Search found 706 matches

by chas58
Jul 29 2020 3:16pm
Forum: Battery Technology
Topic: Laudation batteries
Replies: 18
Views: 911

Re: Laudation batteries

- Heat buildup under a moderate 10amp load for an hour is concerning My 10S3P with Samsung 30Q 141 cells isn't abused. Never draw more than a 5amp load at most and then no more than 1 minute at most. IMO, a 10amp load is NOT moderate with 30Q cells making up a 36V 10S3P (9 Ah) battery pack. Samsung...
by chas58
Jul 28 2020 8:22am
Forum: Battery Technology
Topic: Laudation batteries
Replies: 18
Views: 911

Re: Laudation batteries

Thanks Sundar. The specs of the NCR (or Samsung) cells are pretty well known – but these don’t visibly look like the NCR cells advertised. They do have the amp hours advertised. 1hr 15min at roughly 10 amps is about right (it wasn’t full throttle the whole time). My concerns are: - Build quality is ...
by chas58
Jul 27 2020 4:26pm
Forum: Battery Technology
Topic: Laudation batteries
Replies: 18
Views: 911

Re: Laudation batteries

True.

Although I have been using my snowjoe battery pack as a range extender. They are 10s2p and give me about 30 minutes at full throttle. (Samsung 30q batteries). That was only $120 shipped.

What else am I going to do with the batteries for my snowblower in the summer time? ;-)
by chas58
Jul 27 2020 2:48pm
Forum: Battery Technology
Topic: Laudation batteries
Replies: 18
Views: 911

Re: Laudation batteries

I took a chance and bought these - laudation 36V 10ah Li-ion Battery 18650 (10s3p) for $135 shipped https://www.ebay.com/itm/laudation-36V-10ah-Li-ion-Battery-18650-Rechargeable-battery-for-E-Bike-Electric/254277288980?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 (they have changed thi...
by chas58
Jun 25 2020 1:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sonders Rockstar
Replies: 7
Views: 298

Re: Sonders Rockstar

Ok, I'm curious. Its good to see him branching out like this. Still, you are looking at CAD models, so no telling what the final bike will really be like, If you remember 5 years ago, a LOT changed from the initial pictures (mostly for the better). There are old posts here where I documented that hi...
by chas58
Mar 28 2019 10:14am
Forum: E-Bike General Discussion
Topic: hardcore commuter now in the 20K mile club
Replies: 18
Views: 1731

I'm impressed!

Dang, that is impressive. Looks like part of your ride is pretty with nice patches of nature. I though I commuted a lot, but I probably only do 3000 miles a year. I blame winter! Nice photos – the woman in that last photo looks like someone I used to date in Germany. :-) That is an impressive build,...
by chas58
Dec 14 2017 9:55am
Forum: E-Bike General Discussion
Topic: Cute Q100 lightweight builds slow mtb, fast road
Replies: 291
Views: 58930

Re: Cute Q100 lightweight builds slow mtb, fast road

Sort answer: range. The basic advantage is they can be transported without normal lithium hassles. But the can also be strung togetheer in various combinations. I think it is a little silly to buy the biggest battery you would ever need and carry it with you every where you go. LiGo allows you to ha...
by chas58
Dec 13 2017 1:27pm
Forum: E-Bike General Discussion
Topic: Cute Q100 lightweight builds slow mtb, fast road
Replies: 291
Views: 58930

Re: Cute Q100 lightweight builds slow mtb, fast road

@rolandhorth That is great Roland, sounds like you have created exactly what you need. I think a CX (or gravel) bike is the perfect platform for a fast light drop bar commuter for someone who wants to add their own pedal power. Your setup is great for someone who can do 18-20mph on their own. Its ki...
by chas58
Nov 06 2017 1:50pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Single-speed track stealth ultralight
Replies: 201
Views: 24973

Re: Single-speed track stealth ultralight

I love the mighty mini. Long before they came out with that, I asked them if they would make me one in 36v format. At the time they were not interested in 36v packs, so I had em3ev make me one (same size and watt hours, but much more Ah). I'm glad they took the idea and ran with it (at least in a 52...
by chas58
Nov 06 2017 12:16pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Single-speed track stealth ultralight
Replies: 201
Views: 24973

Re: Single-speed track stealth ultralight

I have a seatpost battery for one of my builds. with my 3lb battery it works. I wouldn't want too much weight that high. How do you attach the power feed to the backpack? I saw one design once that used magnetic coupling effectively acting as a quick disconnect to the power supply. I did do the back...
by chas58
Nov 06 2017 12:13pm
Forum: E-Bike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 53
Views: 5896

Re: Anyone use fairings? Why not...?

Thanks for the replies. That is good info. Looks like the ZZ faring is $200. That is a lot for an experiment that may not work (although this time of year, wind chill is a factor in the northern latitudes!).
by chas58
Nov 02 2017 2:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Fixed gear hub for mid drive system
Replies: 6
Views: 1267

Re: Fixed gear hub for mid drive system

Maybe I'm missing something. Fixed gear means that you can not coast. The hub turns, the pedal turns. Pedal backwards, the hub turns backwards. Single speed means you only have one gear, but you can coast - that is what a freewheel does. There are no motors that use a fixed gear locking ring (i.e. l...
by chas58
Nov 02 2017 10:39am
Forum: E-Bike General Discussion
Topic: ebike Battery sellers
Replies: 20
Views: 2417

Re: ebike Battery sellers

yeah, don't skimp on batteries. Get a name brand like Panasonic or Samsung. I tend to get my stuff from Em3ev or ebike.ca.
by chas58
Nov 02 2017 10:36am
Forum: E-Bike General Discussion
Topic: Chromoly vs aluminum rear rack for battery packs?
Replies: 13
Views: 1362

Re: Chromoly vs aluminum rear rack for battery packs?

have you ever broken one?

