GIVE ME YOUR RC KNOWLEDGE for my Scooter project - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Insert BS here A place to discuss anything you want

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-25-2013, 07:52 PM   #1
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default GIVE ME YOUR RC KNOWLEDGE for my Scooter project

Since I know my mt brethren have all sorts of random hobbies, I am soliciting y'all for your RC knowledge!

I have a Razor scooter that I use to get to class, and after seeing a recent electric skateboard design, I have been inspired to electrify my scooter.

Scooter:


Skateboard inspiration:



I need you guys and your knowledge to see if my parts list so far should work together in harmony, and provide what I want. I am planning on using a DC brushless motor and Li-Po battery.

Motor: 730 kV, max 128 A, max 5280 W. At 22.2 Volts it should be spinning at roughly 16,000 rpm. At 22.2 Volts and 125A, will be making roughly 2750 Watts or 3.7 HP, I think that sounds like a good number .

Turnigy TrackStar 1/5th Sensorless Brushless Motor 730KV

Battery: I am planning on using two 11.1V 3s batteries in series to get up to 22.2 V. Using two of the 3s instead of a 6s for packaging reasons. Batteries are rated as 5000 mAh, 35 C constant, 11.1 V. So they can supply 175 Amps Maximum.

Turnigy 5000mAh 3S 35C Lipo Pack

Speed Controller: Rated at 150A continuous, which is slightly less than the batteries max output. I'm not sure if the batteries max output or the ESC rated output should be higher for safety reasons. This also has a BEC that outputs 5.75 V at 3 A, which I am planning on using to power a 5V voltage regulator which will then be used with the throttle potentiometer as the 0-5V signal that the speed controller requires.

Hobbyking 150A Sensored/Sensorless Brushless Car ESC

Throttle: I think I'm just going to use this throttle even though it's pretty expensive and I could probably come up with something on my own for cheaper. These are supposed to be built well, so I'll just go with it. Basically twist throttle 0-5k pot.

Amazon.com: MAGURA Twist Grip 0-5k Potentiometer Throttle with matching left-hand grip.: Everything Else


I also need to figure out charger stuff, but this is the gist of it.

What say you!!!

Thanks,
Evan
Attached Thumbnails
GIVE ME YOUR RC KNOWLEDGE for my Scooter project-scooter_zps24e7832a.jpg   GIVE ME YOUR RC KNOWLEDGE for my Scooter project-scooter_zps24e7832a.jpg  

Last edited by curly; 04-25-2013 at 08:10 PM.
wittyworks is offline   Reply With Quote
Old 04-25-2013, 08:14 PM   #2
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,105
Total Cats: 518
Default

I say this is cool, that's what I say.

I think the drive system is going to be your biggest bet. I know you can weld, but do you have any machining abilities? Getting a sprocket to bolt to the motor is probably going to be pretty easy, but getting one to bolt to your scooter is going to be the hard part. The rest is just wiring, brackets, and zip ties.

This will be RWD, yes? My guess is you're going to have to cut off the back, and a wider swingarm/fork to fit the wheel plus sprocket.

After watching that video I really wish I knew how to long board.
curly is offline   Reply With Quote
Old 04-25-2013, 08:19 PM   #3
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default

Ah yes, I forgot to add that disclaimer. Assume I have unlimited welding/maching abilities. I've been doing machining stuff for one year less than I've been welding. I have access to a mill/lathe/cnc a mile from my house, as well as a fully loaded student machine shop at school.

I am going to cut off the current wheel mount and rebuild it allowing for both the drive sprocket and possibly a disc brake if I figure out I need one. I already have the sprocket mount and drive pulley designed.
wittyworks is offline   Reply With Quote
Old 04-25-2013, 08:59 PM   #4
I'm a terrible person
iTrader: (19)
 
FRT_Fun's Avatar
 
Join Date: Apr 2009
Location: Arizona
Posts: 7,293
Total Cats: 180
Default

Wanna make 2 of everything and do one for me?
FRT_Fun is offline   Reply With Quote
Old 04-25-2013, 10:02 PM   #5
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default

Sure. I'm going to make the first one and find out a final cost, then see whether it makes more sense to build my own entire scooter or build off the razors. Then I want to either put it on kicktarter to see how many I can sell, or talk to boosted boards about it since they are right next to me.
wittyworks is offline   Reply With Quote
Old 04-26-2013, 10:40 AM   #6
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,382
Total Cats: 43
Default

I have nothing to contribute to this thread other than subscribed and looking forward to your progress pics!
elesjuan is offline   Reply With Quote
Old 04-26-2013, 11:03 AM   #7
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,702
Total Cats: 237
Default

Cool idea man. I've been drooling over those boosted boards since i came across them. IIRC the motors and batteries only add something like 4lbs to the board, which is rad. 20mph uphill!

I love longboarding, so naturally that makes me drool.
Fireindc is offline   Reply With Quote
Old 05-27-2013, 05:39 PM   #8
Junior Member
 
Join Date: May 2012
Posts: 131
Total Cats: 2
Default

any progress on this?
Rocwandrer is offline   Reply With Quote
Old 05-27-2013, 05:51 PM   #9
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

I like the links, subbed.
triple88a is offline   Reply With Quote
Old 05-27-2013, 06:06 PM   #10
Senior Member
Thread Starter
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default

No progress yet. School ended two Fridays ago, work started the Monday after. Turbo will probably get the initial bulk of my concentration, then I will work on this for a bit. I think this will be a much easier project than the turbo.
wittyworks is offline   Reply With Quote
Old 05-27-2013, 06:17 PM   #11
Junior Member
 
Join Date: May 2012
Posts: 131
Total Cats: 2
Default

Quote:
Originally Posted by wittyworks View Post
No progress yet. School ended two Fridays ago, work started the Monday after. Turbo will probably get the initial bulk of my concentration, then I will work on this for a bit. I think this will be a much easier project than the turbo.


Everything you need to know is on Endless-sphere.com • Index page They are mostly some breed of crazy, but they know this topic exhaustively.

I've got a brand new hall effect thumb throttle and compatible brushless motor controller I'd part with if you'd like for $35 shipped.
Rocwandrer is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
1991 special edition with hard top full part out JC, NJ russian Miata parts for sale/trade 6 10-08-2015 04:01 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Missing/knock at idle, can someone point me in the right direction? Mikel MEGAsquirt 4 09-28-2015 05:46 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:01 PM.