Blade Balancing

In a perfect world, both of your blades have the same weight and the same center of gravity (COG).

You need to check that both blades have the same weight and COG, otherwise, you’ll get vibrations in the helicopter.

I have found two methods of doing this on YouTube:

Here are the steps to follow:

  1. Determine which blade is heavier.  You can use the blade balancer or a scale to determine which one is heavier.
  2. Find the center of gravity of the heavier blade  and put a tiny mark at that center of gravity (CoG).
  3. Place the blades side-by-side and transfer the CoG mark from the heavier blade to the lighter blade.
  4. Take the lighter blade and put it on the balancer and line up the tick mark with the center line on the balancer.
  5. We need to add tape to the end of the lighter blade so that it balances using the same CoG of the heavier blade.
    1. At this point, both blades now have the same center of gravity.  BUT one blade is still lighter than the other one.
  6. Attach both blades together, end-to-end.  Put them on the glass or balancer.   You’ll notice the heavier blade sinks lower.
  7. Add tape to the lighter blade at the CoG mark from step 3.  By adding tape to the mark, you are not changing the CoG.  Continue adding tape until both blades are the same weight.



BLADE BALANCING ON THE CHEAP

Determining the Center of Gravity (COG) – step 2

Stealth Blades for TREX500

Blade Balancing – step 7

 


BLADE BALANCING USING A PROPER BALANCER

 

 

Dial the brass wheel until the bubble in the level is centered.  You are ‘zeroing’ the balancing tray.

NOTE:  when using this blade balancer, you MUST tape the red triangular supports to your table.   If accidentally move a leg and its no longer parallel with the other leg, it will throw the black balancing tray off.  Try it.  With nothing on the balancing tray, push and pull the legs together and you’ll see the tray move around.

Find the center of gravity for the first blade – step 2

Get both blades to have the same weight – step 7