On Apr 7, 9:50*am, Cliff wrote:
On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

* What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:


I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

What rear wheels?
--
Cliff


If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

On Apr 7, 12:36*pm, Jeff Wisnia
wrote:
wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

*What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?
Jeffry Wisnia

I do not speak for them and can't be too specific about details but in
my experience they are within the range of shoes, better than dress
shoes and maybe worse than hiking boots. Both the original factory in
Manchester and the newer one in Bedford NH are on steep parts of the
bank of the Merrimack river, I've seen a Jeep unable to climb the
pavement there on a bad winter day. The dirt trail behind the factory
runs along the river and crosses ravines, some of them quite steep and
slippery.

I only worked part time and on call as a temp there and never had a
chance to ride one outdoors on ice, plus the one they loaned me didn't
have the wide lugged off-road wheels. I may not be the person to give
"reasonable" advice anyway, since I used to run my dirt bike on
snowmobile trails and frozen lakes with unstudded trial tires.

Jim Wilkins

"Jeff Wisnia" wrote in message
eonecommunications...
wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:


I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

What rear wheels?
--
Cliff


If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Actually Segways handle SF hills ok. There is at least one tour company
that uses Segways.

On Apr 8, 2:37*am, "Calif Bill" wrote:
"Jeff Wisnia" wrote in message

eonecommunications...





wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels..

*What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Actually Segways handle SF hills ok. *There is at least one tour company
that uses Segways.- Hide quoted text -

- Show quoted text -

There's a lot less mass to get up the hill. Think of one of the simple
machines, the inclined plane. As the mass of the object increases, the
force (work being done) increases.

wrote in message
...
On Apr 8, 2:37 am, "Calif Bill" wrote:
"Jeff Wisnia" wrote in message

eonecommunications...





wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Actually Segways handle SF hills ok. There is at least one tour company
that uses Segways.- Hide quoted text -

- Show quoted text -

There's a lot less mass to get up the hill. Think of one of the simple
machines, the inclined plane. As the mass of the object increases, the
force (work being done) increases. Small mass, small amount of batteries
also. More hills, less distance traveled. I do see them on some hills, but
most are down towards North Beach and the Marina Green area. Smaller hills
than most.

On Tue, 7 Apr 2009 11:48:16 -0700 (PDT), wrote:

On Apr 8, 2:37*am, "Calif Bill" wrote:
"Jeff Wisnia" wrote in message

eonecommunications...





wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

*What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Actually Segways handle SF hills ok. *There is at least one tour company
that uses Segways.- Hide quoted text -

- Show quoted text -

There's a lot less mass to get up the hill. Think of one of the simple
machines, the inclined plane. As the mass of the object increases, the
force (work being done) increases.

Plus you get much of the energy back going down I think ...
--
Cliff

"Cliff" wrote in message
...
On Tue, 7 Apr 2009 11:48:16 -0700 (PDT), wrote:

On Apr 8, 2:37 am, "Calif Bill" wrote:
"Jeff Wisnia" wrote in message

eonecommunications...





wrote:
On Apr 7, 9:50 am, Cliff wrote:

On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear
wheels.

What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent
it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

Sure makes me wonder how it'd handle the snow and ice we get here in
Red
Sox Nation. (And it gets even WORSE elsewhere in the nation.)

And how would it handle steep San Francico style hills?

Anyone know how the Segway responds to icy sidewalks and steep hills?

Jeff

--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10^12 furlongs per fortnight.

Actually Segways handle SF hills ok. There is at least one tour company
that uses Segways.- Hide quoted text -

- Show quoted text -

There's a lot less mass to get up the hill. Think of one of the simple
machines, the inclined plane. As the mass of the object increases, the
force (work being done) increases.

Plus you get much of the energy back going down I think ...
--
Cliff

I doubt they have regenerative braking.

On Wed, 8 Apr 2009 17:53:40 -0700, "Calif Bill"
wrote:

Plus you get much of the energy back going down I think ...
--
Cliff

I doubt they have regenerative braking.


http://www.technewsworld.com/story/G...r-2-66751.html
"Features include electronic acceleration, steering and braking;
vehicle-to-vehicle communications; and autonomous driving and parking."

They'd probably lose too much energy without it.

http://www.segway.com/puma/
"Add in regenerative braking capability (being able to recharge while
decelerating) and that’s some smart battery tech."
--
Cliff

On Tue, 7 Apr 2009 07:06:12 -0700 (PDT), wrote:

On Apr 7, 9:50*am, Cliff wrote:
On Tue, 7 Apr 2009 06:35:51 -0700 (PDT), wrote:

I imagine it gently drops the front onto the casters, then brakes
hard, wasted time and then limited braking force from the rear wheels.

* What rear wheels?
--
Cliff

If it were on the main/drive wheels and the front casters, for the
purpose of describing vehicle dynamics it becomes appropriate to
describe the main/drive wheels as the 'rear' wheels.

Overall the vehicle has one (or two?) wheels in the back to prevent it
rolling over backwards, the main drive wheels, and two (looks like 2)
casters in the front.

Dave

I expect those firont & back casters in the prototype are
to keep it upright with the power off & not otherwise functional,
much less as a brake.

Any self-respecting pothole might eat it though .. with
a small dainty burp.
--
Cliff