Search found 683 matches

by donn
Dec 28 2020 6:37pm
Forum: EBike General Discussion
Topic: Middrive e bike v. car drag race
Replies: 103
Views: 2518

Re: Middrive e bike v. car drag race

It was a mid drive, but its large motor was in one gear, which would let it hit about 60 mph on the short straight sections of the track. Left hand drive, with the pedal gears intact on the right. At that point, what's the difference? Is a different motor, or could it have been a DD hub driving the...
by donn
Dec 17 2020 9:40am
Forum: EBike General Discussion
Topic: LiPO PSA - How Not to Bun Your House Down
Replies: 15
Views: 536

Re: LiPO PSA - How Not to Bun Your House Down

I guess the bright side is, you got outside, and with your pants on.
by donn
Dec 07 2020 12:20am
Forum: EBike General Discussion
Topic: 40mph commuter: slack hardtail on 29" tire or steep full-suspension on 26"?
Replies: 59
Views: 1373

Re: 40mph commuter: slack hardtail on 29" tire or steep full-suspension on 26"?

Moto! I sold my Moto Guzzi, but then I'm happy going a lot slower. At much higher speed, it's like the man said, you're learning from the motorcycle designers how to ... do what? Build a motorcycle, is what. Mine unfortunately weighed so much that in my decrepit old age I couldn't reliably right it ...
by donn
Dec 05 2020 2:23pm
Forum: EBike General Discussion
Topic: 40mph commuter: slack hardtail on 29" tire or steep full-suspension on 26"?
Replies: 59
Views: 1373

Re: 40mph commuter: slack hardtail on 29" tire or steep full-suspension on 26"?

i dont see any recumbents but when i was working on my boat in dry dock i did talk with a guy who has one and the last picture in the scorpion thread shows a concrete switchback ramp and he said he will fall over if he doesnt take his feet off the pedals when going through there. Yeah, that's chall...
by donn
Nov 25 2020 1:46pm
Forum: EBike General Discussion
Topic: Hill climbing commuter build
Replies: 23
Views: 958

Re: Hill climbing commuter build

It's important not to base consequential decisions on overly general rules.
by donn
Nov 23 2020 3:08pm
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

Well, I've wondered. I mean, lawn chair on wheels, I get that. Bed on wheels, sounds good - if you didn't have to look where you're going. I see there's a headrest. I don't know. The seat for me is essentially a little hammock. Like my Ryan Vanguard, or the 1980 Avatar 2000. https://bicycleman.com/w...
by donn
Nov 18 2020 8:09pm
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

As it happens, I'd have to be awful hungry to eat a hamburger, but peanut butter and pickle sandwich would be a treat from my childhood.
by donn
Nov 18 2020 1:07pm
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

Imagine this - if car racing organizations had banned Mustangs, Porsches, Corvettes, etc. I guess it's hard for me to imagine in a useful way. I don't know, did people use those cars in organized races? Who cares? Well, here I am riding recumbents, so maybe I'm the exception that proves the rule. B...
by donn
Nov 17 2020 11:11pm
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

Well, they have been excluded from racing, and that could have made some difference in popularity 50 years ago when people thought racing bikes were cool. If they'd really been excluded just because they were too fast, though, they'd be more popular than they are. I believe part of it is actually th...
by donn
Nov 16 2020 10:41am
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

So not having that much weight on the saddle in the first place because I'm riding like a roadie and standing the pedals makes it easy to unsaddle and put a foot on the ground when I have to stop. Well, I think that's how you do it, normally, on a bicycle. Motorcycle, you put your leg out from your...
by donn
Nov 15 2020 11:19am
Forum: EBike General Discussion
Topic: Making a new pedal assist system for ebike
Replies: 15
Views: 648

Re: Making a new pedal assist system for ebike

In RPM, revolutions per minute?
by donn
Nov 15 2020 11:15am
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

In a recumbent design, the farther out the front wheel, the less suspension matters out there. There are a few recumbent trail riding nuts, and they sometimes rig up front suspension, but on the road ... I have sometimes found that I've been riding around with the front tire practically flat, there'...
by donn
Nov 14 2020 12:58pm
Forum: EBike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 40
Views: 1534

Re: Your thoughts on frames and riding positions?

