Vortex-RC VT-AllRounder, Instructional Manual, Page: 34 / 35

Differenti
al
Method
1: pull it up into a vertical
climb. Neutralize controls,
then half roll the model B. Heading change
opposite to direction of
roll commands (ie.
heading veers to models
& your left after right roll).
C. Heading changes in
direction of roll command C. Reduce differential
9.(b)
Aileron
Differenti
al
Method
2: Fly the model on a normal
pass and do 3 or more
rolls A. Roll axis on model
center line
B. Roll axis off to same
side as roll command (ie.
right roll, roll axis off right
wing tip)
C. Roll axis off to opposite
side of model as roll
command A. Differential OK
B. Increase differential
C. Reduce differential
10.
Dihedral Fly model on normal pass
and roll into knife-edge
flight, maintain altitude
with top rudder (do this
test in both left & right
knife-edge flight) A. Model has no tendency
to roll out of knife-edge
flight
B. Model rolls in direction
of applied rudder
C. Model rolls in opposite
direction in both tests A. Dihedral OK
B. Reduce dihedral
C. Increase dihedral
11.
Elevator
alignment
(for
models
with
independ
ent
elevator
halves) Fly model as in test #6 and
pull it up into an inside
loop. Roll inverted and
repeat the above by
pushing it up into an
outside loop A. No rolling tendency
when elevator applied
B. Model rolls in same
direction in both tests
C. Model rolls in opposite
direction in both tests A. Elevators are in correct
alignment
B. Elevator halves misaligned.
Either raise one half or lower the
other half
C. One elevator half has more
throw than the other (model rolls
to the side with the most throw).
Reduce throw on one side or
increase throw on the other
12.
Pitching
in
knife-edg
e flight Fly model as per test no.
10 A. There is no pitching up
or down
B. The nose pitches up
(the model climbs
laterally)
C. Nose pitches down
(model dives laterally) A. No adjustment needed
B. Alternate cures:
1. Move the CG aft
2. Increase wing incidence
3. Add down trim to ailerons
C. Reverse the above
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