Mechanical brake / Castle Neu problem

[Ryu James]

yeah, that sucks bro. frustrating huh. you can cut into the endbell but i wouldnt. i did this and once you start it never stops and your motor looks like crap. plus you usually have to cut away way more than you had anticipated. i would get a another piece of 3mm alum or carbon and make the spacer thicker......or buy a tekno conversion kit.....at least that is what i would do next time if you plan to run mechanical brakes. Mike sells the kits on his site or you can get them from impaktrc.com. good luck.

[starscream]

3mm isn't much
An easy solution to this is to run slightly bigger gears.
What vehicle are you using. What is the current pinion spur? 46/15?
it sounds like 48/16 would fix you up.

You can always run your 17T pinion and set your throttle end point down to 85 or 90% until you get new gears or make a small spacer.

[Ryu James]

cdis,
i was going to suggest that you get a larger spur instead of just trying to make it work with a larger pinion. just take what your ideal gearing is and divide the 2 numbers to get the gear ratio. for example 15/48 is ratio of 3.2 so if you need to go to 50t spur then figure what pinion will get you close to the same ratio and your setup will be very close to what you wanted in the first place. eg. a 16/50 ratio is 3.12. just go up in spur size and this will require a larger pinion also and the result will be a mesh that works with your current spacer. if you already have a 54t spur on then i dont know what to tell you. i havent seen mod1 gears much larger than that.....although i am sure you could find one somewhere.

Yea it is a bit frustrating.

I agree starscreem, 3mm isn't much, but it should be just enough to allow the brake pads to clear the front of the motor. 3mm Alu is just what I have on hand. The problem would be to make up something as accurately as Mike has done for the brake spacer.

The car is a Kyosho ST-RR. It's running the stock 50T spur gear at the moment. I was thinking about getting a bigger spur gear, but no one in Australia carries parts for the ST-RR yet... Should a got an RC8T lol.

Anyway, yea, if I could, I would run a bigger pinion and maybe the 16 or 17t pinion, whichever one fits best.

This is only an issue until the Medusa arrives. I've ordered the 1600kv motor, so I'm hoping that I'll be able to use the 17T pinion with 7s1p A123 and get some decent amp draw and run times.

Thanks Ryu, I didn't know that formula for working out the gear ratio :D

[starscream]

From your picture, it looks like you could go with a smaller brake disc. The smallest disc I know if is the Losi 8ight rear brake disc. A smaller diameter disc my give you the extra 3mm you need.

A smaller diameter brake disk wouldn't help would it? What would be more helpful would be either thinner brake pads? Then the motor would fit "over" the top of the end of the screw that holds the brake pads together, which you can see is touching the front of the motor, and hindering it from moving any further toward the spur.

Righto, so I decided to bulk up the RCM spacer a little to use with my CC NEU until the medusa arrives.

It's pretty rough looking, but it works - can pinions as small as 12T.

[magman]

I wouldn't cut the can...it will surely void your warrantee if not mistaken. Another smaller spacer may be in order or have Mike make you a new one that is a tad wider.

Haha yea no way I was going to cut the can. Those little bits of Alu work fine and there's no play in the mounting, so I'll live with that until the Medusa arrives.

The CC Neu is insane on 7s1p A123s and 12T pinion! :D

Hello again everyone :D

I have a question regarding the gearing on my setup now. Im currently running the 12t pinion with the stock 50T spur, which performance wise is working perfectly. Similar, but faster to my nitro car, and no crazy wheel ballooning etc.

I measured the temp of everything after my last run, and found that my motor was fairly hot when compared to the ESC and batts.

The ESC was about 30C, the batts were 33C but the motor was just under 50C (degrees in Celsius).

I looked up the thread on motor/speed/batt temps which has

Hot motor, cool controller, cool batteries = undergeared
Cool motor, hot controller, hot batteries = overgeared

So I guess my setup is currently under geared. Does that mean I need to go up a couple of pinion sizes to "gear up", or does it mean that I need to go down a few?

Thanks guys :D

[jnev]

That is correct. To gear up, you can either get a pinion gear with more teeth, or a spur gear with less teeth. Both will have the same effect.

Hmm, that's a bit sad, as my run times were awesome with the 12t lol. Thanks for the quick answer tho, I'll try the 13-15t pinions and see how I go.

I just wish my 1600kv medusa would arrive already! 2200kv is way overkill for 7s a123s lol

[SpEEdyBL]

50C is about the coolest temps you can get on any motor after a run. There is nothing to be concerned about until you exceed 175F or about 80C.