every six (6) to ten
(10) inches is highly recommended.
Hinges should be rated heavy-duty and manufactured for
Giant-Scale use primarily. Homemade and original design
hinges are acceptable if determined to be adequate for the
intended use.
Clevis (steel, excluding heavy-duty ball links) and
attachment hardware should be heavy-duty 4-40 threaded
rod type. 2-56 threaded size rod is acceptable for some
applications (e.g. throttle). Clevis is to have lock nuts and
sleeve or spring keepers.
Propeller tips should be painted or colored in a visible and
contrasting manner so as to increase the visibility of the
propeller tip arc.
CHECK LIST
During the last few moments of preparation your mind
may be elsewhere anticipating the excitement of the first
flight. Because of this, you may be more likely to overlook
certain checks and procedures that should be performed
before the model is flown. To help avoid this, a check list
is provided to make sure these important areas are not
overlooked. Many are covered in the instruction manual,
so where appropriate, and refer to the manual for
complete instructions. Be sure to check the items off as
they are completed (that's why it's called a check list! ).
1.
Fuelproof all areas exposed to fuel or exhaust
residue such as the wing saddle area or the engine
spacer if needed.
2.
Check the C.G. according to the measurements
provided in the manual.
3.
Be certain the battery and receiver are securely
mounted in the fuse. Simply stuffing them into place
with foam rubber is not sufficient.
4
Extend your receiver antenna and make sure it has
a strain relief inside the fuselage to keep tension off
the solder joint inside the receiver.
5.
Balance your model laterally as explained in the
instructions.
6.
Use thread locking compound to secure critical
fasteners such as the screws that hold the
carburetor arm (if applicable), Screw-Lock pushrod
connectors, etc.
7.
Add a drop of oil to the axles so the wheels will
turn freely.
8.
Make sure all hinges are securely glued in place.
9.
Reinforce holes for wood screws with thin CA
where appropriate (servo mounting screws, cowl
mounting screws, etc.).
10. Confirm that all controls operate in the correct
direction and the throws are set up according to
the manual.
11. Make sure there are silicone retainers on all the
clevises and that all servo arms are secured to the
servos with the screws included with your radio.
12. Secure the connections between servo wires and
Y-connectors or servo extensions, and the
connection between your battery pack and the
on/off switch with vinyl tape, heat shrink tubing or
special clips suitable for that purpose.
13. Make sure any servo extension cords you may have
used do not interfere with other systems (servo
arms, pushrods, etc.).
14. Make sure the fuel lines are connected and are
not kinked.
15
Balance your propeller (and spare propellers).
16. Tighten the propeller nut and spinner.
17. Place your name, address, AMA number and
telephone number on or inside your model.
18. Cycle your receiver battery pack (if necessary) and
make sure it is fully charged.
19. If you wish to photograph your model, do so before
your first flight.
20. Range check your radio when you get to the flying field.
The Extra 300S ARF is a great-flying model that flies
smoothly and predictably. The Extra 300S ARF does not,
however, possess the self-recovery characteristics of a
primary R/C trainer and should be flown only be
experienced R/C pilots.
Fuel Mixture Adjustments
A fully cowled engine may run at a higher temperature than
an un-cowled engine. For this reason, the fuel mixture
should be richened so the engine runs at about 200 rpm
below peak speed. By running the engine slightly rich, you
will help prevent dead-stick landings caused by overheating.
32
FLYING
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