HITEC Eclipse 7 Pro - Manual (Page 42)

40
Aircraft Flight Trimming Chart
The following chart may be used to systematically set up and trim a model for straight flight and aerobatic maneuvers. Please
note that for best results, trimming should be done in near-calm conditions. Before you decide to make a change, be sure to try
the test several times before making adjustments. If any changes are made, go back through the previous steps and verify that
they are not also affected. If they are, make further adjustments as necessary.
To test for Test Procedure Observations Adjustments
1. Control neutrals Fly the model straight and level Use the transmitter trims for
hands-off
straight & level flight.
Change electronic subtrims or
adjust clevises to center
transmitter trims.
2. Control throws Fly the model and apply full
deflection of each control in turn
Check the response of each
control
* Aileron high-rate: 3 rolls in 4
seconds;
low-rate: 3 rolls/6 sec
*Elevator high-rate: to give a
smooth
square corner; low-rate gives
approx.
130 ft diameter loop
*Rudder: high-rate 30-35 for stall
turns;
low rate maintains knife-edge
Change EPA (for high rates),
and Dual Rate settings (for low
rates) to achieve desired
responses.
3. Decalage Power off vertical dive(crosswind
if
A. Model continues straight down
B. Model starts to pull out (nose
up)?
C. Model starts to tuck in (nose
down)?
A. No adjustment
B. Reduce incidence
C. Increase incidence
4. Center of Gravity Method 1: Roll into near vertical-
lybanked
turn.
Method 2: Roll model inverted
A1. Nose drops B1. Tail drops
A2. Lots of forward stick (down
elevator)
required to maintain level flight
B2. No forward stick (down eleva-
tor) required
to maintain level flight, or model
climbs
A. Add weight to tail
B. Add weight to nose
5. Tip weight
(coarse adjustment)
Fly model straight & level upright.
Check aileron trim maintains level
wings. 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
B. Add weight to right tip.
C. Add weight to left tip.
6. Side Thrust & Warped
Wing
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
D. Model rolls right
A. No adjustment
B. Add right thrust
C. Reduce right thrust
D. Put trim tab under left wing
tip *
7. Up/Down Thrust Fly the model on normal path into
any wind, parallel to strip, at a
distance of around 100 meters
from
you (elevator trim should be
neutral
as per Test 3). Pull it into a
vertical
climb & neutralize elevator
A. Model continues straight up
B. Model pitches up (goes toward
top of model)
C. Model pitches down
(goes toward bottom of model)
A. No adjustment
B. Add down thrust
C. Reduce down thrust
8. Tip weight
(fine adjustment)
Method 1: fly the model as per
Test
6 and pull into a reasonably small
diameter loop (one loop only)
Method 2: fly the model as per
Test
6 and then push into an outside
loop (one 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 necessary
B. Add weight to left tip
C. Add weight to right tip