TO TEST FOR

TEST PROCEDURE

OBSERVATIONS

ADJUSTMENTS

1. Control Neutrals

Fly the model straight and level

Use Transmitter trims for hands

Adjust clevises to centre

off straight and level flight

Transmitter trims

2. Control Throws

Fly model and apply full

Check response of each control

Aileron :- Hi-rate, 3 rolls in 3 to 4

deflection of each control in

seconds. Lo-rate, 3 rolls in 6

turn

seconds

Elevator :- Hi-rate to give a

smooth square corner, Lo-rate

to give a loop of approximately

130 feet diameter

Rudder :- Hi-rate approximately

30-35 degrees, for stall turns,

Lo-rate to maintain knife edge

flight.

3. Centre of Gravity (Method 1)

Roll model into a near

A. Nose drops

A. Add weight to tail

vertically banked turn

B. Tail drops

B. Add weight to nose

(Method 2)

Roll model inverted

A. Lots of down elevator

A. Add weight to tail

required to maintain level flight

B. No down elevator required

B. Add weight to nose

to maintain level flight, or

model climbs

4. Decalage

Power off vertical dive, cross

A. Model continues straight down

A. No adjustment required

wind (if any). Release controls

when model is vertical,

B. Model starts to pull out,

B. Reduce incidence

(elevator must be neutral).

(nose up).

C. Model starts to tuck in,

C. Increase incidence

(nose down).

5. Tip Weight (course

Fly the model straight and level,

A. Model does not drop a wing

A. No adjustment required

adjustment)

upright. Check aileron trim

B. The left wing drops

B. Add weight to right tip

maintains wings level. Roll the

C. The right wing drops

C. Add weight to left tip

model inverted, wings level.

Release aileron stick

6. Elevator Alignment. (for

Fly model away from you and

A. No rolling tendency when

A. Elevators in correct

models with independent elevator

into any wind. Pull it into an inside

elevator applied

alignment

Halves)

loop or vertical climb, roll it inverted

B. Model rolls in same

B. Elevator halves misaligned.

and repeat by pushing it into an

direction in both tests

Either raise one half or lower

outside loop or vertical climb

the other

C. Model rolls in opposite

C. One elevator half has more

directions in both tests

throw that the other, (the model

rolls to the side with the most

throw). Reduce throw on side

with the most throw or increase

throw on the other

Trimming starts here in earnest

1. Tip Weight (Final adjustment)

Fly the model high into the wind

A. Neither wing drops on pulling

A. No adjustment required

either coming towards you or

out.

or going away from you, smoothly

push the model into a vertical

B. The right wing drops on pulling

B. Add weight to the left wing

dive, pull out sharply and watch

out.

tip.

for a wing dropping.

C. The left wing drops on pulling

C. Add weight to the right wing

out

tip

2. Dihedral

Fly the model straight and level

A. The model does not roll.

A. No adjustment required

into any wind, apply rudder and

watch for any tendency for the

B. The model rolls in the direction

B. Reduce dihedral

model to roll.

of the applied rudder. (Proverse

a. Test in both directions.

roll)

b. Make changes in increments

of no more than 1/8" at a time

C. The model rolls in the opposite

C. Increase Dihedral

c. Don't worry about the nose

direction to the applied rudder

pitching down or up.

(Adverse roll)

3. Side Thrust

Fly the model away from you,

A. Model continues straight up

A. No adjustment required

(During tests re-trim with rudder

into any wind. Pull it smoothly

B. Model veers left

B. Add right thrust

until a straight vertical is achieved,

into a vertical climb going at

C. Model veers right

C. Reduce right thrust

then add side thrust to the value of

least to normal manoeuvre height

half the rudder trim that was

(watch for deviations to the left

needed. Zero the rudder trim)

or right as it slows down)

(Go back and re-test after

adjusting)

4. Up/Down Thrust

Fly the model cross wind, at a

A. Model continues straight up

A. No adjustment required

distance of around 100m from

B. Model pitches up, (goes

B. Add down thrust

you, (elevator trim should be

towards the top of the model)

neutral as per test No 3), pull

C. Model pitches down, (goes

C. Reduce down thrust

it into a vertical climb and

toward the bottom of the model)

neutralize the elevator, (watch

for any deviations up or down

as it slows down)

5. Aileron Differential

Fly the model level and into

A. The model does not veer

A. No adjustment required

(Set the model up with 12 Degrees

any wind, going away from

sideways.

up and 11 to 12 Degrees down

yourself. Pull it up into a

as a starting point.)

45 Degree climb and roll to

B. The model's path veers to the

B. Increase differential, increase

the right.

right.

the up throw on both ailerons

(After adjusting, try again

in both directions)

C. The model's path veers to the

C. Decrease differential, increase

left.

the down throw on both ailerons.

6. Pitching in knife-edge flight

Fly the model on a normal pass

A. There is no pitch up or down

A. No adjustment required

(Method 1)

and roll into knife-edge flight,

B. The nose pitches up, (the

B. Alternative cures :-

maintain height with top rudder,

model climbs laterally)

1. Move the C of G aft

(do this test in both left and

2. Increase wing incidence

right knife-edge flight)

3. Add down trim to ailerons

C. The nose pitches down, (the

C. Reverse the above

model dives laterally)

6a. Knife-edge tracking

Fly the model on a normal pass

A. The model does not pitch

A. No adjustment required

(Method 2)

and roll into edge-edge flight,

up or down

maintain height with top rudder,

(do this test in both left and

B. The model pitches to the canopy

B. Lower both Ailerons slightly

right knife-edge flight)

in both knife-edges.

Approximately 2 turns

C. The model pitches to it's bottom

C. Raise both Ailerons slightly

in both knife-edges

approximately 2 turns

D. The model pitches in opposite

D. Use mixing from rudder to

directions in each knife-edge

elevator to fix the problem.

7. Power off Tracking (Test #1)

Fly the model level into any

A. No roll to either side

A. No adjustment required

wind, pull the power off and

watch for any roll off to either

B. The model rolls left

B. Mix 2% to 3% right aileron

side

to low throttle, the amount

enough to neutralize the roll.

C. The model rolls right

C. Mix 2% to 3% left aileron

to low throttle, the amount

enough to neutralize the roll.

Test #2

Fly the model high at a distance

A. The model shown no

A. No adjustment required

of approximately 100m into or

tendency to roll

across wind but sideways to

B. The model rolls to it's left