Electric vesla - motor options

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Kratonwatch

Kratonwatch

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Hey everyone,

I finally pulled the trigger on the electric vesla and I’m planning my build in my head. I already have a spare Hobbywing max5 G2 ESC and I’m wondering what motor and gearing to pair with it. I plan on going 8s, so I can share batteries with my Kraton 8s. I know this rig will be heavy, so I’m wondering if I go 650kv for this build or 800kv.

also, is there a mathematical way to figure out motor size & gearing to figure out where I should be while maintaining decent temps?

Thanks!
 
If I had to guess, I’d think the 800kv would put you in the right RPM range on 8S. Make sure to install motor fans. It looks like they sell a battery plate for longer batteries in case you need it.

This app is good if you have an iPhone:
https://apps.apple.com/app/id898565895
 
W
Dure16 said:
If I had to guess, I’d think the 800kv would put you in the right RPM range on 8S. Make sure to install motor fans. It looks like they sell a battery plate for longer batteries in case you need it.

This app is good if you have an iPhone:
https://apps.apple.com/app/id898565895
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Where Or how would I find the differential gear ratios?
 
im runnin
Kratonwatch said:
How are your temps? I plan on running 800kv with the stock 16t at first but may gear up to 18/19. I don’t want to overheat the motor though
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im running 12s as i get temps around 145 max but im running the kraken dual fans it stays in the 120s early 130s long runs i get 145
 
Kratonwatch said:
finally pulled the trigger on the electric vesla and I’m planning my build in my head. I already have a spare Hobbywing max5 G2 ESC and I’m wondering what motor and gearing to pair with it. I know this rig will be heavy, so I’m wondering if I go 650kv for this build or 800kv. Also, is there a mathematical way to figure out motor size & gearing to figure out where I should be while maintaining decent temps?
Click to expand...
Don't know whether you got the roller, v or the SBK...not that that point really matters, as the end-result is still the same. Anyway, before Kraken switched to the 650kv motor 12S version (which uses an 18T pinion), they were selling the RTR with buyers choice of 650kv or 800kv. I don't know if the two options came with different pinion gears, or if it was the same 18T pinion no matter what. Before that (still the 12S version, but only for a short period after switching from the 8S version), buyers had a choice of 800kv or 1100kv. For that one, I don't remember what the pinion was. And, going back to the 'original' (8S only), it came with an 1100kv.

With all that info, I used an RC speed-gear calculator. Using the current 12S 650kv w/ 18T pinion, I wanted to determine what your pinion would be needed to achieve the same estimated speed when running an 800kv on 8S (since that's what I've decided to get, and knowing that this is how Kraken was previously selling it). By the calculator's determination, it should be a 22T pinion. Since I'm less interested in 'speed', and more interested in 'runtime', as well as keeping temps down, I ordered a 21T pinion to start. I also ordered the dual fan setup (I'll replace the fans with higher-quality fans when the included fans fail), to help control temps.
 
Ninth Island RC said:
Don't know whether you got the roller, v or the SBK...not that that point really matters, as the end-result is still the same. Anyway, before Kraken switched to the 650kv motor 12S version (which uses an 18T pinion), they were selling the RTR with buyers choice of 650kv or 800kv. I don't know if the two options came with different pinion gears, or if it was the same 18T pinion no matter what. Before that (still the 12S version, but only for a short period after switching from the 8S version), buyers had a choice of 800kv or 1100kv. For that one, I don't remember what the pinion was. And, going back to the 'original' (8S only), it came with an 1100kv.

With all that info, I used an RC speed-gear calculator. Using the current 12S 650kv w/ 18T pinion, I wanted to determine what your pinion would be needed to achieve the same estimated speed when running an 800kv on 8S (since that's what I've decided to get, and knowing that this is how Kraken was previously selling it). By the calculator's determination, it should be a 22T pinion. Since I'm less interested in 'speed', and more interested in 'runtime', as well as keeping temps down, I ordered a 21T pinion to start. I also ordered the dual fan setup (I'll replace the fans with higher-quality fans when the included fans fail), to help control
Click to expand...
I got one of the last SBKs and I’m really excited.
I’m going to grab the 19 & 21 tooth pinions and see how they work. Temps are a big concern of mine, so I’ll slowly gear up until the motor starts to get too hot.

Also, doesn’t their transmission upgrade come with 25t pinion and like a 57t spur? I have to check their site

I’m currently researching servos so if you have any advice I’m all ears 👂
 
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Ninth Island RC said:
What? No 20T? LOL...just kidding. Just like me, I'm sure you'll "figure it out".
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Did your fans come with an indicated voltage? I was hoping to run them at 8.4v but they look more like 7.4v fans. Their website does not say what voltage you can run them at.

I run 12v fans on my Kraton with a piggyback 3s battery, but was trying to avoid a 3rd battery in this application.
 
Kratonwatch said:
Did your fans come with an indicated voltage? I was hoping to run them at 8.4v but they look more like 7.4v fans. Their website does not say what voltage you can run them at.

I run 12v fans on my Kraton with a piggyback 3s battery, but was trying to avoid a 3rd battery in this application.
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They plug directly into the Rx, so I'm assuming they're at least 7.4V. since I plan to set the BEC to 7.4V, that's good enough for me.
 
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