nomad Posted February 1, 2017 Share Posted February 1, 2017 Ride responsibly and Wear suitable protective gear! = Safe Speed = 70kg rider >40% charge. Heavier rider or lower battery? Ride slower! 21 km/h - Ninebot One S2 (310Wh) 21 km/h - Ninebot One E+ (320Wh) 22 km/h - Gotway MCM4 (340Wh) 22 km/h - Kingsong KS14C (340Wh) 22 km/h - Kingsong KS14D (420Wh) 22 km/h - IPS 141 Zero (340Wh) 22 km/h - IPS 191 Lhotz (340Wh) 23 km/h - Inmotion V5F, V5F+ (320Wh, 480Wh) 25 km/h - Inmotion V8 (480Wh) 28 km/h - Gotway MCM4 (680Wh) 28 km/h - Kingsong KS14C (680Wh) 28 km/h - Kingsong KS16B (680/840Wh) 32 km/h - Kingsong KS16S (820Wh) 32 km/h - Kingsong KS18A-1200W (840Wh) 32 km/h - Gotway ACM (680/820Wh) 32 km/h - Gotway Msuper v3 (680/820Wh) 32 km/h - Rockwheel GT16 (680Wh) 35 km/h - Kingsong KS18A-1200W (1680Wh) 35 km/h - Rockwheel GT16 (858Wh) 40 km/h - Gotway ACM (1300/1600Wh) 40 km/h - Gotway Msuper v3s, v3s+ (1300Wh, 1600Wh) 40 km/h - Gotway Monster (2400Wh) 45 km/h - Kingsong KS18A-2000W (1680Wh) = Real Range = 20-25 km/h urban commuting, 70kg rider, not aggressive riding, not offroad, above 15°C ambient temperature, not hilly, not windy, new good condition batteries (5km rounded). 20 km - Ninebot One S2 (310Wh) 20 km - Ninebot One E+ (320Wh) 20 km - Gotway MCM4 (340Wh) 20 km - Kingsong KS14C (340Wh) 20 km - IPS 141 Zero (340Wh) 20 km - IPS 191 Lhotz (340Wh) 20 km - Inmotion V5F (320Wh) 25 km - Kingsong KS14D (420Wh) 30 km - Inmotion V5F+ (480Wh) 30 km - Inmotion V8 (480Wh) 40 km - Gotway MCM4 (680Wh) 40 km - Kingsong KS14C (680Wh) 40 km - Kingsong KS16B (680Wh) 40 km - Gotway ACM (680Wh) 40 km - Rockwheel GT16 (680Wh) 40 km - Gotway Msuper v3 (680Wh) 50 km - Kingsong KS16B (840Wh) 50 km - Kingsong KS16S (820Wh) 50 km - Gotway ACM (820Wh) 50 km - Kingsong KS18A-1200W (840Wh) 50 km - Gotway Msuper v3 (820Wh) 55 km - Rockwheel GT16 (858Wh) 80 km - Gotway ACM (1300Wh) 80 km - Gotway Msuper v3s (1300Wh) 100 km - Gotway ACM (1600Wh) 100 km - Gotway Msuper v3s+ (1600Wh) 105 km - Kingsong KS18A-1200W, KS18A-2000W (1680Wh) 150 km - Gotway Monster (2400Wh) * Real Range calculation: Capacity Wh / 16 = km Inmotion V8 example: 480Wh / 16 = 30km * Peak power calculation: Fully charged, new good condition batteries (100W rounded). battery pack voltage (serial) * number of packs (parallell) * nominal discharge rate * 95% switching efficiency Rockwheel GT16 (858Wh) example: 84V * 4packs * 10A * 0.95 = 3192W The standard battery cells used in EUCs have 10 Ampere nominal discharge rate. Dynanometer tests have shown the batteries have not delivered any more in practice so 10A was used for all calculations. 15-cell pack = 63V * 10A = 630W 16-cell pack = 67.2V * 10A = 672W 20-cell pack = 84V * 10A = 840W 95% efficiency (5% waste heat) * Safe Speed calculation: Ninebot One S2 (310Wh): 500W nominal, 1200W peak √ 500W = 22 km/h 22 km/h ^ 2 * 2.5 = 1210W Unsafe! 