Motors

Muddy Mudskipper · May 19, 2012, 09:50:14 PM

I am trying to figure out the motor requirements. So it was 27T but now is 17T brushless. Does that include anything in between 17T and 27T? Could you run a 20-23T brushed?

Gorden · May 19, 2012, 10:03:51 PM

Quote from: Muddy Mudskipper on May 19, 2012, 09:50:14 PM
Does that include anything in between 17T and 27T? Could you run a 20-23T brushed?

The 20-23t brushed motors might be faster then the 17t brushless motor so it might be a problem to do it all the time. I'm sure someone in the club can come up with a 27T brushed motor for you cheep or even free.

Gorden

gotnitro · May 19, 2012, 10:14:34 PM

I have 1 or 2 I don't need.

valk · May 19, 2012, 10:35:48 PM

What about the 27 from the club car. Was it motor or esc that blew up. I have abtelin 17.5 you can use if your esc does brushless

Blake · May 19, 2012, 11:11:39 PM

If you already own a 20-23T brushed motor, go ahead and throw it in your car. It will be fine for now.

Blake

Muddy Mudskipper · May 20, 2012, 12:24:49 AM

I was asking because at this time I can't afford to make the jump to brushless. My car came with a stock motor that is a 27T but it seems painfully slow. I am pretty sure I set it up right. I was just wondering about what was allowed.
I feel like I am back at school it's a lot to learn. Lipo's, brushless, sensors, temp guns and crazy chargers. The last time I had an RC you just plugged the battery in and turned a dial....

Hell when I borrowed the loaner it was the first time I used a ESC and the first time I've drivin in a decade. LOL I feel old now.

Gorden · May 20, 2012, 12:42:18 AM

Quote from: Muddy Mudskipper on May 20, 2012, 12:24:49 AM
I was asking because at this time I can't afford to make the jump to brushless. My car came with a stock motor that is a 27T but it seems painfully slow. I am pretty sure I set it up right. I was just wondering about what was allowed.
I feel like I am back at school it's a lot to learn. Lipo's, brushless, sensors, temp guns and crazy chargers. The last time I had an RC you just plugged the battery in and turned a dial.... Hell when I borrowed the loaner it was the first time I used a ESC and the first time I've drivin in a decade. LOL I feel old now.

I believe 27T brushed motor with the right gearing is ok to start on. So try for a FDR of around 6.8 to start If you go below 6 your going to toast the motor

what size is the spur gear on the car?

valk · May 20, 2012, 02:25:58 AM

Painfully slow is fine until you can get around the track with minimal bumps. 27t 6.5:1? i have my 8t at 10:1.. and it only gets warm?

Muddy Mudskipper · May 20, 2012, 12:46:35 PM

My gear ratio right now is 8.35 (stock). 19T pinion and 61T spur gear. I could pull the motor out of my wrecked buggy to see what the pinion is and I have a lot of different Tamiya spur gears. I take it I should try lowering the gear ratio?

Gorden · May 20, 2012, 01:16:38 PM

Quote from: Muddy Mudskipper on May 20, 2012, 12:46:35 PM
My gear ratio right now is 8.35 (stock). 19T pinion and 61T spur gear. I could pull the motor out of my wrecked buggy to see what the pinion is and I have a lot of different Tamiya spur gears. I take it I should try lowering the gear ratio?

I would run it for about 3 mins and if it is still not to hot gear it up bit

valk · May 20, 2012, 01:21:03 PM

from gear chart, 25-27 pinions would work with your spur well. if it fits that is. i have a 27/30 48p if you wanna try.

Blake · May 20, 2012, 01:44:31 PM

Gord is in the ballbark with the suggested 6.8 final drive ratio. By my math, that would be a 23t pinion for you. I'm sure someone has one that you can borrow to try it out.

Hope to see you next Sunday!

Blake

Gorden · May 20, 2012, 02:06:00 PM

Quote from: Blake on May 20, 2012, 01:44:31 PM
Gord is in the ballbark with the suggested 6.8 final drive ratio. By my math, that would be a 23t pinion for you. I'm sure someone has one that you can borrow to try it out.

Hope to see you next Sunday!

Blake

23 to start is what I would do

Muddy Mudskipper · May 20, 2012, 07:41:51 PM

Ok so I ran into Glen today and showed him my car. Apparently my 27T motor is not the kind of 27T motors you (we) use. I have 27T Mabuchi that came with my car. So it is completely different.

ok So Glen was nice enough to provide me with a bunch of pieces that when engineered together somehow create a motor (Just kidding thanks a lot Glen) with a somewhat confusing demo. Just when I think I begin to understand.......LOL. Ok so I do have a motor thanks everyone. After that I guess it's figuring out the gearing.

I will see you all Sunday and hopefully I will have this figured out.

rcshadow · May 20, 2012, 10:11:43 PM

Ya sorry about the rushed crash course on the motor. I have taken a picture cause after I left I forgot to put one of the brushes back in so you could see it again. I have taken a photo and will see if it attaches here so you can see what i meant. Like I said before if you dont get it done dont worry just show up on Sunday and I am sure we can get it going in no time. But change the comm that I gave you and install the new brushes if you get a chance. The more prepared you are able to be by the time you get to the track the less time it will take to get you up and running.

Good Luck

[attachment deleted by admin]