Top Flite TOPA0704 - Manual (Page 41)

41
Measure the high rate elevator throw fi rst…
❏
2. Hold a ruler vertically on your workbench against
the widest part (front to back) of the trailing edge of the
elevator. Note the measurement on the ruler.
❏
3. Move the elevator up with your transmitter and
move the ruler forward so it will remain contacting the
trailing edge. The distance the elevator moves up from
center is the “up” elevator throw. Measure the down
elevator throw the same way.
❏
4. If necessary, adjust the location of the pushrod
on the servo arm or on the elevator horn, or program
the ATVs in your transmitter to increase or decrease
the throw according to the measurements in the control
throws chart.
❏
5. Measure and set the low rate elevator throws and
the high and low rate throws for the rest of the control
surfaces the same way.
These are the recommended control surface throws:
ELEV
A
T
OR
HIGH RATE LOW RATE
3/4"
[19 mm]
11°
Up
3/4"
[19 mm]
11°
Down
1/2"
[13 mm]
7°
Up
1/2"
[13 mm]
7°
Down
1"
[ 25mm]
21°
1-1/2"
[38 mm]
30°
Up
1"
[ 25mm]
21°
Down
3/4"
[19 mm]
16°
Up
3/4"
[19 mm]
16°
Down
2-1/4"
[57mm]
22°
Right
2-1/4"
[57mm]
22°
Left
1- 3/4"
[44 mm]
17°
Right
1- 3/4"
[44 mm]
17°
Left
R
UDDER
AILER
ONS
FLAPS
NOTE : The throws are measured at the widest part of
the control surfaces.
A note about fl aps and mixing . When you deploy
the fl aps expect it to balloon a bit. It is not severe but
watch for it. We found that if you mix in 2 degrees of
down elevator when the fl aps are fully deployed that
the ballooning was eliminated.
BALANCE THE MODEL (C.G.)
More than any other factor, the C.G. (center of gravity/
balance point) can have the greatest effect on how
a model fl ies and could determine whether or not
your fi rst fl ight will be successful. If you value your
model and wish to enjoy it for many fl ights,
DO NOT
OVERLOOK THIS IMPORTANT PROCEDURE. A
model that is not properly balanced may be unstable
and possibly unfl yable.
At this stage the model should be in ready-to-fl y
condition with all of the components in place including
the complete radio system, engine, muffl er, propeller,
spinner and pilot.
❏
1. Use a fi ne-point felt tip pen to mark lines on the top
of wing on both sides of the fuselage 5-3/4" [146 mm]
back from the leading edge. Apply narrow (1/16" [2mm])
strips of tape over the lines so you will be able to feel
them when lifting the model with your fi ngers.
This is where your model should balance for the
fi rst fl ights. Later, you may experiment by shifting
the C.G. 5/8" [16 mm] forward or 3/8" [10 mm] back
to change the fl ying characteristics. Moving the C.G.
forward will improve the smoothness and stability,
but the model will then be less aerobatic (which
may be fi ne for less-experienced pilots). Moving the
C.G. aft makes the model more maneuverable and
aerobatic for experienced pilots. In any case,
start at
the recommended balance point and do not at any
time balance the model outside the specifi ed range.
❏
2. With the wing attached to the fuselage, all parts
of the model installed (ready to fl y) and an empty fuel
tank, place the model upside-down on a Top Flite CG
Machine,
™ or lift it upside-down at the balance point
you marked.
❏
3. If the tail drops, the model is “tail heavy.” If the
nose drops, the model is “nose heavy.” To fi nd out how
much weight is required to balance the model, place
incrementally increasing amounts of weight on the