HITEC Optic 6 - Manual (Page 29)

GLOSSARY
GLOSSARY - Page 57 Helicopter Flight Trimming Chart - Page 56
Helicopter Flight Trimming Chart
RPM Stick Primary Corrective Action
High Below 1/2 Decrease hovering throttle
Low Below 1/2 Decrease hovering pitch
Perfect Below 1/2 Decrease hovering throttle, decrease hovering pitch
High 1/2 stick Increase hovering pitch, decrease hovering throttle
Low 1/2 stick Decrease hovering pitch, increase hovering throttle
Perfect 1/2 stick Don't touch a thing!
High Above 1/2 Increase hovering pitch
Low Above 1/2 Increase hovering throttle
Perfect Above 1/2 Increase hovering pitch, increase hovering throttle
Want more Keep 1/2 Decrease hovering pitch, then increase hovering throttle
Want less Keep 1/2 Increase hovering pitch, then decrease hovering throttle
Adjusting Hovering Pitch and Hovering Throttle
This procedure assumes helicopter is trimmed for hovering. Trimming must be done in near-calm conditions.
Repeat tests several times before making adjustments. If any changes are made,
go back over the previous steps and verify, or further adjust as necessary.
The abbreviations used with the Optic are defined below alphabetically.
Related pages are given in parenthesis following the definition.
A
ACGL
Acrobatic/Glider aircraft menu (15)
ADIF Aileron differential. Ailerons move more to one
side than other (31)
AILV Differential elevator servos, for 3-D aerobatics (39)
ATL Adjustable Travel Limit. Limits throttle trims to
only the throttle idle position.
(built in to your system)
A->R Aileron Rudder mixing (36)
C
CAMB
A function which droops or raises the entire
trailing edge of a wing. (32)
COPY Data copy: command used to copy one memory
to another (11)
CROW Airbrake function (37)
CURSOR Button used to step through menus (9)
D
D/R
Dual rate: switch-controlled function reduces
control travels. (27)
DATA Editing keys change numbers (9)
E
ELVN
Elevon function combines ailerons & elevators for
tailless models. (34)
EPA End Point Adjust. Function that adjusts the servo t
ravel at the left and right sides. (27)
EXP Exponential function, reduces sensitivity around
neutral (28)
E->F Elevator Flap mixing (36)
F
FAIL
Failsafe function moves servos to preset locations
if interference is received. (41)
FLPN Flaperon function gives the ailerons a flap
function. (30)
FLPT Flap travel function. (30)
G
Gear
Landing gear control switch. (8)
GYRO Gyro setting menu (51)
H
HELI
Helicopter settings menu. (45)
HOLD Throttle hold function holds the throttle in a near-
idle position (used for autorotation). (51)
I
INH
Inhibit. Function will not operate
L
L/U
Indicates Left or Up stick motion
LAND Landing function (33)
Lock Lock throttle button (9)
M
MAS
Master channel in mixer (38)
M.SEL Model select menu (11)
N
NOR
Normal helicopter swashplate (1 servo each for
elevator, aileron, pitch. (12)
O
OFF
Function or Switch in OFF position.
ON Function or Switch in ON position.
P
PPM
Pulse-Position Modulation,
also known as "FM". (14)
PCM Pulse-Code Modulation. (14)
PMX Programmable mixer. Mixing between
arbitrary channels. (38)
PTCV Pitch curve function (53)
Q
QPCM
Pulse-Code Modulation. (14)
R
R/D
Indicates Right or Down stick motion
REV Reverse. Servo operating direction
switching function. (29)
REST Reset model memory (15)
RVMX Revolution mixing (54)
R->T Rudder Throttle mixing (50)
S
S/W SEL
Select on-off switches for different functions (39,53)
SFT.N Negative transmit shift direction (13)
SFT.P Positive transmit shift direction (13)
SLV Slave channel in program mixer (38)
STCK Choose Mode of transmitter. (13)
STRM Subtrim function used to adjust
servo neutrals. (28)
SWAH Swash type (12,54)
T
T.CUT
Throttle cut function used to kill engine
without moving trims (29)
THCV Throttle curve function (52)
TIME Timer/Stopwatch function (14)
V
VTAL
V-tail function combines the
elevators and rudder. (35)
Numerical
120'
Helicopter swashplate, 120° (12,54)
To test for... Test Procedure Observations Adjustments
1. RVMX mixing
- Up settings
(Part 1)
Fly the model straight and
level into the wind at 100 ft
altitude, lower pitch to 0° Observe rotation as helicopter descends
A. No rotation
B. Model rotates counterclockwise
C. Model rotates clockwise
A. None
B. Add right rudder trim
C. Add left rudder trim
2. RVMX mixing
- Up settings
(Part 2)
Bring the helicopter into hover,
add full pitch and ascend 75 ft Observe rotation as helicopter ascends
A. No rotation
B. Model rotates counterclockwise
C. Model rotates clockwise
A. None
B. Increase UP RVMX mix
C. Decrease UP RVMX mix
3. RVMX Down
mixing settings
Begin Down RVMX mixing
with same number as UP
mix. From inverted flight
(top of loop, or mid-point of
roll, or inverted part of split-S),
add full negative pitch Observe rotation as helicopter ascends
A. No rotation
B. Model rotates clockwise
C. Model rotates counterclockwise A. No adjustment
B. Increase Down RVMX mix
C. Decrease Down RVMX mix