Search found 98 matches

by fesanand
Apr 26 2017 1:25pm
Forum: E-Bike General Discussion
Topic: How many cycles from Hobby King lipo?
Replies: 13
Views: 1992

Re: How many cycles from Hobby King lipo?

Recovering an old thread to share my experience: This week, and after 2 years since purchase, started to show a drastic sag when used below 3.80v per cell. Now HOC (4.20v per cell) won't reach max speed(40mph). And below 3.80v per cell won't reach 18mph I made 400 to 450 cycles, using usually 1/2 of...
by fesanand
Feb 18 2017 1:56pm
Forum: E-Bike Technical
Topic: Question about electromagnetic fields and health
Replies: 16
Views: 1159

Re: Question about electromagnetic fields and health

Thanks for the replies.
I don't do MRI transfers, and I'm far from MRI scan. But good to know.
Thanks Bob K to share your experience.
EM field discarded as hazard, I'm thinking to go for silent cob led though, regarding the converter noise in the helmet could be quite annoying.
by fesanand
Feb 16 2017 7:27am
Forum: E-Bike Technical
Topic: Question about electromagnetic fields and health
Replies: 16
Views: 1159

Re: Question about electromagnetic fields and health

Just wondering why manufacturers would put a thin plate all around the circuits of the AC to DC laptop power supplies. And if there's any relation with electromagnetic fields.
by fesanand
Feb 16 2017 5:39am
Forum: E-Bike Technical
Topic: Question about electromagnetic fields and health
Replies: 16
Views: 1159

Re: Question about electromagnetic fields and health

Maybe I'm too influenced about what I see in my job working in Neuro ICU, probably you don't know anyone with a brain tumour, but I see that everyweek. True that doctors will never tell you that a electromagnetic field caused your tumour, because they still don't know what causes them. Is just my ch...
by fesanand
Feb 16 2017 2:58am
Forum: E-Bike Technical
Topic: Question about electromagnetic fields and health
Replies: 16
Views: 1159

Question about electromagnetic fields and health

I'm planning to build a helmet with e.l. light panel, including a tiny battery and the DC to 120v AC 1.2khz converter, this last one is also tiny and is going to be located in the lower helmet edge so close to my neck and relatively close to my skull. I'm wondering if that kind of converters emit el...
by fesanand
Sep 08 2016 3:31pm
Forum: E-Bike General Discussion
Topic: How do I compare / calculate range between 2 packs?
Replies: 5
Views: 410

Re: How do I compare / calculate range between 2 packs?

You have to calculate your consumption in wh/mile, which is 36v*0.6A= 21.6wh/m Your pack is 561wh divided by 21.6wh/m results in 26miles your're right. Now, if you ride in the same conditions (avg speed and acceleration) with your friends battery, your consumption should be barely the same 21.6wh/m ...
by fesanand
Sep 06 2016 9:26am
Forum: E-Bike Reviews & Testing
Topic: Warning: EBike battery in flames!
Replies: 46
Views: 9627

Re: Warning: EBike battery in flames!

Just curious, how long was burning with that intensity shown in the first picture?
by fesanand
Sep 05 2016 6:17am
Forum: E-Bike General Discussion
Topic: ABS on E-Bike? (Anti-Block-System for braking)
Replies: 33
Views: 1991

Re: ABS on E-Bike? (Anti-Block-System for braking)

And for the 99.99% of consumers who aren't expert MX riders, ABS provides a real safety benefit. That's the point. Emergency straight braking in a dry condition can be trained and I sometimes do at the cost of tyre wear. It's like a game "let's see if I can brake to full stop before a virtual point...
by fesanand
Sep 04 2016 12:58pm
Forum: E-Bike General Discussion
Topic: ABS on E-Bike? (Anti-Block-System for braking)
Replies: 33
Views: 1991

Re: ABS on E-Bike? (Anti-Block-System for braking)

There's an obvious advantage having the ABS on wet conditions.





A pity they didn't try braking in the middle of curve on dry conditions.


.
by fesanand
Sep 01 2016 3:55am
Forum: Battery Technology
Topic: Im not going to bother with a BMS
Replies: 38
Views: 2884

Re: Im not going to bother with a BMS

I've been riding lipos for one year and I have NEVER balanced them. The day I "over dicharged" below 3.5v per cell, after a non balance charging, the cells were completely aligned between 4.18v and 4.20v. That is using HK Imax B6, on the other hand if I use HK GT A-6-10 200W the voltages are 4.16 to...
by fesanand
Aug 28 2016 11:56am
Forum: E-Bike Technical
Topic: Strong and cheap battery box and mounting
Replies: 2
Views: 494

Re: Strong and cheap battery box and mounting

Really nice one.
You could post to the homemade battery thread which is becoming a boxpedia due to gathering multiple different ideas and solutions. :wink:
https://endless-sphere.com/forums/viewt ... &start=475
by fesanand
Aug 25 2016 3:26am
Forum: E-Bike Non-hub Motor Drives
Topic: What does your bike weigh and what is your overall setup?
Replies: 20
Views: 2404

Re: What does your bike weigh and what is your overall setup

33.4kg 22s6p battery for 1400 watthours 7kw Wheelstands. I guess that weight is without battery :?: /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 28kg (61lbs) including battery, the "small" saddle bag with 222Wh (3x 5s 4000ma...
by fesanand
Aug 18 2016 10:49am
Forum: E-Bike General Discussion
Topic: Whats the most stealthiest yet powerful motor
Replies: 19
Views: 2913