21 km/h ^ 2 * 2.5 = 1103W OK. Ninebot One E+ (320Wh): 500W nominal, 1200W peak √ 500W = 22 km/h 22 km/h ^ 2 * 2.5 = 1210W Unsafe! 21 km/h ^ 2 * 2.5 = 1103W OK. Gotway MCM4 (340Wh): 800W nominal, 1300W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W Unsafe! 22 km/h ^ 2 * 2.5 = 1210W OK. Kingsong KS14C (340Wh): 800W nominal, 1300W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W Unsafe! 22 km/h ^ 2 * 2.5 = 1210W OK. Kingsong KS14D (420Wh): 800W nominal, 1300W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W Unsafe! 22 km/h ^ 2 * 2.5 = 1210W OK. IPS 141 Zero (340Wh): 1000W nominal, 1300W peak √ 1000W = 32 km/h 32 km/h ^ 2 * 2.5 = 2560W Unsafe! 22 km/h ^ 2 * 2.5 = 1210W OK. IPS 191 Lhotz (340Wh): 1000W nominal, 1300W peak √ 1000W = 32 km/h 32 km/h ^ 2 * 2.5 = 2560W Unsafe! 22 km/h ^ 2 * 2.5 = 1210W OK. Inmotion V5F, V5F+ (320Wh, 480Wh) : 550W nominal, 1600W peak √ 550W = 23 km/h 23 km/h ^ 2 * 2.5 = 1323W OK. Inmotion V8 (480Wh): 800W nominal, 1600W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W Unsafe! 25 km/h ^ 2 * 2.5 = 1563W OK. Gotway MCM4 (680Wh): 800W nominal, 2600W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W OK. Kingsong KS14C (680Wh): 800W nominal, 2600W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W OK. Kingsong KS16B (840Wh): 800W nominal, 2600W peak √ 800W = 28 km/h 28 km/h ^ 2 * 2.5 = 1960W OK. Kingsong KS16S (820Wh): 1200W nominal, 2600W peak √ 1200W = 35 km/h 35 km/h ^ 2 * 2.5 = 3063W Unsafe! 32 km/h ^ 2 * 2.5 = 2560W OK. Kingsong KS18A-1200W (840Wh): 1200W nominal, 2600W peak √ 1200W = 35 km/h 35 km/h ^ 2 * 2.5 = 3063W Unsafe! 32 km/h ^ 2 * 2.5 = 2560W OK. Gotway ACM (680/820Wh): 1500W nominal, 2600W peak √ 1500W = 39 km/h 39 km/h ^ 2 * 2.5 = 3803W Unsafe! 32 km/h ^ 2 * 2.5 = 2560W OK. Gotway Msuper v3 (680/820Wh): 1500W nominal, 2600W peak √ 1500W = 39 km/h 39 km/h ^ 2 * 2.5 = 3803W Unsafe! 32 km/h ^ 2 * 2.5 = 2560W OK. Rockwheel GT16 (680Wh): 2000W nominal, 2600W peak √ 2000W = 45 km/h 45 km/h ^ 2 * 2.5 = 5063W Unsafe! 32 km/h ^ 2 * 2.5 = 2560W OK. Kingsong KS18A-1200W (1680Wh): 1200W nominal, 5100W peak √ 1200W = 35 km/h 35 km/h ^ 2 * 2.5 = 3063W OK. Rockwheel GT16 (858Wh): 2000W nominal, 3200W peak √ 2000W = 45 km/h 45 km/h ^ 2 * 2.5 = 5063W Unsafe! 35 km/h ^ 2 * 2.5 = 3063W OK. Gotway ACM (1300/1600Wh): 1600W nominal, 4800W peak √ 1600W = 40 km/h 40 km/h ^ 2 * 2.5 = 4000W OK. Gotway Msuper v3s, v3s+ (1300Wh, 1600Wh): 1600W nominal, 4800W peak √ 1600W = 40 km/h 40 km/h ^ 2 * 2.5 = 4000W OK. Gotway Monster (2400Wh): 1600W nominal, 8000W peak √ 1600W = 40 km/h 40 km/h ^ 2 * 2.5 = 4000W OK. Kingsong KS18A-2000W (1680Wh): 2000W nominal, 5100W peak √ 2000W = 45 km/h 45 km/h ^ 2 * 2.5 = 5063W OK. Link to comment Share on other sites More sharing options...

