Aircraft Flight Trimming Chart - HITEC ECLIPSE 7 Owner's Manual

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 ...
1. Control Fly the model straight and level Use the transmitter trims for hands-off
neutrals
2. Control throws Fly the model and apply full
deflection of each control in
turn
3. Decalage Power off vertical dive
(crosswind if any). Release
controls when model vertical
(elevator trim must be neutral)
4. Center of Method 1: Roll into near
Gravity vertically-banked turn.
Method 2: Roll model inverted
5. Tip weight Fly model straight & level
(coarse upright. Check aileron trim
adjustment) maintains level wings. Roll
model inverted, wings level.
Release aileron stick.
6. Side Thrust & Fly model away from you into
Warped Wing any wind. Pull it into a vertical
climb, watch for deviations as
it slows down.
7. Up/Down Fly the model on normal path
Thrust 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
8. Tip weight Method 1: fly the model as per
(fine adjustment) 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)
Aircraft

Aircraft Flight Trimming Chart

Test Procedure
straight & level flight.
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
A. Model continues straight down
B. Model starts to pull out (nose up)?
C. Model starts to tuck in (nose down)?
A1. Nose drops
B1. Tail drops
A2. Lots of forward stick (down
B2. No forward stick (down elevator)
A. Model does not drop a wing.
B. Left wing drops.
C. Right wing drops.
A. Model continues straight up.
B. Model veers left
C. Model veers right
D. Model rolls right
A. Model continues straight up
B. Model pitches up (goes toward top of
C. Model pitches down (goes toward
A. Model comes out with wings level
B. Model comes out right wing low
C. Model comes out left wing low
(ACRO)
Section
Observations
elevator) required to maintain level
flight
required to maintain level flight, or
model climbs
model)
bottom of model)
– –
60
Adjustments
Change electronic subtrims or
adjust clevises to center
transmitter trims.
Change EPA (for high rates),
and Dual Rate settings (for
low rates) to achieve desired
responses.
A. No adjustment
B. Reduce incidence
C. Increase incidence
A. Add weight to tail
B. Add weight to nose
A. No adjustment
B. Add weight to right tip.
C. Add weight to left tip.
A. No adjustment
B. Add right thrust
C. Reduce right thrust
D. Put trim tab under left
wing tip *
A. No adjustment
B. Add down thrust
C. Reduce down thrust
A. No adjustment necessary
B. Add weight to left tip
C. Add weight to right tip