40 mph club
- Thread starter wasp
- Start date
dogman dan
1 PW
Just the info I needed! I am wanting 45 mph, and just bought a controller. Looks like 6s lipos for me for sure.
I was hoping to use the 9x7 in a race, but maybe the 9x6 would be better too.
I'd be very interested in your range too. Especially with lots of 30-40 mph accelerations each mile. Please test that someday and post, or PM me.
I was hoping to use the 9x7 in a race, but maybe the 9x6 would be better too.
I'd be very interested in your range too. Especially with lots of 30-40 mph accelerations each mile. Please test that someday and post, or PM me.
Ariane
10 kW
Hi,
I'm looking for the 50 MPH club, i've done it 81 Kph, 5304 24 inch wheel + Methods 100 volt 100 amps controller 24 S 14P.
Good day!
Black Arrow
I'm looking for the 50 MPH club, i've done it 81 Kph, 5304 24 inch wheel + Methods 100 volt 100 amps controller 24 S 14P.
Good day!
Black Arrow
liveforphysics
100 TW
dogman said:
You want whatever multiplies together to have the biggest number, as that represents how many pieces of copper are in that slot. 8X8 with 64pieces would be the best choice, 9x7 with 63 another good choice, 10x6 or 9x6 will have about 5-10% less torque and power potential.
dogman dan
1 PW
I just got a 10x6 rear, yawn, but once I get set up with the race gear, it might be fun on 88v. Good hypermiling motor for a long trek.
Black Arrow, tell me you live close enough to come to the next death race
.
At the death race, at the same voltage, the 9x6 would be a bit faster for top speed, but tourqe may be what you really need, to get out of the corners faster. 50 mph just might win it, I just want to rub shoulders with faster guys.
Black Arrow, tell me you live close enough to come to the next death race
.At the death race, at the same voltage, the 9x6 would be a bit faster for top speed, but tourqe may be what you really need, to get out of the corners faster. 50 mph just might win it, I just want to rub shoulders with faster guys.
I've done it as well
My Ingredients:
2008 Kona Stinky/Deluxe build
Fox DHX 5.0 with 600lb./in. rear spring
Extra stiff front springs on Marz 888
Crystalyte 5303 Rear with Disc
Flat Road with little wind
C-Lyte 4840 Controller
LifePO4 48V 20AH Battery
MAX SPEED 65.1 KPH (40.451 MPH)
MaxAmps 50+
My Ingredients:
2008 Kona Stinky/Deluxe build
Fox DHX 5.0 with 600lb./in. rear spring
Extra stiff front springs on Marz 888
Crystalyte 5303 Rear with Disc
Flat Road with little wind
C-Lyte 4840 Controller
LifePO4 48V 20AH Battery
MAX SPEED 65.1 KPH (40.451 MPH)
MaxAmps 50+
liveforphysics
100 TW
60+mph club.
Next bike is 100mph or bust.
Next bike is 100mph or bust.
John in CR
100 TW
liveforphysics said:
Eeeks! I better hurry up and hit 75 or 80mph just to get my name on the plaque for a while, because I don't want to try for much more than that. 8)
liveforphysics
100 TW
John in CR said:
You're going to have the fastest E-bike on the forum way before my 100mph build is finished.
Hell, I hit 62mph with your bike running a single motor at lower power, now it's going to be higher voltage, better wheel size, and TWO MOTORS! 75-80mph should definitely happen for you, which will make you the fastest on ES, maybe the fastest e-bicycle ever.
cell_man
100 kW
I did 67kph on my dual Mac Shanghai motors running a 48V 20Ah pack, on the flat, no wind, but just a bit tucked for improved aero :wink: I'm just running a pair of 12 Fet 25A controllers with the shunts a little soldered and getting about 65A between the 2 controllers. These motors are a higher speed winding than the standard motor (about 30% higher), maybe a bit too high even for a dual motor setup (about 88kph no load at circa 50V). I reckon a pair of the standard motors running 60V with about 30A current limit per motor would be really nice. Similar top speed but better acceleration. I also find a pair of not too big or overly stressed motors offers a few advantages over putting all that power into a single hub motor IMO.
