Specifications
4. Mark the balance point with a felt tip pen. The balance point is the point where the center
line on the balance beam touches the leading edge of the blade tip.
5. Repeat for the other blade.
6. Stack the rotor blades, then insert a bolt through the hole to align the blades perfectly.
Check if the CG of the blades match within 1/16th of an inch (1.5mm).
7. If the CGs are close enough, go to Step two: Matching weight
8. Determine which blade has CG farthest away from the mounting bolt hole.
9. Move the CG of the blade closer to the bolt hole by placing placing 1-2 inches of electrical
tape on the underside of the blade next to the leading edge near the bolt hole.
10. Measure the CG on this blade again and mark the new CG location.
11. Go to step 6
13.3.1.2. Step two: Matching the weight
1. Determine which blade holder posts fit your blades, then mount them on the balancing
tray.
2. Make sure the balancing tray balances evenly when nothing is on the tray. If necessary,
use the setscrews to balance the tray.
3. Mount the blades on the blade holder posts and make sure both blades balance and are
perfectly horizontal.
4. If the blades do not balance, put a small strip of electrical tape on the underside of the
lighter blade at the CG point next to the leading edge of the blade.
5. Add or remove tape on the lighter blade at the CG point until the blades balance.
13.3.1.3. Step three: Optimizing tape usage (optional)
1. If you applied tape to only one blade or less than seven inches of tape were used in steps
one and two, you can skip this step.
2. If one blade has a large amount of tape near the bolt hole and the other blade also has a
large amount of tape on the CG, then you should definitely perform this step.
3. On the blade with tape near the bolt hole, remove all the tape.
4. On the blade with tape at the CG, remove the tape and discard half of the tape. Reapply
the other half of the tape to the blade but at a point halfway between the CG and the tip.
5. Go back to Step One: Matching the CG and rebalance. The blades should require less
tape to balance this time.
13.3.2. Blade grip tension adjustment
Helicopter and Transmitter Setup
103