Eboard constructing noob. Advice?

[Bails]

Hey pretty new here on the forum but was just looking for some advice on a relatively simple eboard build.
If anyone could recommend any parts that they think will do the job that would be of great help. Ill be riding around relatively hilly ground. That said a low kv motor would do the job better as i've seen, but also advice on the gearing would be very helpful as i'm not to sure on what to go with, in terms of tooth numbers.

http://www.hobbyking.com/hobbyking/store/__18180__Turnigy_Aerodrive_SK3_6364_213kv_Brushless_Outrunner_Motor.html
That is the motor im currently looking at, the kv rating does go lower in this range, i think down to like 160kv.

2 3cell 5000mah lipos purchased from HK.

http://www.hobbywing.com/product_show.asp?id=239
I have seen this esc mentioned around, is it recommended over a hobbyking model such as a trackstar?

For trucks/wheels a pair of Paris trucks with some blank flywheels seems like the way to go. Being based is Australia shipping is the biggest issue with the pricing of everything.

With the motor mount, at the moment the plan is to make one myself and have it welded to the trucks.

Any advice on what i've mentioned or if you could point me in the right direction in terms of other threads that would be greatly appreciated. Thankyou!!

 

[Vulthor]

Hi! For Australia take a look at Enertion, pretty sure it's located in Australia.

For hills, go dual motor setup.

For ratio 36/16 in case of hills generally recommended.

For kv seems 220kv +/- 30kv is recommended by many power users.

That's all I can say for the moment .

 

[Bails]

Thankyou very much!

Would the battery usage be much more with dual motors? Or is the range more or less the same?

 

[Vulthor]

Thankyou very much!

Would the battery usage be much more with dual motors? Or is the range more or less the same?

Yeah obviously it will draw more battery power, but not in half, I see somewhere 20% less range, but not sure at all.

 

[astilwell611]

On my current board I started with a single 63mm on 6s. I then upgraded to dual diagonal setup and my range has increased slightly. Both motors are run individually on 6s. So it makes sense that range would slightly go up because the board isn't working as hard to pull me around.

 

[Bails]

On my current board I started with a single 63mm on 6s. I then upgraded to dual diagonal setup and my range has increased slightly. Both motors are run individually on 6s. So it makes sense that range would slightly go up because the board isn't working as hard to pull me around.

Yeah that makes sense, cheers astilwell.
I might start with a one motor setup then upgrade if needed.

 

[Vulthor]

On my current board I started with a single 63mm on 6s. I then upgraded to dual diagonal setup and my range has increased slightly. Both motors are run individually on 6s. So it makes sense that range would slightly go up because the board isn't working as hard to pull me around.

Yeah that makes sense, cheers astilwell.
I might start with a one motor setup then upgrade if needed.

Beware!

In the case of astiwell each motor run 6S separately (if I understand), this is different than running 6S for two motors, and probably not as efficient as 12S for two motor.

Again not sure but if someone having the math to compare, for me sounds logic.

 

[torqueboards]

Running 6S separately and/or a single 6S for two motors is pretty much the same. IMO there's no benefit running 6S separately for two motors just adds to more wiring and complications.

There is a benefit in running (2) 6S either in parallel (adding capacity):
- adding more cells in parallel increases the maximum amps you can push through the system
- it also means that by running (2) 6S in parallel you are running less amps per battery pack which will prolong it's lifespan = less stress.

Adding (2) 6S in series for 12S (adding voltage):
- adding voltage will give you more power from the start.
- allows your setup to run at lower amps (since you are running at 12S 44.4V vs 6S 22.2V.)
- bigger battery pack my default. measured in watt hours (6S 5ah vs 12S 5ah is double the watt hours).
- price for (1) 6S 22.2v 20c lipo is $20-22 and price for 12S 44.4v 20C 5ah is $40.
- more power allows your setup to run more efficiently and puts less stress on components.

Single 6S Single Motor (6S 5ah)
Pros
- Cheapest setup, lightest build
- Better to use 63mm motor and not 50mm. 50mm higher chances of getting hotter. Have to check more often to see if motors are hot when riding under harsher terrain (uphill/45min riding).
- If correct kv rating for motor can still reach 20mph. 230KV motor, 16/36 gearing, 83mm wheels.
- Not powerful enough for large/steeper hills 15% inclines above.

