by yesplease » Wed 21 May 2008, 23:14:46
$this->bbcode_second_pass_quote('roccman', 'I') am looking for an electric scooter that is built well...any input is appreciated.
Build it yourself and do it well. It'll be cheaper than something commercial and well as have characteristics suited to your tastes.

$this->bbcode_second_pass_quote('Professor Membrane', ' ')Not now son, I'm making ... TOAST!
by yesplease » Wed 21 May 2008, 23:15:00
$this->bbcode_second_pass_quote('JRP3', 'H')ow can a much lighter vehicle such as a scooter be less efficient than a heavier car?
By having the drag coefficient of a small car. In city, they tend to be more efficient for the average brakes/gas/brakes/gas driver, but on the highway above ~60mph ya might as well have a decently aero small car.$this->bbcode_second_pass_quote('JRP3', 'D')riving conditions are a concern, but I'd think a 2 wheel vehicle could be much more efficient than any car. You have much less rolling resistance with only 2 narrow tires, much less weight to move, and there is no reason you can't improve the aerodynamics of a 2 wheeler.
If the aero is improved, yes, but outside of Vetter's competitions there hasn't been much AFAIK.$this->bbcode_second_pass_quote('JRP3', 'A')ll my sportbikes had full fairings, which also helped protect you from weather to some degree. Without having to leave large openings to cool an ICE you could make the fairings very slippery.
A lot of sportbike fairings, unless designed properly, end up increasing reference area proportionally to the drop in drag coefficient, with certain notable exceptions.$this->bbcode_second_pass_quote('JRP3', 'S')ince the vehicle is so much lighter you don't need as many batteries, which makes more advanced, expensive battery technology feasible at a reasonable cost.
Only if they tend to do relatively slow city stuff.
$this->bbcode_second_pass_quote('Professor Membrane', ' ')Not now son, I'm making ... TOAST!
by JRP3 » Wed 21 May 2008, 23:39:19
$this->bbcode_second_pass_quote('', 'J')RP3 wrote:
Since the vehicle is so much lighter you don't need as many batteries, which makes more advanced, expensive battery technology feasible at a reasonable cost.
$this->bbcode_second_pass_quote('', '
')Only if they tend to do relatively slow city stuff.
Here's 30 miles on 6 12 volt 50 ah batteries.
Bike
I don't think you can do that in a car.
by yesplease » Thu 22 May 2008, 02:31:35
$this->bbcode_second_pass_quote('JRP3', '')$this->bbcode_second_pass_quote('', 'J')RP3 wrote:
Since the vehicle is so much lighter you don't need as many batteries, which makes more advanced, expensive battery technology feasible at a reasonable cost.
$this->bbcode_second_pass_quote('', '
')Only if they tend to do relatively slow city stuff.
Here's 30 miles on 6 12 volt 50 ah batteries.
BikeI don't think you can do that in a car.
W/ a top speed of 53mph, I'm pretty sure that qualifies as only slow city stuff barring of course nice flat highways with little wind.

LRR tires aren't commonly available for motorcycles AFAIK and the drag coefficient, even with a sports bike, is in the .6+ range. So, even though it's ~1600lbs less than, for example, a efficient EV metro conversion, at 60mph it needs ~35% more power. Otoh, at 30mph the Metro needs ~35% more power, so it depends on what the driving is like. At city speeds of ~30mph, the bike is the clear winner, but at highway speeds of ~55mph+ the efficient car is. Admittedly due to having more available in terms of tire selection and easier aeromods. With aeromods the bike would probably be able to keep up at slower highway speeds, but aeromods on a bike are few and far between AFAIK, while otoh there's even a post in the forum w/ Basjoos' car in it IIRC.
$this->bbcode_second_pass_quote('Bill Ruzinsky', 'I') have been very satisfied with how it turned out. It's a lot of fun and truly makes a practical
around town vehicle.
$this->bbcode_second_pass_quote('Professor Membrane', ' ')Not now son, I'm making ... TOAST!
by yesplease » Thu 22 May 2008, 18:55:28
$this->bbcode_second_pass_quote('JRP3', 'I') don't know, I think there are aeromods available on a bike. Most fairings are designed to force air into and around the engine. Block off and smooth that front section and I would think you could make a large improvement. Make a nice smooth aero fairing from scratch and you might do even better.
My Seca Turbo and FJ1100 always got 40 + mpg, and that was often far beyond regular highway speeds

The only car I've ever had that could come close was an 89 Dodge Colt, obviously not driven anywhere near the speeds the bikes were.
From what I've seen, most of the aeromods on a bike either provide for comfort, or aid at high speeds in terms of handling/stability/downforce. Not to say
aero EV motorcycles wouldn't see great efficiency.

$this->bbcode_second_pass_quote('Professor Membrane', ' ')Not now son, I'm making ... TOAST!