Search found 39 matches

by Matt_92
Jun 29 2018 9:58am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

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. . PACIFIC Reach Racing + Mid-Drive-1.jpg . transmission-primaire_c80100_38.jpg ...
by Matt_92
May 23 2018 11:13am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

just bought that :twisted:
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2009-11-29 Pacific Reach Racing 002.JPG
2009-11-29 Pacific Reach Racing 002.JPG (94.87 KiB) Viewed 1160 times
by Matt_92
Mar 29 2018 7:16am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

...one more concept for folding bike 20" :
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Java Folding Bike 451
transmission-primaire_c80100_36B.jpg
transmission-primaire_c80100_36B.jpg (117.75 KiB) Viewed 1421 times
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..and its mid drive C80100
transmission-primaire_c80100_37B.jpg
transmission-primaire_c80100_37B.jpg (33.86 KiB) Viewed 1421 times
by Matt_92
Mar 21 2018 7:11am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 996
Views: 194728

Re: LMX P2 : Freeride trials motorcycle frame development

Matt, I can not give much details here, but things are going well driven by strong sales. We are now working on consolidating the team in the sales and production dept to have more free time for new developments. We will rent a second 150m2 workshop next door for assembly as soon as it is available...
by Matt_92
Mar 20 2018 7:51am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 996
Views: 194728

Re: LMX P2 : Freeride trials motorcycle frame development

Thanks Guys, as for living from it, well lets say i'm betting on the future for now :roll: With My engineering degree and experience I could easily be doing 45K€/year in any decent company, but at least now I get to create something radically new. ...in Paris, you can easily pretend 80k€ as Enginee...
by Matt_92
Mar 20 2018 7:36am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 996
Views: 194728

Re: LMX P2 : Freeride trials motorcycle frame development

...bravo les Frenchies !! c'est pas mal du tout votre affaire :wink:
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Congratulation from La Region Parisienne :mrgreen:
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225px-Flag_of_France.svg.jpeg
225px-Flag_of_France.svg.jpeg (7.43 KiB) Viewed 2098 times
by Matt_92
Mar 19 2018 7:33am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

..here is my Excel Sheet with all the parameters following my mid drive (ratio-wheel-kv-Volts-Km/h-eff) :
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Excel Sheet Mid Drive.xlsx
(10.03 KiB) Downloaded 31 times
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Yellow : Enter the value
Green : Results
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Excel Sheet Mid Drive.jpg
Excel Sheet Mid Drive.jpg (177.22 KiB) Viewed 1551 times
by Matt_92
Mar 14 2018 7:35am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

...let's talk my imagination for a powerfull and agressive 20" city bike, I like the idea :mrgreen: :
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Java CL20 (406)
transmission-primaire_c80100_32.jpg
transmission-primaire_c80100_32.jpg (97.16 KiB) Viewed 1607 times
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Connondale Hooligan
transmission-primaire_c80100_33B.jpg
transmission-primaire_c80100_33B.jpg (69.3 KiB) Viewed 1608 times
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Java Freccia (451)
transmission-primaire_c80100_34B.jpg
transmission-primaire_c80100_34B.jpg (98.54 KiB) Viewed 1598 times
by Matt_92
Mar 03 2018 4:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Looks awesome but are you planning on using a freewheel on the crank? Seems extremely dangerous to not use one. Thats a ton of torque if you become entangled in the crank as well as really easy to accidentally throttle and cause a pedal strike when turning. Yes of course Dan, as I already wrote it ...
by Matt_92
Mar 02 2018 10:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

