ScooterMan101
1 MW
Power tool batteries are not known for being able to pull many amps continuous .
I am tired right now , the Battery Section is a good place to read up on Batteries.
I have just started to use Hobby Lipo's , but they come with many concern's . The Battery Section has plenty of threads for Reading.
I am not using Outrunners,
I started off with a Mac 6 T Geared motor, and now also using a Q100c CST 201 Rpm motor.
Neither motor will give fast speeds like what you want unless you up the Volts, and Amps, however on the small Q100c you can only up the volts, I have heard that over 17 amps will kill it real fast.
Both motors on 12s/13s/14s only produces 20-23 Mph, I will be experimenting with higher volts on the Q100c in a month or two from now to get a little more Mph. But am unsure how long the motor will last at higher voltages/higher speeds.
That why I have an eye on what Kepler is doing, He understands what is needed to get beyond 22-23 mph limit of many motors . ( 37-39 kph )
Every week someone comes new to E.S. and says they want to get to 50 Kph, but it is not easy, there is allot of tweaking on your part to do so.
You need a very large/heavy Motor , plus a large and heavy battery that is also able to deliver 30 amps or more.
Or
you need to do what the Pro Road Bike Riders do, Get the most efficient / lightweight bike you can , and get as best aero position as you can.
I am tired right now , the Battery Section is a good place to read up on Batteries.
I have just started to use Hobby Lipo's , but they come with many concern's . The Battery Section has plenty of threads for Reading.
I am not using Outrunners,
I started off with a Mac 6 T Geared motor, and now also using a Q100c CST 201 Rpm motor.
Neither motor will give fast speeds like what you want unless you up the Volts, and Amps, however on the small Q100c you can only up the volts, I have heard that over 17 amps will kill it real fast.
Both motors on 12s/13s/14s only produces 20-23 Mph, I will be experimenting with higher volts on the Q100c in a month or two from now to get a little more Mph. But am unsure how long the motor will last at higher voltages/higher speeds.
That why I have an eye on what Kepler is doing, He understands what is needed to get beyond 22-23 mph limit of many motors . ( 37-39 kph )
Every week someone comes new to E.S. and says they want to get to 50 Kph, but it is not easy, there is allot of tweaking on your part to do so.
You need a very large/heavy Motor , plus a large and heavy battery that is also able to deliver 30 amps or more.
Or
you need to do what the Pro Road Bike Riders do, Get the most efficient / lightweight bike you can , and get as best aero position as you can.
pas940 said:What out runners are you using? I see they do have very high continuous power ratings. I guess it's the high temperature windings (one I looked at was 300deg c) and the fact the ends of the motor are like fans to pull air through it. I have a cnc machine and could make the required mounts for it in a day probably. I'm just not sure I trust such a small motor. Not to mention it'll be a lot more money, the 3kw one I was looking at was 400 dollars + the speed control mount throttle etc.
Not sure why you think I can't pull 10c out of my battery, have you looked at quality high power cells from A123 and the like? 10c is a walk in the park that's 100 amps at 60v 6kw. I think you are to used to seeing junk batteries on ebay that are only good for maybe 2C discharge. I'll run a discharge test on it when I get home. Like I said I'm time poor at the moment, I've just had our first child.
You have got my interest and I'd like to play around with it at some stage. The brackets would be pretty easy to make I'd do it a bit different out of some 10 or 12mm aluminium, more rigidity.
Yeah it's hot here hits over 40c quite often so it'd be a good work out for it. Mind you if they are running winding temps really high the ambient isn't going to effect the cooling much.