Edit: I just now soldered up the shunts some more and now it's pulling about 90A with peak current of 108.1A according to the CA, so pulling around 5KW under acceleration at low speed. It feels seriously fast but I don't know how long the gears or controller will last so I'll have to tread carefully. Managed 68kph on the flat but the shunts haven't really effected the top speed as the power is down to less than 3KW at that speed, but it gets there a bit quicker.
Edit: I just now soldered up the shunts some more and now it's pulling about 90A with peak current of 108.1A according to the CA, so pulling around 5KW under acceleration at low speed. It feels seriously fast but I don't know how long the gears or controller will last so I'll have to tread carefully. Managed 68kph on the flat but the shunts haven't really effected the top speed as the power is down to less than 3KW at that speed, but it gets there a bit quicker.
John in CR
100 TW
liveforphysics said:John in CR said:
You're going to have the fastest E-bike on the forum way before my 100mph build is finished.
Hell, I hit 62mph with your bike running a single motor at lower power, now it's going to be higher voltage, better wheel size, and TWO MOTORS! 75-80mph should definitely happen for you, which will make you the fastest on ES, maybe the fastest e-bicycle ever.
If that doesn't do the trick then there's my secret weapons that I'm not authorized yet to unveil 34s+ capable (136v conservatively), multiple gears, and an aero form (going to meet Harold in CR Wednesday to pick up some big diameter balsa logs , 20"+). I'm working on the motor mount today to try and make motor swapping easy, since at low power this could be my cross CR bike. 8)
Johns
cell_man
100 kW
John in CR said:
Now that's just getting silly
but I like it. I'm gonna get my folks to bring over my motorbike gear when they come over to visit in a few months. 100mph or a lot more didn't feel like much on the Ninja with 1 piece leathers and all the gear but 40mph on my mountain gets my heart rate up, especially when it comes time to stop as it's only got rim brakes on the front ATM. I'll definitely have to try 60V on the present setup, maybe I can hit 80kph, so 50mph but I don't think the motors will take much of that, well I think the motors are good for it, it's just the gears. I already think it's too fast for what it is. I'll have to try and get myself a better bike before I step it up much more I reckon.John in CR
100 TW
Gotta put a decent number out there before the speed freaks get bikes built this summer. Thing is when I rode a motorcycle daily for over 10 years, I rarely went over 60mph. I do want to test high voltages though, because I'd like to try something like those Cute Little motors, give them the advantage of multiple speeds and put 2-3kw through them after mods.
BTW, my bikes are perfectly street legal as bicycles.
John
BTW, my bikes are perfectly street legal as bicycles.
John
cell_man
100 kW
I think you'd be pushing your luck with that sort of power through a cute motor. They are a very small motor internally and get pretty warm even running moderate power. You should definitely try the Mac motor or the Bafang Climber which are BMC sized motors without the BMC price if you want to fairly powerful geared hub motor but serious power will always be a bit limited by the gears. I think 2KW a piece on the Mac motor is doable and still fairly reliable if you tread carefully. I've used 1500W with no problem. I think the dual high rpm motors might be better than the standard in some ways as it doesn't quite have the torque off the line that the standard motor does but the fact you have 2 makes up for plus spread the load a bit. If you can avoid shock loading the gears I'm sure 2KW or maybe a bit more is still fairly reliable on the nylon gears and I only charge 3USD for replacement gear so it doesn't brake the bank if 1 does go.
John in CR
100 TW
cell_man said:
15 amps at 140 volts is 2100 watts input. With ventilation I'd be very surprised if any direct drive hub motor can't handle that much power, especially with variable gearing to avoid bogging down on hills. If the cutties are geared hubs then I'm not interested. I'm interested in the smallest direct drive brushless hub motors that are available.
docnjoj
1 GW
I can't wait to see that fairing. John. Yer gonna carve balsa like those old Monogram wood battleship kits i used to make! Ya gotta make BIG templates! Balsa rules!
otherDoc
otherDoc
I've hit 48mph on my bike sitting completely upright and courage-limited. This bike could probably do close to 60mph but being as it's a road bike with drop bars, no suspension, v-brakes and tiny street slicks that's just asking for trouble. Now my sprocket freewheel is making a ton of noise so I might have to shell out the money for a new cassette wheel and a pair of ENO Freewheels.
