| To Test For |
Test Procedure |
Observations |
Adjustment |
| 1. Control
neutrals. |
Fly model straight
and level |
Adjust the
transmitter trims for hands off straight and level flight |
Adjust clevises
to centre transmitter trims |
| 2. Control
throws. |
Fly model and
apply full deflection of each control in turn |
Check the response
of each control |
*Aileron Hi-rate:
3 rolls in 4 seconds.
*Lo-rate: 3 rolls in 6
seconds.
*Elevator Hi-rate: to give
smooth square corner.
*Lo-rate: to give a loop of
approx. 130' dia..
*Rudder Hi-rate: approx. 30-35
degrees for stall turns.
*Lo-rate to maintain knife-edge flight. -edge flight. |
| 3.
Decalage |
Power off vertical
dive. Release controls when model is vertical (elevator must be
neutral). |
A. Does the
model continue straight down?
B. Does the model start to
pull out (nose up) ?
C. Does the model start to
tuck in (nose down)? |
A. No
adjustment
B. Reduce
incidince
C. Increase
incidince |
| 4. Centre of
gravity |
Method 1: Roll
model into near vertically banked turn.
Method 2: Roll model
inverted. |
A. Nose
drops
B. Tail
drops
C. Lots of down elevator required
to maintain level flight
D. No down elevator required
to maintain level flight, or model climbs |
A. Add weight
to tail
B. Add weight to
nose
C. Add weight to
tail
D. Add weight to
nose |
| 5. Tip Weight (course
adjustment) |
Fly model straight
and level upright. Check that aileron trim maintains wings level. Roll model
inverted, wings level. Release aileron stick |
A. Model does
not drop a wing
B. Left wing
drops
C. Right wing
drops |
A. No adjustment
required
B. Add weight to right
tip
C. Add weight to left
tip |
| 6. Side
Thrust |
Fly model away
from you into any wind. Pull it into a vertical climb (watch for deviations
as it slows down). |
A. Model continues
straight up
B. Model veers
left
C. Model veers
right |
A. No adjustment
needed
B. Add right
thrust
C. Reduce right thrust (move
thrust line left) |
| 7. Up/Down
Thrust |
Fly model on
a normal path into any wind. Parallel to strip, at a distance of around 100m
from you (elevator trim should be neutral as per test No.3). Pull into a
vertical climb & neutralize elevator. |
A. Model continues
straight up
B. Model pitches up (goes towards
top of model)
C. Model pitches down (goes
towards bottom of model) |
A. No adjustment
needed
B. Add down
thrust
C. Reduce down
thrust |
| 8. Tip Weight (fine
adjustment) |
Method 1: Fly
model as per test No.6 and pull it into a reasonably small dia. inside loop
(1 loop only).
Method 2: Fly the model as
per test No.6 and push it down into an outside loop (1 loop only & fairly
tight). |
A. Model comes
out with wings level
B. Model comes out right wing
low
C. Model comes out left wing
low |
A. No adjustment
needed
B. Add weight to left
tip
C. Add weight to right
tip |
| 9.(a) Aileron
Differential Method 1: |
Fly the model
towards you, before it reaches you, pull it up into a vertical climb. Neutralize
controls, then half roll the model |
A. No heading
changes
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 |
A. Differential
OK
B. Increase
differential
C. Reduce
differential |
| 9.(b) Aileron
Differential 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 independent 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-edge 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 |
