Torque

[Bike_On]

How accurate is the simulator? Does it generate similar torque curves when the bike is put on a dyno? I read an article where people challenged the results. I really have no idea where the truth lies.

I trust the guys who made the simulator. Their results are based upon REAL motor testing on a dynamo, and use the data to calculate motor K1, K2 constants and create a model. The founder is a young, smart, engineer, Justin, and very respected in the DIY world. I'm not saying they can't make mistake/mis-calcs. As you play with the different motors, battery voltages, etc, you see a similar pattern for dd hubs, but different scales per the windings.

 

[Mike leroy]

that said..... it is easier to talk about power and calculate power. Wind resistance and gravity effects at a given speed will be calculated in power - watts.

Yes, torque is important, only in the sense that you need enough to maintain a speed or accelerate.

Again, nothing, nothing, nothing beats a mid drive, with gears, for overall, across the band torque. Chain issues, transmission, noise, etc, yes a factor, but the motor uses the gears to run a peak power of the motor and max power transfer to the wheel. If you live in Florida flats, so hub, stay silent, and cruise it. I haven't seen a bike to do it all.

My hill is 18% for a very short distance, i.e., 250 yards. The hill is 10% for about a quarter of a mile. Over such short distances, are DD Hubs still at such a disadvantage?

 

[Bike_On]

My hill is 18% for a very short distance, i.e., 250 yards. The hill is 10% for about a quarter of a mile. Over such short distances, are DD Hubs still at such a disadvantage?

Do you live in a hot summer climate? Do you weigh over 200 lbs. Do you like to use the throttle more than the pedals? If your answer is yes to all three, I would contend that a 250W-500W hub will get hot and cut back. If the controller limits the power to under 500 W, you will likely be ok.

I have a Falco ddhub, (500W rated) but I run it hard and see 700-1000W so I can fly 25-30mph. On hot summer days, I have to set it back a level, or it hits thermal cutback (100W) for 5-10min. A good motor design will protect itself.

I've read the Specialized Turbo thread on cut back....sounds like a thermal limit was reached.

 

[Mike leroy]

Do you live in a hot summer climate? Do you weigh over 200 lbs. Do you like to use the throttle more than the pedals? If your answer is yes to all three, I would contend that a 250W-500W hub will get hot and cut back. If the controller limits the power to under 500 W, you will likely be ok.

I have a Falco ddhub, (500W rated) but I run it hard and see 700-1000W so I can fly 25-30mph. On hot summer days, I have to set it back a level, or it hits thermal cutback (100W) for 5-10min. A good motor design will protect itself.

I've read the Specialized Turbo thread on cut back....sounds like a thermal limit was reached.

I weigh 180 pounds and six feet tall. I train for running on the 10-18% grades. I ran a 25 minute 5 mile race or 5 miles at 12mph. Unsure how this translates to biking.

Highest Temperatures are very moderate -- 70 to 90F, averaging 80F.

I prefer to only use the throttle as a last resort, when the pedal assist adapts poorly.

I do not ride a bike because my only road is 35mph without a bike lane. The residents do not ride bikes in my neighborhood. Bikers must ride in the right hand lane with traffic. Downhill coasting speed is 45+ mph.

I want to pedal uphill with traffic at 35mph without being a hindrance. I prefer a hardtail for a rack to carry 40 pounds of groceries from the store. I currently run two miles to the store and carry 15-35 pounds of groceries back up the 10-18% grades.

Which bike or motor would you recommend?

 

[e-biker]

that said..... it is easier to talk about power Lyen 18 get. 26 in wheels 3 in wide tires. You don't need a noisey mid drive to take hills you need amps and a motor heavy eenough to take the amps. IMHO mid drives are troublesome and noisey. I personally love the performance of all of the 53xx series crystalyte motors, and I have never smoked one yet however I have smoked many cheaper motors.calculate power. Wind resistance and gravity effects at a given speed will be calculated in power - watts.

Yes, torque is important, only in the sense that you need enough to maintain a speed or accelerate.

Again, nothing, nothing, nothing beats a mid drive, with gears, for overall, across the band torque. Chain issues, transmission, noise, etc, yes a factor, but the motor uses the gears to run at peak power of the motor and max power transfer to the wheel. If you live in Florida flats, go hub, stay silent, and cruise it. I haven't seen a bike to do it all.

I run a clyte 5304 up north Ga hills all the time with no problems. I have 24s battery and lyen

 

[MLB]

Should I try contacting them again? If it's this difficult to contact a company customer service in the us must be aweful. same with haibike.

To many many business's online requests are not given the same priority as a phone call. Lots of online 'shoppers'.