Bike E is the one, it has rear suspension. A rider living nearby has one with a rear hub motor and a 20 ah battery. He rides pretty fast and told me it works very well. His longest ride, if memory serves, is around 70 miles. Like Dogman's black bike in the pic, the bike E rider can't unweight and s...
by donn
Nov 12 2020 2:58pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

If there's a special setting for fixed regen appropriate to the GMAC as a geared hub, no one knows what it is. In case it's useful, I had already gone to the extreme of contacting Grin on this question, and just now received their thoughtful reply: We're not familiar with this controller, but I'd r...
by donn
Nov 09 2020 7:14pm
Forum: EBike General Discussion
Topic: Making a new pedal assist system for ebike
Replies: 15
Views: 648

Re: Making a new pedal assist system for ebike

I'm sorry. I don't understand that part could you please explain it Maybe it matters more to me than to most others, because my bicycle is a recumbent - I can't stand on one pedal and "push off" while I mount the bicycle, I have start in a seated position using only regular pedal power. A...
by donn
Nov 09 2020 3:29pm
Forum: EBike General Discussion
Topic: Making a new pedal assist system for ebike
Replies: 15
Views: 648

Re: Making a new pedal assist system for ebike

so maybe I should implement those two together and let the rider choose between them with the help of push buttons Of course it's up to you, but I suppose you're right that the sag in motor power under load is natural and acceptable. I mentioned starting because it seems to me to be one of the weak...
by donn
Nov 09 2020 11:12am
Forum: EBike General Discussion
Topic: Making a new pedal assist system for ebike
Replies: 15
Views: 648

Re: Making a new pedal assist system for ebike

Interesting. It seems like a somewhat awkward fit with common multispeed bicycle gearing. I can't really imagine how a cadence system could really work to provide a natural control, so despite my criticism, it looks like it's somewhat better. If I understand it correctly, the rider will find the bic...
by donn
Nov 08 2020 10:41pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

There's a megawatt Leaf motor? What "I could never use the full regen power of my leafmotor" means is he's where practically everyone with a direct drive hub is - we use only a fraction of the potential, because we don't want braking that's anywhere close to locking up the wheel. We'd be d...
by donn
Nov 08 2020 2:25pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

The limit voltage parameter always had to do with the voltage limit of the battery. It was a high voltage cutoff to prevent batteries from being overcharged. Once you hit the threshold, regen would stop working at the specified voltage. Really? I'm reasonably certain mine is set to 77V, which as yo...
by donn
Nov 08 2020 1:43pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

you could program your controller to take in 90 amps or much above that during regen if you wanted to, and both a DD and a MAC would cause your MOSFETs to explode. Or you could set it to a reasonable level and have it not explode.. either way, it is not the motor that determines the amount of power...
by donn
Nov 07 2020 2:43pm
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

I'm pretty sure you don't need variable regen for a GMAC, and you don't need a GMAC for variable regen Interesting! Which of the others offer it? Well, you do need a GMAC if it must be a geared hub motor. Otherwise it's direct drives. As far as I know other geared hubs have a freewheel - and none h...
by donn
Nov 07 2020 10:03am
Forum: EBike General Discussion
Topic: Geared Hub Motor Quality
Replies: 66
Views: 2684

Re: Geared Hub Motor Quality

I'm pretty sure you don't need variable regen for a GMAC, and you don't need a GMAC for variable regen. The only peculiarity to account for is that it has rather high resistance when unpowered, so a happy user will be one who always has the power on. Grin Baserunner/Phaserunner controllers make that...
by donn
Nov 03 2020 12:22pm
Forum: EBike General Discussion
Topic: The downside of more electric bikes
Replies: 32
Views: 1153

Re: The downside of more electric bikes

I think in areas where they have become common, with a good range from 250W rentals to higher powered stuff, the human powered crowd gets more used to the concept. I mean, it shouldn't take a real long time to figure it out, even for the most muscle-bound of thinker. They got used to cars having mor...
by donn
Oct 30 2020 10:37am
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3196

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

FWIW, on a twisty road, that motorcycle is a real workout. My core strength better than ever. One of the reasons I got rid of my Moto Guzzi - too heavy to be any fun until you really get going. I used to be able to right it when it fell over, albeit not easily, but the last couple times it seemed t...
by donn
Oct 27 2020 3:17pm
Forum: EBike General Discussion
Topic: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?
Replies: 124
Views: 3196

Re: How practical is 72v (or 60v) for a street legal direct drive set-up meant for climbing and sub 28 mph speed?

A fallacy that defies the laws of physics unless the energy expended for transportation also replaces exercise that would be done if not cycling. I tried to look it up, but all I could find was energy expenditure for cycling clearly written for someone who want to maximize it - and in the better so...