Novak 3.5 from 4.5 Brushless

[Benh]

I raced a Novak 4.5 brushless this weekend for the first time since i bought it. It didn't seem to run to well, then it cut out. After checking all the connections that are perfect I took it apart. I also took apart my 6.5 motor to see if I could spot any differences and why it was making a funny tapping sound.

My 6.5 has black spacers around the shaft. My 3.5 doesn't. Is this correct?

Has anyone experience this problem before? The rating is 4.5 and the shaft was changed to a 3.5.

Any comments including "you're a noob but...." would be much appreciated!

Many thanks

[mark christopher]

poss yuor 3.5 is a sintered rotor and your over geared hence the shut down.

changing a 6.5 to a 3.5 rotor will not alter the performance unless it being changed from a no sintered to a sintered, the windings are in the can

[lazerboy]

Si senor, exactly correct. Was your motor or esc hot? if it was, you got saved a couple hundred dollars from novak. Being sensored it knows when the rotor is locked, over heating, spinning too fast, etc. use a 10 tooth or lower.

[PaulRotheram]

10 tooth?! the guy hasnt even posted what car he runs..

[lazerboy]

yes, a 10 tooth pinion and 65 spur. good for a 3.5.

[Zipper]

I was there with Mr Ben H on Sunday and can confirm:

• The soldering and wiring was spot on.... because I did it!
• The motor & speedo were not hot, so it wasn't thermalling
• The motor shaft seemed stuck. You would turn on, hit accelerate but nothing would happen. You would give the pinion a turn by hand and then re try the acceleration and the motor would turn. It would turn very slowly and not smoothly.
• We took the motor to bits and checked the bearings were free.
• We tried different sets of cells
• We compared the inside of the Novak brushless motor to that of another Novak brushless and found no differences other than the black spacers around the shaft.
• We wanted to try and swap the shafts around.... but the pinion was stuck on one of them!

We just can't work out what is wrong?

[Zipper]

Originally Posted by PaulRotheram

10 tooth?! the guy hasnt even posted what car he runs..

He was running an XXT.

[bert digler]

Originally Posted by Zipper

He was running an XXT.

was it damp weather ie damp sensor wire classic fault on brushless