❏
2. With the wing attached to the fuselage, all parts of the
model installed (ready to fly) and an empty fuel tank, place
the model on the CG Machine or lift it at the balance point
you marked.
❏
3. If the tail drops, the model is “tail heavy” and weight must
be added to the nose to balance. If the nose drops, the model
is “nose heavy” and weight must be added to the tail to
balance. If possible, relocate the battery pack and receiver to
minimize or eliminate any additional ballast required. If
additional weight is still required and you are using a glow
engine, nose weight may be easily added by using a “spinner
weight” (GPMQ4645 for the 1 oz. [28g] weight, or GPMQ4646
for the 2 oz. [57g] weight). If spinner weight cannot be used or
is not enough, use Great Planes (GPMQ4485) “stick-on” lead.
To find out just how much weight is needed, begin by placing
incrementally increasing amounts of weight on the fuselage
where needed until the model balances. Once you have
determined the amount of weight required, it can be
permanently attached. A good place to add stick-on nose
weight is inside the fuel tank compartment.
If tail weight is required, it may be added by cutting open the
bottom of the fuselage and gluing it permanently inside.
Note: Do not rely upon the adhesive on the back of the lead
weight to permanently hold it in place. Over time, fuel and
exhaust residue may soften the adhesive and cause the
weight to fall off. Use #2 sheet metal screws, RTV silicone
or epoxy to permanently hold the weight in place.
❏
4. IMPORTANT: If you found it necessary to add any
weight, recheck the C.G. after the weight has been installed.
❏
1. With the wings level, have an assistant help you lift the
model by the engine propeller shaft and the bottom of the
fuselage under the trailing edge of the fin. Do this several times.
❏
2. If one wing always drops when you lift the model, it means
that side is heavy. Balance the airplane by adding weight to the
other wing tip. An airplane that has been laterally balanced
will track better in loops and other maneuvers.
No matter if you fly at an AMA sanctioned R/C club site or if you
fly somewhere on your own, you should always have your
name, address, telephone number and AMA number on or
inside your model. It is required at all AMA R/C club flying sites
and AMA sanctioned flying events. Fill out the identification tag
on page 28 and place it on or inside your model.
Follow the battery charging instructions that came with your
radio control system to charge the batteries. You should
always charge your transmitter and receiver batteries the
night before you go flying, and at other times as
recommended by the radio manufacturer.
CAUTION: Unless the instructions that came with your
radio system state differently, the initial charge on new
transmitter and receiver batteries should be done for
fifteen hours using the slow-charger that came with the
radio system. This will “condition” the batteries so that the
next charge may be done using the fast-charger of your
choice. If the initial charge is done with a fast-charger the
batteries may not reach their full capacity and you may be
flying with batteries that are only partially charged.
Charge the Batteries
Identify Your Model
PREFLIGHT
Balance the Model Laterally
23
Summary of Contents for Giant Big Stir
Page 32: ......
