Tony01
100 W
My variable regen is my primary brake. Before it skids the tire it will bring in up to about 9500 watts peak. Get about 5% back.
Tony01 said:My variable regen is my primary brake. Before it skids the tire it will bring in up to about 9500 watts peak. Get about 5% back.
There is a market for coaster brakes, just sold a beach cruiser with coaster brakes. A lot to be admired, I have never had to work on them or have them fail, that I can remember. I love disc brakes, not so much rim brakes but most of the Bikes at my house have rim brakes but they are good enough that spending money to replace them will not happen. I don't look for regen to replace coaster, disc or pad brakes. We have not talked about regen over heating the motors yet! Regen has it's place and any motor that is capable of it I would implement it.by Balmorhea » Sep 16 2020 2:48pm
Coaster brakes still have some advantages, and several of my bikes have them. Total immunity to ambient conditions and more than enough power to lock the wheel, with none of the vulnerability or maintenance of a cable or hose, are good things. In another hundred years, we'll still have coaster brakes, but the fashion chasers will have abandoned hydraulic discs for something more exotic sounding.ZeroEm wrote: ↑Sep 16 2020 8:14am
I use regen in my leaf then the disc brakes kick in. Don't think I will ever take the disc brakes off and put shoe brakes on and quit using regen.
Coaster brakes were the big thing at one time and Caves were popular homes before houses. We must move on and embrace the future.
There's nothing wrong with disc brakes. I have some and I like them fine. But they don't stop better than good rim brakes; that's not one of their advantages.
Balmorhea said:John in CR said:...Until you get caught on a hill in the rain where you've got a vehicle with wholly inadequate braking power.
You have inventive thinking about rim brakes. Yes, like discs they require a couple of wheel rotations to squeeze out excess water when it's present, before they deliver good strong braking. But when using aluminum rims and quality pads like Kool Stop salmon compound, you still get good strong braking. Folks who have ridden decent bikes for a long time already know this.
For most people's wheel and motor combinations, regen starts out with "wholly inadequate" braking power in the best case. And until more motor manufacturers follow Grin's lead in supplying better torque arm interfaces, it's asking for show-stopping trouble anyway.
None of us do.Balmorhea said:How did you title and register your motorcycle?
Steph said:I do hope so.
My daily commute involves about 100m down in the morning and well... a more tiring evening route.
My ideal scenario is actually having some supercap (probably not going to happen, it costs..) that would charge in the morning to give me the kick I need in the steepest sections of the way back. I don’t even need an assist all the way up because this cycling commute is my only physical activity and I want to hold on to it.
The way down is interrupted by some junctions that do require braking and I do feel changing my pads too often; I’m also interested in reducing the wear there.
I read a few comments here about axle nuts getting loose with regen, or torque arm being too weak... in my case, I am rather considering a friction drive with a kind of disengaging mechanism: light, minimalist and only involved in the train when relevant.
So I’m not talking from experience (yet), but I’ll put a vote on yes they do ... hopefully.
Lastly, it’s more a philosophical consideration, but I’m more interested in the pursuit of efficiency than raw power and dissipating energy into heat as braking method feels so sub-optimal...
Cheers
Steph said:Hub motor is not possible for me. There’s already a rohloff at the back, and the front is too likely to loose traction going uphill.
Steph said:I saw some designs on the forum using small rc servo to engage the motor; I’ll rather go along this line, or add lever like for the fork lock.
donn said:I'm in the city, where I will have to stop every few blocks. That's most of my regen braking. I don't normally brake to bring the battery level up, I brake when I have to slow down or stop, on grades rarely over 4%, which gets me in the range of 10-12% recovery, 12-14% in CA math. I don't think it's meaningless.
- Those speeds are so ridiculous I have to wonder if you've ever ridden a bicycle. You might be able to hit 40 on less than a 10% grade, in a full tuck, but long hills that steep aren't a common feature in my "very mountainous" area, as in nonexistent. A much heavier quasi-motorcycle ride might be able to get to 50 under some relatively conceivable circumstances, but ... you're the guy who speaks for "95% of us"?
- If you're so new to bicycling that you aren't sure what brakes are for, here's one example: there's an intersection at the bottom of the hill, and you will have to stop. Or, you're going to have to turn. Inspired by these examples, you may be able think of other reasons why you might use your brakes. Each one is an opportunity to recover some watts via regenerative braking.
99t4 said:trackebike, your description of your local topography is a utopia of non-braking cycling bliss. Not everyone is as fortunate.
trackebike said:55 miles of descent? Are you kidding me? This is not typical. There are very few places in this world where you can do this. It is not even a descent that you would see in the Tour de France! Its not even a round trip ride! So, I call "No fairsies" you can't use that as a justification for regen and you are purposefully being misleading.
trackebike said:Coasting beats regen..and coasting is the norm.
E-HP said:trackebike said:Coasting beats regen..and coasting is the norm.
Just to be clear, just because a bike has regen doesn't mean that it can't coast. Regen is something you activate, so you can coast to your hearts content.
Balmorhea said:E-HP said:trackebike said:Coasting beats regen..and coasting is the norm.
Just to be clear, just because a bike has regen doesn't mean that it can't coast. Regen is something you activate, so you can coast to your hearts content.
Most DD motors don't coast worth a damn. Proper bicycle-style coasting requires a one-way clutch.
E-HP said:Balmorhea said:E-HP said:Just to be clear, just because a bike has regen doesn't mean that it can't coast. Regen is something you activate, so you can coast to your hearts content.
Most DD motors don't coast worth a damn. Proper bicycle-style coasting requires a one-way clutch.
So the discussion shifted? I like my DD motor, but I've never tried gearless. I'll probably try mid drive before gearless though.