Is this normal for an Brushless Out-Runner??

[Rudy]

Hi everyone,

Getting ready to start into this Hobie I bought my first plane and it is a RICCS Socata TB-20 Trinidad RTF at a very affordable price of C $184.97.

One weird thing that is happening with the motor (RICCS 2822 Brushless Out-Runner), it's that whenever I go quickly from complete stop to full throttle it could happen to the Rotor to come almost out from the Stator, making friction to each other and eventually stopping. Putting it back to the normal position and it works perfectly again without frictions between magnets. What is consistently happening though, it is that as much throttle I give it, the pulling made by the propeller makes the rotor to move away forward from the stator in proportion to the throttle. If a go from zero to full progressively, chances are that the rotor don't get enough far from the stator to come out from the axe and start to friction and stop.

I just have the feeling this is not normal, and I want to ask to you guys, the experts, If am I wrong or not, and if yes, what are the possible solutions.

Here is video because an image worth thousand words.

http://www.youtube.com/watch?v=fGIF98ptBxo

[RichR]

Add collar or C-clip onto the shaft at the rear of the motor. If the shaft is grooved you need a clip, if it extends, add a collar and tighten the set screw.

[Rudy]

Thank you for answering Rich. Yes, the end of the shaft is grooved and there is a C-clip that fits on the groove, but the shaft extends as you can see on the video and it is avoid to completely come off by that C-clip.

So, you said the solution it is to add a collar. I'm sorry to appear so ignorant but even though I believe to understand what are you meaning by a "collar", could you please give me a web link to images where I can see what exactly you mean by a collar?

[RichR]

Hi Rudy,

If the shaft is secure on the rear end of the motor, you might need to tighten the set screw on the front of the motor bell. The collar is shown in the image below:

http://www.maxxprod.com/mpi/tips_files/ss13.jpg

[RichR]

When you pull on the bell assembly does the shaft move forward with the assembly, if it does, the shaft isn't fixed on the back end and needs to be secured.

[Rudy]

Thanks again Rich.

Here is another closer picture of this motor. We can see a C-Clip at the end of the shaft and the two screws (black). The one closer to chassis seems to be there to tied the bearing. And the one closer to the propeller is there to tied down the Rotor to the shaft. But none of them avoid the shaft to extend trough the bearing hole which is only stopped to come completely out by the C-clip.

I think I still missing something. :no:

[RichR]

Oh, your pic makes things clear, just put a retention collar like the one in the picture and you'll be set! You can find them at the hobby shop. :)

[Rudy]

Ok Rich I will try it that way. One last thing to ask (for the moment you know, I'm rookie).

What is your recommendation as hobby shop?

[shrek]

Ted's is a good place to start.They are friendly and won't sell you anything that you don't need or are not ready to fly.

[beats]

+1 on teds

[Rudy]

Thanks Stephan and Frank for your recommendation. I will definitively visit them soon.