Search found 417 matches

by donn
Nov 14 2019 6:48pm
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

I often observe that a bicycle is a machine, but it's also like a musical instrument, sensitive to subtleties of setup and the user's technique. So if a regular bike is like a guitar, a suspension bike is ... it's like another kind of guitar. There's small and large, steel and nylon string, archtop...
by donn
Nov 14 2019 11:32am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

I'm not so sure a lot of padding is what you need down there, though. You need enough and no more, like a good motorcycle seat. My favorite is actually one with no padding at all, it's just a sling, kind of classic lawn chair style. I guess really this whole discussion is kind of silly if it doesn't...
by donn
Nov 13 2019 12:04pm
Forum: E-Bike General Discussion
Topic: low voltage cut off when riding a long ride
Replies: 10
Views: 335

Re: low voltage cut off when riding a long ride

Bearing in mind that all of the above apparently assumes Lithium Cobalt battery chemistry, with 3.6V cells where that matters to the discussion.
by donn
Nov 13 2019 11:59am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

Right, and I think the geared hub's down side is really more that heat issue, than efficiency lost in the gearing - I mean, that's where the heat comes from, but the direct drives are mainly just better at shedding it. So the geared hubs tend to zero in on a balance between small and powerful, where...
by donn
Nov 13 2019 1:24am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

We seem to be talking about different things here. There is no significant aero advantage at up-hill pedaling speed, and overall, relative to an upright design, the only question is how big the disadvantage is going to be (and whether it matters.) They're open road bikes, not mountain bikes. Mine ha...
by donn
Nov 12 2019 2:11pm
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

There's a technique component to this, of course. Recumbent enthusiasts can be a little fanatic about pedaling cadence. You could look at the "stand on it" technique as a way of coping with a gearing mismatch, that of course isn't available to someone in a recumbent position, so in that case you wan...
by donn
Nov 12 2019 11:23am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

I'm probably not ready to braze up a bicycle yet, but purely beginner non-skill has been good enough for some functional parts. The frame joints would be in large part about getting everything jigged up solid and fitting together, which I suppose is true with welding too. Slightly lower temperature ...
by donn
Nov 11 2019 5:51pm
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

As luck would have it though, it's easiest for me to go for an acetylene refill during business hours, and the local shop is open on Saturday too. The distinction between brazing and braze welding is interesting, but it isn't clear to me that it's real meaningful. The same filler material with the s...
by donn
Nov 11 2019 1:40pm
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

I took the features I needed, and welded a longtail cruiser that is my most comfortable ride to date. Anybody needing special features needs to buy a wire feed welder. If I can weld a frame, so can you. Never took a class in welding, and still weld like a monkey on lsd. But I build what I want out ...
by donn
Nov 11 2019 12:48am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 87
Views: 2573

Re: Why not comfort bikes?

Recumbents can have larger diameter wheels, too, although with some major tradeoffs that come to mind which affect the general usability as a bicycle: Dropping in somewhat late to the party, here, I'd just say - that's all true, except it's a matter of opinion whether those are all such "major" tra...
by donn
Nov 05 2019 3:17pm
Forum: E-Bike General Discussion
Topic: High power ebike means none of the rules apply to me
Replies: 93
Views: 4090

Re: High power ebike means none of the rules apply to me

There's nothing in the law against making your own ebike in the UK. Just curious about how this works. Really it's the same anywhere, if there are laws governing the potential speed or power of your vehicle. How are such laws enforced with home-made ebikes, how do they know that it can only develop...
by donn
Nov 01 2019 11:26am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 268
Views: 9546

Re: Hub motor industry dying?

I’d like a throttle that’s it’s own thing not doing regen hooked up to possible mechanical brake as well. A simple throttle/regen brake Sure, the kit will come with a throttle, too. throttle that's its own thing, controls forward drive voltage, not regen. brake switch that overrides throttle, turns...
by donn
Nov 01 2019 9:53am
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 268
Views: 9546

Re: Hub motor industry dying?

And regen I think could be very productive no? You could reasonably expect 10% less net battery drain, per trip. Still looking for a good throttle for regen That bicycle would be an odd choice for spendy, bleeding edge ebike gear. If you're using an inexpensive controller with on/off constant regen...
by donn
Oct 31 2019 11:04pm
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 268
Views: 9546

Re: Hub motor industry dying?

whats a low cogging hub motor? The difference between a efficient DD motor and a cheap one is about 30% reduced cogging. So make sure to get a motor with the highest peak efficiency you can get. I don't want to put words in anyone's mouth, but I think that's exactly why he asked. It seems like an i...
by donn
Oct 29 2019 10:07am
Forum: E-Bike General Discussion
Topic: Does this exist? Regen braking for ebike & trailer.
Replies: 11
Views: 431

Re: Does this exist? Regen braking for ebike & trailer.