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 -1st st...
by Matt_92
Mar 02 2018 10:16am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Can you explain why I should not go for that type of reducer ? No, that's not what I said. To the contrary, I posted the links to these reducers because they are good option for an e-bike. Why do you need a reducer for 12 mm shaft? Is it to connect a reducer and the 80100 motor directly in series? ...
by Matt_92
Mar 01 2018 5:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Can you explain why I should not go for that type of reducer ?
by Matt_92
Mar 01 2018 5:26am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Hey Ecyclist, I try to find this kind of reducer (PLE, PLF, etc...) for C80100, but I never fund for Ø12 shaft C80100...
by Matt_92
Feb 27 2018 11:12am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Matt_92 Professional Bike Racers ride with a crankset Cadence RPM of 80 or more, they have to keep the Latic Acid from building up in their legs, and when going up hills they need to have 80 or more RPM Cadence to keep their speed up. However How long can you do that ? and/or is it comfortable to r...
by Matt_92
Feb 27 2018 9:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Loaded you get about 85% of that. 4200 x .85=3570rpm 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...
by Matt_92
Feb 23 2018 2:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

DanGT86, you're totally right, for the 2 stages belts drive, about the pitch of the second belt ! I didn't find (or not good searched..) charts with Power/RPM - HTD5M/HTD8M for 20mm wide belt... but I thought about it ! My thought on this is : -1st stage : not enough resistant torque, it's ok for HT...
by Matt_92
Feb 23 2018 9:27am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Visual comparative between 1 stage and 2 stage belt drive :

(bottom brackets are 68mm standards, not large)
transmission-primaire_c80100_25b.jpg
transmission-primaire_c80100_25b.jpg (50.64 KiB) Viewed 1833 times
by Matt_92
Feb 23 2018 9:06am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Hello everybody :D I don't plane to use it off-road We are speaking about a potential 7000w mid drive, not EC 250w.... :mrgreen: Just to have an idea of the price, in this case with 70kv motor (inclued) and one stage belt drive system : (I just made a copy/adaptation of the 2 stages belt drive syste...
by Matt_92
Feb 22 2018 9:01am
Forum: E-Bike General Discussion
Topic: AVIAN featherweight mid drive
Replies: 115
Views: 16726

Re: AVIAN featherweight mid drive

I can't wait to see the follow up with 80mm motor :D
by Matt_92
Feb 22 2018 7:38am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Thanks Ecyclist for your encouragaments :) But if you plane to "commercialize" your reducer, I could be interested :wink: I have to confess, that I prefere have a small reducer as yours that a multi belt drive reducer, in terms of space, but I know too that it's a compromise between cost/space... Gr...
by Matt_92
Feb 21 2018 11:35am
Forum: E-Bike Technical
Topic: Flier Brushless ESC HV 300A For Ebike
Replies: 8
Views: 1022

Re: Flier Brushless ESC HV 300A For Ebike

Hey Tahustvedt, did you buy this controller ? I'm interested with this controller, 200A or 300A, the price is low, but what about the quality ? Yes you can manage the current limite :wink: In my case I plane to use it at 12s with a current max at 160A (or 7000w max), these controllers look attractiv...
by Matt_92
Feb 21 2018 9:46am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

I built the transmission myself, and it is as efficient as two stage belt/chain type, but takes only 1/3 of the space. Do you plane to create an more strong reducer for the 80100 ? can this reducer pass the 80100 torque ? What is the ratio ? How does it cost to you ? do you have machinery for mcahi...
by Matt_92
Feb 20 2018 9:35am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

Hey everybody, don't have time to reply each posts... but great compact reducer Avian ! is it an home made reducer ? do you know its efficiency ? I like the idea to have a dismontable 18650 battery pack, you can replace "easily" a cell if needed... I like too the LMX (frenchy), but the motor is not ...
by Matt_92
Feb 16 2018 10:53am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

yes my friend, lots of possibility, solutions and design following your need/requirements ! where do you live ? I live near of Paris at Puteaux, I would like to go at work with an electric bicycle, but the problem is the ascent on my path (120m on 4km), that's why I want a powerfull assistance :twis...
by Matt_92
Feb 16 2018 7:33am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive 80100 : my project !
Replies: 67
Views: 6965

Re: Specs Performance for 80-100 motor ?

I want to keep the crankset : -in case of failure, I want to be able to go back home :mrgreen: -I want continue to pedal, it's good for health and grow the autonomy :wink: -I want to keep the derailleur as gearbox for the electric motorization (for big ascent) -for the police, it must look like a bi...