I have had seat post attachment racks brake, but not the 4 point attachment racks. You can't accurately say steel is stronger than aluminum. It will bend more before it breaks than aluminum. If you are concerned about cracking/breaking - go for steel.
by chas58
Nov 02 2017 10:33am
Forum: E-Bike General Discussion
Topic: Aluminum vs Steel vs Carbon E-bike Frames
Replies: 50
Views: 7054

Re: Aluminum vs Steel vs Carbon E-bike Frames

are you talkling make or buy? Really, it all depends on the frame builder as you can get a lot of overlap depending on what the frame builder wants. From a buy perspective: Steel is maybe 2lbs heavier (or more for a heavy duty frame). tends to ride better, doesn't fail catastrophically, and can be r...
by chas58
Nov 02 2017 10:26am
Forum: E-Bike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 53
Views: 5896

Anyone use fairings? Why not...?

A thread on efficiency got me thinking about fairings. I ran across this: "Numbers on the topic aren’t easy to find, but some that are regularly cited are extracted from David Gordon Wilson’s Bicycling Science. He states that a rider on a touring bike equipped with a partial fairing, and his or her ...
by chas58
Nov 02 2017 10:18am
Forum: E-Bike Technical
Topic: 6 fet controller with hub drive more efficient?
Replies: 18
Views: 2068

Re: 6 fet controller with hub drive more efficient?

And your ass weighs? Assuming your ass weighs 200 pounds or less, you are going at least 35 mph, running 1400w continuous. Nothing on earth will make your 35 mph more efficient, except aero. Your motor is running flat out, your controller is not pwm ing. To get better efficiency, buy a recumbent bi...
by chas58
Nov 02 2017 10:12am
Forum: E-Bike Build Threads / Photos & Video
Topic: Single-speed track stealth ultralight
Replies: 201
Views: 24973

Re: Single-speed track stealth ultralight

Here is my light weight speedster. The frame bag holds the battery, but it is mostly empty (or available for other cargo). I've cleaned up the wiring a little since this shot.
20160425_194205-02.jpg
20160425_194205-02.jpg (109.2 KiB) Viewed 7989 times
by chas58
Nov 02 2017 10:07am
Forum: E-Bike Build Threads / Photos & Video
Topic: Single-speed track stealth ultralight
Replies: 201
Views: 24973

Re: Single-speed track stealth ultralight

Nice – that is the bike I built in 2013. It is so much fun riding a fast light ebike (and super rare). I have a mountain bike version too, but I don’t use that much. Light and fast is my passion! Where did you buy the motor from? What rpm version is it? FYI, I went to the hardware store and found so...
by chas58
Nov 02 2017 9:56am
Forum: E-Bike Non-hub Motor Drives
Topic: Fixed gear hub for mid drive system
Replies: 6
Views: 1267

Re: Fixed gear hub for mid drive system

What are you trying to do?

There are no motors that accept lock rings.

Why in the world would you NOT want to COAST with a motor?

Not many motors can accommodate a single cog.
by chas58
Nov 01 2017 8:35am
Forum: E-Bike General Discussion
Topic: E-bike Average speed vs Bike vs Car
Replies: 21
Views: 1870

Re: E-bike Average speed vs Bike vs Car

I average 34mph in my car 20 in my ebike, and 16 when pedaling
by chas58
Oct 30 2017 3:56pm
Forum: E-Bike Technical
Topic: BMS Rear Rack Battery Anyone tried it?
Replies: 13
Views: 2571

Re: BMS Rear Rack Battery Anyone tried it?

That sounds about right, weight wise. The weight of the motor (on my rear wheel) never bothered me as far as handling went. I think you'll be OK at those speeds on a bike like yours. If you want the bike to be more agile its not the best place. But at 15mph on a dutch style bike it should be OK. Tha...
by chas58
Oct 30 2017 3:50pm
Forum: E-Bike Technical
Topic: BMS Rear Rack Battery Anyone tried it?
Replies: 13
Views: 2571

Re: BMS Rear Rack Battery Anyone tried it?

docw009 wrote: The Q100 is indeed 4.8 pounds. I've weighed mine. I bought a custom 10S-3P battery and it supports 30 miles of riding. Probably around 3 pounds and fits in a seat bag.
Me too, as soon as I could get a 350watt-hours in a 10s3p (about 2 years ago, finally!). My battery is lighter than my motor!
by chas58
Oct 26 2017 9:36am
Forum: E-Bike Technical
Topic: High-speed, long-distance (heavy "30^3") Q128 commuter build
Replies: 67
Views: 6833

Re: High-speed, long-distance (heavy "30^3") Q128 commuter b

Another benefit of a gravel bike. They tend to have large triangles specifically to fit frame bags like that (for bikepacking). A bike from the '90s (before compact frame geometry) has lots of triangle room. Yeah, I have the classic 1993 specialized Allez racing bike (the one in the movie of that ye...
by chas58
Oct 26 2017 9:23am
Forum: E-Bike General Discussion
Topic: Fixing flats, tubeless, plus hole-plugs and CO2 cylinders?
Replies: 37
Views: 4537

Re: Fixing flats, tubeless, plus hole-plugs and CO2 cylinder

wow, quite the slash. Impressive that the sealant plugged it.

Certainly you don't want dirt getting inside the tire or near the tube where abrasion could be a problem. that and you don't want that crack to grow.