Discussion
stig mills said:
That would be a cool dude driving one of those beasts.
Why dont we go for handle bars, no rack=less cost and less weight. Is that where your coming from Hoop?
StuartWhy dont we go for handle bars, no rack=less cost and less weight. Is that where your coming from Hoop?
Check this for something similar.....
http://www.roadstercycle.com/
Here is a Trev. Not bad to look at but I,m sceptical about the claim range of 150km and 120kmh with only 40kg of batteries.
www.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
www.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
stig mills said:
Here is a Trev. Not bad to look at but I,m sceptical about the claim range of 150km and 120kmh with only 40kg of batteries.
www.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
it does say city driving - which usually means it's taken at more like 20mph. Only 50-75 miles when they were doing ~50mphwww.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
stig mills said:
Here is a Trev. Not bad to look at but I,m sceptical about the claim range of 150km and 120kmh with only 40kg of batteries.
www.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
I remember seeing it a few months ago, and it looks really interesting, eventhough tandem seating is always a risk with two seaters..........www.unisa.edu.au/solarcar/trev . What do you guys think, is that possible?
I could see a similar dsign as a single seater, and if you use the Myers 3wheeler as a design parameter, the TREV could be sold very easily for 35.000 $.
Did anybody see the ZAP ALIAS 3wheeler concept ? it seems like Lotus is involved in the design....or that is what is claimed.
http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
Edited by fuoriserie on Thursday 31st January 19:39
fuoriserie said:
Did anybody see the ZAP ALIAS 3wheeler concept ? it seems like Lotus is involved in the design....or that is what is claimed.
http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
I'm rather surprised at the weight of that - ~750kg for a 3 wheeled vehicle seems bloody heavy! http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
Edited by fuoriserie on Thursday 31st January 19:39
ETA: A further thought... if it's front wheel drive, and uses hub motors, so one in each wheel, how are they overcoming the lack of diff? Are they using some form of complex control system to speed up one wheel, or are they just letting the thing try and scrub its way around the corners?
Edited by Davi on Thursday 31st January 20:17
Davi said:
fuoriserie said:
Did anybody see the ZAP ALIAS 3wheeler concept ? it seems like Lotus is involved in the design....or that is what is claimed.
http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
I'm rather surprised at the weight of that - ~750kg for a 3 wheeled vehicle seems bloody heavy! http://blogs.edmunds.com/Straightline/4195
it makes me wonder if a front wheel drive electic 3wheeler makes moe sense?, it sure easier to drive than a mid-engine 3wheeler......
Edited by fuoriserie on Thursday 31st January 19:39
Check their website, it say 733Kg.........
http://www.zapworld.com/electric-vehicles/electric...
Edited by fuoriserie on Thursday 31st January 20:15
Ozzie Dave said:
Davi, I know of an electric unit thats in prototype here, batteries at the back, small contol box and motors to each driven wheel (in this case 4wd) the trick is to stop thinking mechanically like a car, think electronically.
Dave
Unfortunately electronics aren't my strongest point Dave
I get the basics, enough to make my own brushless motors, but all the nitty gritty tends to confuse me a bit! Any links to the unit you're on about?No Stig, not handlebar steering, it's more joystick steering I'm thinking about. Actually, two levers. I can't make it this week as all the buses have arrived at once, I'll endevour to get down next week. Italo, we have been developing a single wishbone in carbon fibre. The idea was that it would offer some damping without adding weight and complexity. In reality, it has been difficult to persuade the material to bend on a single plane. I would really like to drive a three wheeler with rear wheel suspension only to see how bad it is. I suspect it would be pretty uncomfortable and skitish, but it would simplify things a great deal if it was acceptible. My package places the drivers bum close to the rear wheel. What software are you using Davi, is it Solidworks?
hoopdiddy07 said:
No Stig, not handlebar steering, it's more joystick steering I'm thinking about. Actually, two levers. I can't make it this week as all the buses have arrived at once, I'll endevour to get down next week. Italo, we have been developing a single wishbone in carbon fibre. The idea was that it would offer some damping without adding weight and complexity. In reality, it has been difficult to persuade the material to bend on a single plane. I would really like to drive a three wheeler with rear wheel suspension only to see how bad it is. I suspect it would be pretty uncomfortable and skitish, but it would simplify things a great deal if it was acceptible. My package places the drivers bum close to the rear wheel. What software are you using Davi, is it Solidworks?
The 70's california commuter has something similar joystick steering system, visible in the attached pictures.I was thinking about the front sunspensions, and think that a simple 2cv inspired design could work real well, a simple solution and effective on a 3wheeler design. If you want to go high-tech, you could have diecast alluminum wishbones......
Edited by fuoriserie on Friday 1st February 09:42
Edited by fuoriserie on Friday 1st February 09:43
Edited by fuoriserie on Friday 1st February 09:44
There is a problem with a joystick, in many countries steer by wire is illegal, in-case of a system failure (most electric systems need computer control to get the most out of the batteries) so its not just the electronics, but more importantly the software that becomes critical. The problem being in many cases the 'mechanics' don't like the 'electrics' ie most people are biased one way or the other. For it to be successful then it must be a fusion of the two, ie a mechanical steering system with a software system that must imitate a differential and a gearbox. the easiest way to do this is obviously by having both front wheels powered and computer controlled.
This kind of thing is not cheap, but by working with other companies and research bodies it is available, especially as small reasonably powerfull computer systems are now available below the $400 level unix based for reliability, even better may be to use a system with a firmware (DOM) drive and use a touch panel as the display, easy, modular, and should it fail , just power down and re-boot or swoop out for ease of service, the outputs could go easily to a PCB like use for a small homebuilt CNC profiler/cutter that is designed for multiple stepper motors.
Dave
This kind of thing is not cheap, but by working with other companies and research bodies it is available, especially as small reasonably powerfull computer systems are now available below the $400 level unix based for reliability, even better may be to use a system with a firmware (DOM) drive and use a touch panel as the display, easy, modular, and should it fail , just power down and re-boot or swoop out for ease of service, the outputs could go easily to a PCB like use for a small homebuilt CNC profiler/cutter that is designed for multiple stepper motors.
Dave
Another electric wheel Hub motor......I think NASA id using similar motors for their Robots.
http://www.wavecrestlabs.com/products-motors.php
http://www.wavecrestlabs.com/products-motors.php
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