Syma S107 Flybar Replacement (With Pictures)
I’ve had a bunch of emails lately from people asking me how to replace the flybar on their Syma S107. Usually when one person asks a question there are many more wordering the same thing. So, I decided to document the procedure here.
How do you know if you’re flybar even needs replacing?
Well, the most obvious answer here is if your flybar is broken. Even though the flybar is light and flexible, it can sometimes break in a crash. That’s not the only situation when your flybar might need replacing though. Sometimes the flybar will just become bent or twisted. This could cause the helicopter to shake or twitch in the air. It could also cause strange vibrations or buzzing. When this starts to happen it might be time to replace your flybar.
What parts are required to replace the Flybar
Note: you should be able to re-use 2 and 3 above as long as you don’t loose or break them.
What tools are required to perform the procedure?
Believe it or not, the only tool you need is a small rigid object. I use a slightly unbent paperclip.
Step 1: Disconnect the linkages
First we need to disconnect the two buckle linkages from the flybar. Image 1a below shows where those two buckles are located. To remove the buckles, use your fingers to slide them off as shown in image 1b. When you’re done, the two buckles should no longer be connected to the flybar. Instead they should be hanging down from the top blade grips as shown in 1c.
Step 2: Remove the flybar retainer pin
In order to remove the flybar, we have to first remove the retainer pin that holds it in place. This pin is located in the center of the flybar.
Okay, here’s where you’ll need to bring out your paperclip… To remove the flybar retainer pin, use the paperclip to push against it. Then, continue to feed the paperclip through until the pin falls out the other side. But, be careful not to lose the pin because we’ll need it later.
Step 3: Remove the Flybar
At this point your flybar should be sitting loose at the top of the rotor mast assembly.
And finally, simply lift the flybar up and off of the flybar assembly.
Step 4: Re-assemble with the new flybar
To re-assemble the flybar just perform the above steps in reverse order. Start by placing the flybar back on the rotor mast assembly and inserting the retainer pin. You may need to wiggle the flybar around a little in order to allow the pin to align with the holes on the flybar. Once everything is lined up, use a thumb nail to push the pin flush with the flybar.
Finally, re-attach the buckle linkages by pushing them on to the knobs on the flybar.
That’s it! You should now have a straight and balanced flybar. Take it for a spin and see how much better it flys.