Search found 123 matches

by alan
Mar 26 2019 1:41pm
Forum: E-Bike General Discussion
Topic: BionX
Replies: 62
Views: 3498

Re: BionX

That being said, If I found a mint condition 1984 Mercedes 300D with very low miles, I'd buy it and I would not care a bit that they are no longer made... I owned a 1984 Mercedes 300TD-T (turbo diesel station wagon). Great handling and brakes, and power, once off the line. EVERYTHING ELSE ABOUT THA...
by alan
Dec 08 2018 11:05am
Forum: E-Vehicles General Discussion
Topic: The economics of scooter rentals.
Replies: 85
Views: 6520

Re: The economics of scooter rentals.

"Your fleet of 50 is producing $81,000 per month in fares. OK, so you need to hire a guy to maintain the scooters. 1 guy working full time could probably handle them all. There goes $30,000, leaving you with $51,000 a month." Correcting the $30K employee to the closer to $60K you later use, I believ...
by alan
Jul 23 2018 8:48am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

I always wonder how many of these "inspections" are actually done or just checked off and charged. I've seen videos where they have documented that many of the services are often skipped, especially if they don't help justify an additional cost service that the owner is asked to pay for. I asked my...
by alan
Jul 21 2018 10:15am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

Alan , im happy to compare the details of service cost if you really think its relavent..but the simple fact is that the cost of service parts and materials on any modern car , EV, or ICE, is minor compared to the labour cost. This may be true for the first 20Km of service where other than an oil c...
by alan
Jul 20 2018 9:33am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

Changing BRAKE FLUID? Are you serious? The brake fluid absorbs water right out of the air (unless your brake lines are hermetically sealed!). Over time, the water content will increase to dangerous levels, meaning using the brakes will heat up the brake fluid enough to cause water boiling, which is...
by alan
Jul 18 2018 8:50am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

Word semantics :roll: Every EV has a transmission . it may not be a multi speed transmission, but a single speed transmission is still a box full of gears and shafts and bearings in an oil bath. ( ask Tesla owners who had several of them changed out due to bearing fails) Using the same word, transm...
by alan
Jul 18 2018 6:58am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

The classic Myth of one motor being called a Torque Motor and the same motor but a different winding being called a Speed Motor. = False! Amen. First thing that came to mind for me was actually that high voltage / low amps somehow equals higher efficiency versus high amps / low volts. Heat loss is ...
by alan
Jul 16 2018 8:42am
Forum: General Discussion
Topic: Any Lawyers Here?
Replies: 28
Views: 1499

Re: Any Lawyers Here?

You guys can piss and moan about lawyers all you want, and there are plenty of lawyers that actually deserve such scorn. But, remember that it is only about 97% of all the lawyers out there who give all the other lawyers a bad name.
by alan
Jul 16 2018 7:07am
Forum: E-Vehicles General Discussion
Topic: EV Myths - add your own!
Replies: 107
Views: 4971

Re: EV Myths - add your own!

Here are a few.. * EVs are economical to own and run * EVs are cheap to service. * EVs do not need a transmission. * EVs will outnumber ICEs within 10 years My i3 is dirt cheap to own and run, with the ONLY scheduled service being a brake-line flush every 2 years. It is now four years old, and has ...
by alan
Apr 17 2018 9:24am
Forum: Items for Sale - Used
Topic: FS: Two 26" Bionx P350 kits
Replies: 3
Views: 881

Re: FS: Two 26" Bionx P350 kits

Sold. Thanks, Endless Sphere.
by alan
Dec 23 2017 11:16am
Forum: Items for Sale - Used
Topic: FS: Two 26" Bionx P350 kits
Replies: 3
Views: 881

FS: Two 26" Bionx P350 kits

These are older units with all parts, but depleted batteries. Both have the newer bus design. One (grey) is eight years old with about 15K miles and has the throttle integrated with the console display. The other (white) is about five years old with about 12K miles and has the newer quieter and torq...
by alan
Jun 04 2017 11:02am
Forum: General Discussion
Topic: The paris accord
Replies: 7
Views: 813

Re: The paris accord

Inot a trump fanboi but he is correct when he sez it's all a money making scam. i would add it's also about further eroding freedom & more government control. any benefit to the environment is secondary & purely incidental. Pollution is real. It is also a scam in that the main polluters don't see t...
by alan
May 04 2017 10:23am
Forum: General Discussion
Topic: Resolved: NO SUCH THINGS AS TRAFFIC "ACCIDENTS"
Replies: 3
Views: 433

Re: Resolved: NO SUCH THINGS AS TRAFFIC "ACCIDENTS"

Pretty quixotic to try to redefine words. Accident and collision are two different things, even if they are not always properly used. You can have an accidental collision or an intentional collision. Accident alone is appropriate in conversational English (although perhaps not on a police report or ...
by alan
Apr 18 2017 9:32am
Forum: E-Bike General Discussion
Topic: how does this transmission work???
Replies: 5
Views: 704

Re: how does this transmission work???