It seems to me too that common on/off regen, as provided with inexpensive controllers, will do the job, but of course it depends on the details. Given the actual combined weight, typical descent grade, and desired speed, someone here probably knows from experience. One consistent speed across varyin...
by donn
Oct 28 2019 8:51am
Forum: E-Bike General Discussion
Topic: High power ebike means none of the rules apply to me
Replies: 93
Views: 4090

Re: High power ebike means none of the rules apply to me

Those who categorize people in two groups, always forget a third. There's two kinds of people: 1) the people who believe there are two kinds of people, and 2) the people who don't believe that. The other side is that the rules don't stop idiots from being idiots... Indeed, it's always the best for ...
by donn
Oct 24 2019 12:44am
Forum: E-Bike General Discussion
Topic: RadPowerBike RadCity Commuter
Replies: 152
Views: 3875

Re: RadPowerBike RadCity Commuter

It should have a significant dead travel, that's standard. I believe the point is that your motor springs into action only when you really want it to, not because you accidentally moved the throttle a little when you were wrestling the handlebars etc.
by donn
Oct 23 2019 6:41pm
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 53
Views: 2942

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

I consider CAv3 pretty mandatory anyway. Pricing on easily tuned controllers with those feature sets would be pretty high? I wish I could tell you how much I paid for my "Infineon KH6xx" controller, but it was part of a package. A fraction of what a Phaserunner will cost you, for sure. I'm not sayi...
by donn
Oct 23 2019 10:19am
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 53
Views: 2942

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

The only drawback is CA3 cruise control. The regen brake alone does not disengage CA3 cruise. What happens? I assume it does interrupt the cruise function - maybe it's too early in the morning, but I can't picture the motor both driving ahead and braking to send current in the other direction, at t...
by donn
Oct 20 2019 11:24am
Forum: E-Bike General Discussion
Topic: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?
Replies: 53
Views: 2942

Re: 1 kW motor : rear G360, GMAC, 9C RH212, Crystalyte H3540 - or front Grin All Axle ?

the ebrake is awsome :) It's set around 800W maximum, it's sufficient and I prefer to be conservative given the raise in voltage each time I brake (up to 1.5V on my 52V battery), it can possibly damage the battery if the breaking is too hot on a full battery. But even with this settings it replaces...
by donn
Oct 16 2019 4:44pm
Forum: E-Bike General Discussion
Topic: High power ebike means none of the rules apply to me
Replies: 93
Views: 4090

Re: High power ebike means none of the rules apply to me

So do not give fuel to the Politician's and Swamp Bureaucrat's that want to take more money from us in the Guise of License and Registration Fees $$$ . He is after all riding a e-bike, not gas engine motorcycle, he is helping the Planet in that Regard . Tell them, not us. We don't control who sees ...
by donn
Oct 06 2019 11:26pm
Forum: E-Bike General Discussion
Topic: High power ebike means none of the rules apply to me
Replies: 93
Views: 4090

Re: High power ebike means none of the rules apply to me

Sounds like most who commented aren't concerned with any rule changes in the near future, so that's actually kind of heartening to hear. You have to consider the crowd. Who expects legislation to be based on what we think is sensible? Even "our" advocacy organizations, if PeopleForBikes qualifies, ...
by donn
Sep 26 2019 3:54pm
Forum: E-Bike General Discussion
Topic: two way throttle? (thumb or twist)
Replies: 14
Views: 410

Re: two way throttle? (thumb or twist)

All the diy built bikes are using mechanical braking and no regen? Rediculous. No, a direct drive build without regen is a pretty near the bottom of the barrel. (But direct drive only - hubs with internal freewheeling gearing don't do regen, nor do crank drive builds like BBxxx.) But I believe most...
by donn
Sep 23 2019 9:03pm
Forum: E-Bike General Discussion
Topic: Lime Bike battery fire
Replies: 33
Views: 1507

Re: Lime Bike battery fire

There's a pretty fair constituency for them here, I think, so it isn't just down to city hall to twist their arms hard enough to clean it up. The city has to make at least a show of bending over for Lime et al., so they can cultivate the young people vote (not that these young people really vote ver...
by donn
Sep 20 2019 2:39pm
Forum: E-Bike General Discussion
Topic: Hub motor industry dying?
Replies: 268
Views: 9546

Re: Hub motor industry dying?

By the time you make the hub big enough and rim small enough to be capable of climbing you've destroyed any ability the suspension has to operate on rough terrain. So off road , hubs are at a disadvantage? I'll take your word for it. I suppose the Chinese, who supposedly account for 90% of electric...