Cons
- Can cause more heat in the setup due to single motor and lower voltage.
- Lower mileage range about 5-8 miles due to total Wh of pack - 6S 5ah 111Wh

Dual 6S Parallel Dual Motor (6S 10ah)
Pros
- Cheaper setup, semi light (with 50mm).
- Ability to use 50mm motors. Can divide load (rider,terrain) across two motors. Dual 63mm not needed but still beneficial.
- 230-260KV recommend.
- Can climb 15-25% inclines. Possibly, 30% inclines depends on rider. 30% inclines are pretty hard to find and almost non existent in most cities. A steep hill is about 20-25%.
- Better for climbing hills and braking.

Cons
- 220-230lb riders recommended or less.
- Cost - more expensive, more battery, second motor, second motor mount.

Dual 6S Series Dual Motor (12S 5ah 44.4v)
Pros
- Cheaper setup, 14-16 lbs if not more.
- Ability to use 50mm or 63mm. 63mm for more durability and heavier riders 240-260lbs.
- 230-260KV recommended.
- Can climb 15-30% inclines. 30% incline depends on rider weight. Should be doable at about 200lbs.. not sure for 240-260lbs.
- Better for climbing hills and braking.

Cons
- 240-260lb riders recommended or less.
- Cost - more expensive, more battery, second motor, second motor mount.

 

[Bails]

Jeez, thanks for the feedback torqueboards.

Due to just the amount of money I have to spend I think I'm going to go with the one motor 6s setup, which I think will do me for now.
I only weigh around 150 pounds, but I live on the coast of australia so flat ground is not the most common thing around.
If I went with a 63mm 230kv motor (haven't purchased anything yet) what would you recommend to still be able to climb up most hills, speed isn't too important to me. Something like 12/36 gearing?

Also I have a fair amount of spare 3s 2200mah lipos from other hobbies which I could put together in series, then add in parallel to get a bit of extra range out of the 6s 5000mah.

 

[torqueboards]

6S is perfectly fine. I ran a 6S 5ah on dual 50mm and dual 63mm motors. It was 280KV on about a 15/36 setup. Climbed pretty much anything from 15-25 perhaps 28% inclines.

I rode 6S for about 6 to 8 months and packs eventually had less power in them so upgraded to 12S which was nice since I was so use to 6S power.

230kv would be better for hills. I've tried lower KV and highest gearing 12T/36T 12T/44T. The results are horrible. That's why I recommend a 230kv-260kv motor.

A higher kv motor (200-260kv) allows less resistance and has higher power output than a lower KV motor. Lower KV motor does and should provide more torque but it does no good if you slow down in the middle of a hill if your motors have so much resistance you can't turn the wheels fast enough going uphill.

So IMHO, 230-260kv works great and you can always gear higher 1:3 or 1:4 by adjusting the pulley ratios.

 

[Bails]

Cheers again for the feedback! Looks like 230kv it is..

What esc would you recommend? That isn't too pricey

 

[astilwell611]

Most RC car ESC's will do for 6s. I'm running the Hobbywing 150A. Also I used the Hobbyking 150A on my first build both will get the job done for 6s. Mamba also makes a car ESC capable of 8s I believe. VESC is an option and is capable of up to 12s. I know Torque isn't going to mention his ESC options so I will for him :lol: . He offers a 6s ESC as well as a 12s ESC. If you even remotely think you'll upgrade to 8s, 10s, 12s, or anywhere in between I recommend going ahead and getting a ESC that is capable now and having room to grow. You will not hurt a 12s ESC by running it on 6s. So you could start at 6s for now and when your ready and confident on the board you can up the power.

 

[Bails]

Upgrading to a higher voltage probably will happen so yeah ill make sure to get an esc capable of that. For some reason i was under the impression that these 150A esc's would be capable of going over 6s, but obviously not, so cheers for bringing that to my attention haha.

What benefits does the VESC have? Just looked over at enertion and i can grab one mid next month $160 (will have to save a little i think).

 

[astilwell611]

I personally have no experience with VESC but there are plenty of YouTube vids and post on here documenting it. I know there are a few folks on here selling VESC as well. Check in the classifieds section.

 

[psychotiller]

Upgrading to a higher voltage probably will happen so yeah ill make sure to get an esc capable of that. For some reason i was under the impression that these 150A esc's would be capable of going over 6s, but obviously not, so cheers for bringing that to my attention haha.

What benefits does the VESC have? Just looked over at enertion and i can grab one mid next month $160 (will have to save a little i think).

You should read this.
http://www.hobbywing.com/product_show.asp?id=344

 

[astilwell611]

That's a nice looking ESC but for that price I think you'd be better off with VESC.

 

[Bails]

the VESC does look like a good deal with all its features, compared to other esc's that are capable of those kinds of voltages the price seems fair.
I guess the only thing would be if its as reliable and isn't to much of a struggle to setup/use.