Recent content by Matt_92

Design is done, I'm going to start to buy commercial components. I finally decided to do the second stage with 2 belts HTD5M 20mm width. The torque starts to be awesome at this second stage if performing with peak 7000W. . . . Question : My bottom bracket is 68mm. If I add the 2 external...

just bought that :twisted: .

...one more concept for folding bike 20" : . Java Folding Bike 451 . . ..and its mid drive C80100

Thx for the infos guys ! Hope you will update and grow your product range and business. If you grow up with a second workshop, it's a good sign :wink: Last thing I would know, do you manufacture all your parts (I don't peak of commercial parts) ? or do you ask to contractors for specific...

...in Paris, you can easily pretend 80k€ as Engineer in an international company, with 10 years senority !! But what you do is most rewarding that any job !! One more time (as Daft Punk says) : CONGRATULATION. I would love create or integrate a compagny like yours, you are a example for me...

...bravo les Frenchies !! c'est pas mal du tout votre affaire :wink: . Congratulation from La Region Parisienne :mrgreen: .

..here is my Excel Sheet with all the parameters following my mid drive (ratio-wheel-kv-Volts-Km/h-eff) : . . Yellow : Enter the value Green : Results .

...let's talk my imagination for a powerfull and agressive 20" city bike, I like the idea :mrgreen: : . Java CL20 (406) . Connondale Hooligan . Java Freccia (451)

Yes of course Dan, as I already wrote it before, I didn't find 3D model of freewheel and adapted crank... :mrgreen:

I continued yesterday to brainstorm and I arrived to something not so bad for standard motor C80100-130kv : -50km/h = 436 rpm at the wheel -Derailleur chainring 11/42 stage : ratio = 3.81:1 = 114 rpm at crank -Chainring belt/crank 14/42 stage : ratio = 1:3 -2nd stage belt 72/18 : ratio = 1:4...

Yes, this is what I wrote : :mrgreen: :mrgreen:

Can you explain why I should not go for that type of reducer ?

Hey Ecyclist, I try to find this kind of reducer (PLE, PLF, etc...) for C80100, but I never fund for Ø12 shaft C80100...

ok for 70 rpm, but how fast ? 50km/h ? I understand well your point of view, but I consider that the ratio 42/11, with 26" wheels, at 50km/h, is not something "difficult". I use to do it without motor when I can do it. But for sure, I consider 50km/h as the max speed, and it will be certainly...

Hey dan, you mean that when loaded, I have to consider 15% of losses between loaded/not loaded ? Here is my brainstorming to calculate the kv following speed, crank rpm, and battery : If I consider 50km/h with a 26-1.00 tyre = 436 rpm at the rear wheel If I consider last chainring stage ratio...