Marty Backe Posted February 1, 2017 Share Posted February 1, 2017 Your range values for the ACM V2s and MSuper V3 appear very close to my actual experience. I haven't yet tested my Monster in the real-world - hopefully it is also within your predictions. Link to comment Share on other sites More sharing options...

Mono Posted February 1, 2017 Share Posted February 1, 2017 What is the model behind the safe speed calculations and, in particular, how is the constant calculated? Link to comment Share on other sites More sharing options...

US69 Posted February 1, 2017 Share Posted February 1, 2017 50 minutes ago, Mono said: What is the model behind the safe speed calculations and, in particular, how is the constant calculated? would like to know that also: this: 2*2.5 numbers i dont get? and that also for wheels that arent on the market yet, like Ks16s or Ks18 2000watt? Link to comment Share on other sites More sharing options...

US69 Posted February 1, 2017 Share Posted February 1, 2017 Also i have to say that even as the batteries are just rated at 10 Amps....did not mean that for a short time they could not give more...they could...its just bad for the cells and not reliable! The russian test belt only tested what the wheels are able to produce on power....and there are several aspects into this...not just max batterie pack power availablity..... Also KS did for a example not use all of the packs in parallel....the packs (on the actual wheels) are just "daisy chained"... and nevertheless they got a safe 30kmh out of their wheels..... so that list is a bit theoretical....at least...Sorry Link to comment Share on other sites More sharing options...

Chriull Posted February 2, 2017 Share Posted February 2, 2017 I decided to split the KS16 battery pack configuration discussion to the new thread http://forum.electricunicycle.org/topic/6444-daisy-chain-vs-real-parallel-battery-packs/to not "hijack" @nomad's thread... Edit: Hope this worked out well and everything is ok - is my fist thread splitting... Link to comment Share on other sites More sharing options...

Smoother Posted February 3, 2017 Share Posted February 3, 2017 Thanks @nomad. That's a huge amount of work you have done for us. Its going to be referenced frequently. I have been wondering for some time what all the various wheels are capable of; now I know. And the calculations are helpful too. Well done. I'll rep you when my allowance is topped up. I've been a bit rep happy today. ? Link to comment Share on other sites More sharing options...

Pingouin Posted February 21, 2017 Share Posted February 21, 2017 Hi, I have a question regarding the safe speed you indicate, is it the app speed or the real speed ? Thank you for your work ! Link to comment Share on other sites More sharing options...

LuckySXM Posted March 5, 2017 Share Posted March 5, 2017 Hi, I thought the Monster had a nominal of 1500W and peak of 3000W, as per the specs given by sellers. 8000W ? Because if 3000W is peak power, then max safe speed is 34 km/h using your formula (which I don't understand but I'm just going to trust you on that). What am I missing ? Link to comment Share on other sites More sharing options...

exoplanet Posted January 12, 2018 Share Posted January 12, 2018 You should rather show the range at top speed before slow down. on the ninebot you can maintain 22 kmh for about 11km Link to comment Share on other sites More sharing options...

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