mwkeefer
1 MW
Hey all,
Well I've been working on a razor go-kart I grabbed from the rubbish pyle some time ago - it's one of those little kid (supposedly 12-16 but it does 15mph with me + my 4 year old so 240lbs)... Pulls 25A maximum @ 26A and is quite speedy..
It came stock with a pair of SLAs which had been too badly abused to be worth squat - I promptly built up a pair of 7S packs (5AH) combining 2S and 5S parts - this keeps me right in the 24v range.
Tonight was the first ride - 1 AH for 14.6mph maximum with 240lbs load, not great for economy but it's also the stock motor still and using a rusty #25 chain reduction.
My son and I had a blast - ran 3 laps around our development (I was trying to make it drift but it just wouldn't!) with him on my lap (wearing a helmet) and it was really fun (so close to the ground it feels 2x the actual speed easily).
Tommorow will begin the upgrades:
1.) RC Outrunner in place of the stock 350w motor - driving still a #25
2.) 33t to replace the 20t currently in place - this will compensate for the higher RPM which the outrunner will spin up at.
3.) HV85 controller - I have it laying around and plan to limit this quite low, approx 30A maximum and running on 6 or 8S (haven't yet decided).
4.) Installing high torque servo on the steering tounge
5.) 6 channel RC receiver module
The idea is to make this much more efficient, add some torque and finally I will replace the controller with a normal infineon 6FET type (once I fit some hall sensors to the little outrunner).
The second goal is to have a fully remote controllable (able to override an occupant) gokart I can let my son "drive" while maintaining parental override on steering and throttle!
It's a project my boy has bugged me to get on for some time (I was brainstorming with him one night, he got the idea of putting the outrunner on the cart to make it faster - the RC gear is my idea)...
I'll post some pics of the stages for anyone who is interested - honestly at 37 years old and 175 lbs - this damn thing is already fun here!
-Mike
Well I've been working on a razor go-kart I grabbed from the rubbish pyle some time ago - it's one of those little kid (supposedly 12-16 but it does 15mph with me + my 4 year old so 240lbs)... Pulls 25A maximum @ 26A and is quite speedy..
It came stock with a pair of SLAs which had been too badly abused to be worth squat - I promptly built up a pair of 7S packs (5AH) combining 2S and 5S parts - this keeps me right in the 24v range.
Tonight was the first ride - 1 AH for 14.6mph maximum with 240lbs load, not great for economy but it's also the stock motor still and using a rusty #25 chain reduction.
My son and I had a blast - ran 3 laps around our development (I was trying to make it drift but it just wouldn't!) with him on my lap (wearing a helmet) and it was really fun (so close to the ground it feels 2x the actual speed easily).
Tommorow will begin the upgrades:
1.) RC Outrunner in place of the stock 350w motor - driving still a #25
2.) 33t to replace the 20t currently in place - this will compensate for the higher RPM which the outrunner will spin up at.
3.) HV85 controller - I have it laying around and plan to limit this quite low, approx 30A maximum and running on 6 or 8S (haven't yet decided).
4.) Installing high torque servo on the steering tounge
5.) 6 channel RC receiver module
The idea is to make this much more efficient, add some torque and finally I will replace the controller with a normal infineon 6FET type (once I fit some hall sensors to the little outrunner).
The second goal is to have a fully remote controllable (able to override an occupant) gokart I can let my son "drive" while maintaining parental override on steering and throttle!
It's a project my boy has bugged me to get on for some time (I was brainstorming with him one night, he got the idea of putting the outrunner on the cart to make it faster - the RC gear is my idea)...
I'll post some pics of the stages for anyone who is interested - honestly at 37 years old and 175 lbs - this damn thing is already fun here!
-Mike