Re: Whats the most stealthiest yet powerful motor

Conhis sells a small DD motor that looks as small as a geared motor? Not long ago I picked up interest on this motor, but asking conhis customer service they told me that NON-load speed is 27kmh (17mph) for 36v version and 30kmh (19mph) for 48v version, which I find paranormally slow... anyone has ...
by fesanand
Aug 16 2016 2:35am
Forum: E-Bike General Discussion
Topic: Axle won't sit deep into drop outs
Replies: 18
Views: 2286

Re: Axle won't sit deep into drop outs

In my case I've used 3 frames so far (2 specialized and 1 btwin) and in all cases I had to grind down the dropouts with a file, specially the bottom part of the drop out to make a flatter bottom part 'U'.
by fesanand
Jul 27 2016 3:01am
Forum: Battery Technology
Topic: Lipos are dying on me!
Replies: 17
Views: 1128

Re: Lipos are dying on me!

What about the wind?
I do the same ride everyday (go and return) and on windy conditions consumption climbs about 20%. Is estrange how wind affects always negatively, considering you have both headwind and afterwards tailwind helping in the return. :?:
On really windy days, 30% extra consumption.
by fesanand
Jul 24 2016 4:58am
Forum: E-Bike Technical
Topic: Acid lead to Li-Ion
Replies: 3
Views: 319

Re: Acid lead to Li-Ion

Again I can't find if the controller was inside the detachable battery module or is mounted in the bike frame. Controllers are quite cheap, but adapting a controller to this bike could be difficult if you don't have basic electrical skills. Is the first thing to find out, some pictures of the bike c...
by fesanand
Jul 24 2016 4:49am
Forum: E-Bike Technical
Topic: Implications of stepping down the motor size (?)
Replies: 0
Views: 224

Implications of stepping down the motor size (?)

My current motor is a big gearless 243mm diameter hub motor. (580rpm 64km/h @ 60v @ 26inch ) I'd like to get something gearLESS, stealthier and lighter without losing performance. I wouldn't care to lose some top speed as I never run. Considering that I change the wires for a larger gauge, Would thi...
by fesanand
Jul 23 2016 5:59am
Forum: E-Bike Technical
Topic: Acid lead to Li-Ion
Replies: 3
Views: 319

Re: Acid lead to Li-Ion

Hi, I can't find the Watt used to run that vacuum, but those batteries should be powerful enough to move in terms of amps. You can always give a try. But even if you strip those two Karcher batteries and compose a 36v one, you're still on 3.3ah(if new), LVC could cut off power before you squeeze tho...
by fesanand
Jun 13 2016 2:04am
Forum: E-Bike Technical
Topic: Buzzer low or medium pitch (?)
Replies: 0
Views: 293

Buzzer low or medium pitch (?)

Despite works incredibly well I can't use the typical moped horn(6-7cm diameter) for a new stealthy build (road bike). I don't want those pre-made electric bicycle horns, IMO they sound ridiculous with its high pitch sound :oops: I need something really small, 4cm (1.6")diameter or less. Does anyone...
by fesanand
May 25 2016 10:19am
Forum: E-Bike General Discussion
Topic: Fully waterproof an E bike
Replies: 17
Views: 3148

Re: Fully waterproof an E bike

My case is a bit peculiar, my two last bikes could resist a hard rain for 30 minutes or so, as long as I park it under cover (let's say the typical covered street bike parking) to drain the excess of water, is fine in a daily commute. The problem is the fine wet mist (horizontal if windy) that penet...
by fesanand
May 21 2016 1:48pm
Forum: E-Bike General Discussion
Topic: Talks Started on ISO World Standard for E-Bikes
Replies: 6
Views: 609

Re: Talks Started on ISO World Standard for E-Bikes

We have 1kw and no type approval required. Sometimes i love this country. Our goverment just went: type approval? naw...why? Does not serve the purpose putting people on e-bikes. Sometimes I feel so ashamed to live in the Europe so influenced by tax hunger, lobbies & company benefits. :oops: And so...
by fesanand
May 13 2016 2:59am
Forum: E-Bike Technical
Topic: Hall Hidden Brake Sensor used as Throttle (?)
Replies: 2
Views: 556

Hall Hidden Brake Sensor used as Throttle (?)

I have in mind an stealthy new bike. I was wondering if anyone knows this sensor and if I can use it as a throttle. The idea is to use road bike "drop bar shift lever cable" attached to this sensor and connect it to the throttle connector. So that way, moving the shift lever sideways, instead of shi...
by fesanand
May 03 2016 4:31am
Forum: E-Bike Build Threads / Photos & Video
Topic: Your Creation's Before & After Pics
Replies: 1811
Views: 581326

Re: Your Creation's Before & After Pics

Decathlon (or B´twin) 500s Upgraded with: Front Shimano hydraulic brakes, 60T chainring, air shock , double crown forks, saddle, variable angle stem and DMR MOTO 26x2.40 tyres. Generic rear DD hub motor, approx 45A modded controller, 15s1p 4000Mah lipo battery inside saddle bag. Battery is enough fo...