A motor and generator are the same thing. An applied voltage to a motor/generator determines how fast it wants to turn. If it is turning faster, it generates power (current), which causes a drag that tries to slow it down. If it is turning slower, it pulls power (opposite direction current) to try t...
by alan
Mar 04 2017 9:56am
Forum: General Discussion
Topic: ...And that's why I don't like Intersections....
Replies: 10
Views: 1248

Re: ...And that's why I don't like Intersections....

This was over 4 years ago on my way home from work (been retired 3 years!). I was heading south on College at a red light on Broadway. I was in the bike lane stopped next to a car. A hedge row blocked nearly all vision for me and the car to the nearest west-bound bike lane to our right. Those shrubs...
by alan
Dec 11 2016 11:57am
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 384
Views: 62052

Re: Kepler Friction drive comes of age.

No spring in this design. Just another complication and unnecessary cost. Although the kick spring has its merrett, I have never been happy with how finicky it made the drive setup. Using a cable activation to get the drive to make light contact with the tire is so much more reliable. Just an idea....
by alan
Mar 22 2016 7:53am
Forum: E-Vehicles General Discussion
Topic: What Electric Automobile do you drive? Picture thread!
Replies: 14
Views: 1802

Re: What Electric Automobile do you drive? Picture thread!

ELECTRICi3.jpg
ELECTRICi3.jpg (206.11 KiB) Viewed 695 times
My EV is a i3 spaceship.
by alan
Mar 12 2016 8:18am
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

Honda already figured out a clever way to skip the very meaningful low power cruising losses. The result is a huge and heavy full size accord that has better performance and economy than the tiny engine lightweight CRX. This Honda hybrid is not a good comparison for this discussion. Honda started w...
by alan
Mar 11 2016 12:20pm
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

Show me a real world example of this and I will edit my comment. Are you saying the whole shaft slides back and forth? Are you saying the gear teeth will catch the two different shafts while spinning at different speeds? I have seen such a tranny used, but not in a transportation application (it wa...
by alan
Mar 11 2016 12:07pm
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

I considered the tesla direct drive as in the ratio of motor to wheel is always the same. ... I will quit saying direct drive unless talking about hub motors. You are correct that a hub motor is a direct drive. Even if the motor is connected to the wheel through a drive shaft with CV joints, I woul...
by alan
Mar 11 2016 11:43am
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

One side note- I have not seen much high scholastic study of magnetism on a quantum level. The field is fairly stagnant and held hostage imo by classical laws and thinking. I consider matter, magnetism, light, sound, and electricity to all be potentially the same thing- energetic wavelengths. ... I...
by alan
Mar 10 2016 11:35pm
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

A simple two-speed tranny can have an input shaft and an output shaft (exactly like a reduction gearset with the same number of bearings, having the same loading based almost entirely on the torque loads and not the mass of the gears) with two gears on each shaft. Say the input shaft has a large ge...
by alan
Mar 10 2016 8:17am
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

When ever you have additional gears to select they have friction points no matter how you try to build it. The gears not in use will be rolling on bearings at different speeds then the shaft causing drag/inefficiencies and they will have some sort of device like a shift fork to either move the dog ...
by alan
Mar 09 2016 10:46am
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

In the tesla example, if you were to make the motor roughly 3 times the diameter, you would have roughly the same low end torque in a direct drive setup. It should also be able to rev and pull way past the current cars top speed with the same technology. No? Larger motors will have lower max RPMs b...
by alan
Mar 08 2016 1:35pm
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 80616

Re: Conclusive proof gearboxes are awesome.

Trannies can be over 95% efficient. Motors can be more efficient, but are easily pushed outside that efficiency band down into the 75-85% range. A tranny can help keep a motor in a higher efficiency operating band, and that could more than make up for the tranny losses. Note that anything other than...