What Does “Trimming” Mean?
Trimming means adjusting your controls so the glider:
- Flies straight hands-off
- Maintains a steady glide
- Doesn’t climb or dive on its own
A properly trimmed glider is easier to fly and stays airborne longer.
Step 1: Start With Correct CG
Never trim before setting CG.
- Battery installed
- CG at forward recommended position
- Control surfaces centered
Trimming can’t fix a bad balance.
Step 2: Initial Glide Test
In calm air:
- Launch gently at half throttle
- Cut power
- Observe the glide
You want:
- Shallow descent
- No pitching up or down
- Smooth, steady airspeed
Step 3: Elevator Trim
Adjust elevator until:
- The glider doesn’t climb or dive
- Elevator trim is close to neutral
If you need lots of trim → recheck CG.
Step 4: Aileron & Rudder Trim
Fly straight into the wind and check:
- Does it drift left or right?
- Does it roll during glide?
Correct with small trim adjustments only.
Step 5: Fine-Tuning for Intermediate Pilots
Once basic trim is set:
- Slightly reduce elevator throw
- Add exponential
- Adjust camber for conditions
Test one change at a time.
Common Trimming Mistakes
- Trimming in windy air
- Trimming with incorrect CG
- Making multiple changes at once
- Ignoring glide tests
Quick Trim Checklist
- CG verified
- Elevator near neutral
- Smooth hands-off glide
- Straight tracking into wind
Final Thoughts
A trimmed RC glider feels almost effortless to fly.
If your glider feels “busy” or tiring, trimming — not skill — is usually the missing piece.