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To Test For
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Test Procedure
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Observations
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Adjustment
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1. Controls neutral
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Fly
model straight and level
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Adjust
the transmitter trims for hands off straight and level flight
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Adjust
clevises to center transmitter trims
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2. Control throws
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Fly
model and apply full deflection of each control in turn
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Check
the response of each control
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*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.
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3. Decalage
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Power
off vertical dive. Release controls when model is vertical (elevator must
be neutral).
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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)?
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A. No
adjustment
B. Reduce incidence
C. Increase incidence
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4. Center of gravity
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Method
1: Roll model into near vertically banked turn.
Method 2: Roll
model inverted.
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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
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A. Add
weight to tail
B. Add weight to
nose
C. Add weight to
tail
D. Add weight to
nose
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5. Tip Weight (course
adjustment)
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Fly
model straight and level upright. Check that aileron trim maintains wings
level. Roll model inverted, wings level. Release aileron stick
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A.
Model does not drop a wing
B. Left wing
drops
C. Right wing drops
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A. No
adjustment required
B. Add weight to
right tip
C. Add weight to left
tip
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6. Side Thrust
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Fly
model away from you into any wind. Pull it into a vertical climb (watch for
deviations as it slows down).
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A.
Model continues straight up
B. Model veers
left
C. Model veers
right
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A. No
adjustment needed
B. Add right
thrust
C. Reduce right
thrust (move thrust line left)
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7. Up/Down Thrust
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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.
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A.
Model continues straight up
B. Model pitches up
(goes towards top of model)
C. Model pitches
down (goes towards bottom of model)
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A. No
adjustment needed
B. Add down
thrust
C. Reduce down
thrust
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8. Tip Weight (fine
adjustment)
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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).
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A.
Model comes out with wings level
B. Model comes out
right wing low
C. Model comes out
left wing low
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A. No
adjustment needed
B. Add weight to
left tip
C. Add weight to
right tip
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9.(a) Aileron Differential
Method 1:
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Fly the
model towards you, before it reaches you, pull it up into a vertical climb.
Neutralize controls, then half roll the model
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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
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A.
Differential OK
B. Increase
differential
C. Reduce
differential
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9.(b) Aileron
Differential Method 2:
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Fly the
model on a normal pass and do 3 or more rolls
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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
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A.
Differential OK
B. Increase
differential
C. Reduce
differential
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10. Dihedral
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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)
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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
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A.
Dihedral OK
B. Reduce
dihedral
C. Increase
dihedral
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11. Elevator
alignment (for models with independent elevator halves)
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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
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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
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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
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12. Pitching in
knife-edge flight
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Fly
model as per test no. 10
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A.
There is no pitching up or down
B. The nose pitches
up (the model climbs laterally)
C. Nose pitches
down (model dives laterally)
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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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