11-28-2015, 09:05 AM | #1 |
Quarry Creeper Join Date: Oct 2015 Location: Wisconsin
Posts: 260
| Axial 27T and 2S
I toasted my 27t today on a 2s. Looking around it doesn't seem like it's uncommon, but I was at a slow crawl when it happened. I have 2.2 tires on it and i honestly haven't looked to see what the gearing is, but is it normal for a motor to fry in a situation like this? Or were the 2.2 tires a factor? They're rc4wd roklox. My dilemma is whether to get another one or not. I was planing on putting it in a 1.5 scaler still with the 2s. Will this prolong the life of it especially if i optimize gearing?
|
Sponsored Links | |
11-28-2015, 09:23 AM | #2 |
Quarry Creeper Join Date: Aug 2013 Location: Bullard TX
Posts: 256
| Re: Axial 27T and 2S
If you didn't change your gearing that could have been the problem because it got too hot. I had the same 27t on 2s and it got too hot to touch in just a few minutes then I changed the gearing enough to keep it cool and it lasted a while.
|
11-28-2015, 10:05 AM | #3 |
Quarry Creeper Join Date: Mar 2015 Location: Woodland
Posts: 279
| Re: Axial 27T and 2S
Throw away motors are throw away motors
|
11-28-2015, 03:00 PM | #4 |
Quarry Creeper Join Date: Oct 2015 Location: Wisconsin
Posts: 260
| Re: Axial 27T and 2S
Lol screw it then. I rather burn down one of these than a 1:1 any day. Made me laugh when I saw the smoke lol Sent from my SM-G920R4 using Tapatalk |
11-28-2015, 06:50 PM | #5 |
I wanna be Dave Join Date: Apr 2014 Location: North Carolina
Posts: 2,254
| Axial 27T and 2S X2. And changing tire size has the same effect as changing gearing. If you swap for bigger tires, you need to gear down to compensate or risk overheating your motor. Conversely, if you drop your tire size, you will lose top end unless you gear up to compensate. |
11-28-2015, 07:04 PM | #6 |
Quarry Creeper Join Date: Oct 2015 Location: Wisconsin
Posts: 260
| Re: Axial 27T and 2S
Here's a total noob question. When talk about rear ratio on here is the ratio determined by the motor gear and spur gear or does one account for every gear in the drive line? Sent from my SM-G920R4 using Tapatalk |
11-28-2015, 07:36 PM | #7 | |
I joined the Band! Join Date: Dec 2014 Location: Earth
Posts: 1,188
| Re: Axial 27T and 2S Quote:
Tire size changes your tire/gear roll-out ratio, it's similar in effect to changing the gear ratio and changing the spur/pinion or axle ring/pinion ratio may be necessary to compensate for a drastic change in tire size. But tire size doesn't actually change your gear ratios. | |
11-28-2015, 07:38 PM | #8 | |
I wanna be Dave Join Date: Apr 2014 Location: North Carolina
Posts: 2,254
| Re: Axial 27T and 2S Quote:
What ultimately matters is the final drive ratio -- i.e., the number of times the motor has to spin to move the truck a given distance -- which takes into account all the gear changes at each stage (spur/pinion, tranny gearing, t-case if you have one, axle gearing) plus tire size. When talking about gearing, people usually talk only about spur/pinion because it's the easiest to change and provides the greatest flexibility for changing the final drive ratio in either direction. But talking only about spur/pinion ratio ignores differences in tire size and axle gearing (on rigs where axle gearing can be changed), both of which impact the final drive ratio. And 2-speed trannies add yet another gearing variable into the mix. So when you're looking at spur/pinion on your own rig or comparing to other people's setups on similar rigs, it's important to know the rest of the setup to get the full picture. And if you are even thinking about comparing spur/pinion gearing across platforms, you'd also need to take into account differences in tranny and axle gearing. Here's some fun reading on gearing: http://www.axialracing.com/blog_posts/1073905374 Hope that helps! | |
11-28-2015, 08:26 PM | #9 |
I wanna be Dave Join Date: Apr 2014 Location: North Carolina
Posts: 2,254
| Axial 27T and 2S
FWIW - Eric and I are saying the same thing. Some people use the term "final drive ratio" to refer to gearing combined with tire circumference, and others use the term "rollout" to refer to the combination of gearing and tire circumference. Either way, the concepts are the same.
Last edited by new2rocks; 11-28-2015 at 08:29 PM. |
11-28-2015, 08:31 PM | #10 |
Quarry Creeper Join Date: Oct 2015 Location: Wisconsin
Posts: 260
| Re: Axial 27T and 2S
Thanks guys, I've built and worked on a bunch of 1:1 vehicles and even though concepts are the same the lingo is something to get used to and also the electric motor side of things Sent from my SM-G920R4 using Tapatalk |
Axial 27T and 2S - Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
HH 27t vs axial 27t | Fatman489 | Electronics | 22 | 05-15-2014 11:26 AM |
Should I bother? (27t axial to 27t HH) | Chisholm | Electronics | 4 | 02-04-2014 01:11 PM |
| |