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OT: Nitrogen filled tires

G

Guy Macon

John said:
Nobody would buy either one. But that doesn't make the ideas much less
interesting. You can never develop new stuff if you whack-a-mole every
idea as soon as it pops up.

That one just went into my quote file:

"You can never develop new stuff if you whack-a-mole
every idea as soon as it pops up." -John Larkin

Thanks!
 
G

Guy Macon

Spehro said:
It may be a personal attack, but the current value of "unprovoked"
would depend on the time constant.

He didn't like some things I did, so I apologized several times and
stopped doing them. What more can I do? I gave him no reason to
start flaming me out of the blue many months later. Human nature
being what it is, I am tempted to reply in kind -- especially
considering that the comparison is not only insulting but factually
incorrect, but instead I will once again ask Jim Thompson this:
What exactly do you want? Do you want another apology? Do you
want me to repeat once again what I wrote before, which is that
I carefully considered your objections and concluded that you
were right? Or are you determined to simply flame me forever no
matter what I do?

I just want to have technical discussions on sci.electronics.design
without all the drama. Surely Jim can find more deserving targets
for his personal attacks.
 
C

ChairmanOfTheBored

He "pulled it" from the basic fact that oxygen is roughly 20% of the
atmosphere and thus the partial pressure of oxygen at one atmosphere
is 20% of one atmosphere -- 3 psi.

Bullshit. ALL the gas down here at sea level is at the same pressure.
It is a PARALLEL circuit!
 
C

ChairmanOfTheBored

That one just went into my quote file:

"You can never develop new stuff if you whack-a-mole
every idea as soon as it pops up." -John Larkin

Thanks!

You're an idiot, he's an idiot, and his remark is retarded.
 
J

John Larkin

You're an idiot. 2.5 inches of HIGHLY compressed air is a LOT more
than that at ambient pressure. It's like a battery. You have to have
more pressure than the fill pressure to overcome the valving and actually
get the volume INTO the tire.

Try again.

OK, then show us your calculations.

And by the way, what's the value of R2?

John
 
J

John Larkin

I have a 6 inch long, 150 psi hand pump used to pressurize the rear
shock on my Mnt bike. When it is filled, it takes nearly a full stroke
on the pump, compressing the 6 inch by .75 inch bore all the way to the
bottom of the travel, before it adds just a tiny spurt to the shock. You
guys are idiots to think that high pressure "topping off" is a low energy
task.

Car tires usually run about 32 psi.

John
 
J

John Larkin

You're an idiot, he's an idiot, and his remark is retarded.

And we design electronics, and you don't. You can't, not because
you're too dumb, but because you refuse to do simple math, and because
you refuse to consider new ideas. And you won't fix either problem
because you're too damned stubborn.

Pbbbbbttttt!

John
 
M

Martin Brown

Bullshit. ALL the gas down here at sea level is at the same pressure.
It is a PARALLEL circuit!

If you must parade your total ignorance and stupidity in this
newsgroup try not to shout.

The partial pressure of O2 at STP 1 atmosphere is around 3psi (in
arcane units). This is pretty standard air chemistry - 4 out of 5
atoms that hit the container walls are unreactive nitrogen and only 1
in 5 oxygen.

When you have compressed air at 5atm it contains the functional
equivalent of 1 atm of pure oxygen and will provide almost as much
reactivity in a fire as pure O2 at STP 1 atm. A mixed gas like air is
all at the same bulk pressure but for calculations you can split it
into equivalent partial pressures of its constituents.

It is a routine method for computing the outcome of gas phase
reactions.

Regards,
Martin Brown
 
R

Rich Grise

He "pulled it" from the basic fact that oxygen is roughly 20% of the
atmosphere and thus the partial pressure of oxygen at one atmosphere
is 20% of one atmosphere -- 3 psi. He clearly specified oxygen, but
you replied as if he was writing about air. Please note the context:
the discussion was comparing combustion inside a tire (higher oxygen
partial pressure, combustible gasses accumulate) with combustion
outside a tire (lower oxygen partial pressure, combustible gasses
dissipate). So the partial pressure of oxygen is relevant and the
total pressure of all atmospheric gasses is not.

If you look at the posts in most technical newsgroups, you will find
that (with certain notable exceptions), the posters who calmly present
arguments and calculations are almost always right, those who use a
lot of ALL CAPS and exclamation! points!! are less often right, and
those who call people idiot, moron, etc. are almost always wrong.
You may wish to either modify your communication habits so as to
contain fewer personal comments or use a pseudonym to shield yourself
from negative consequences.

Well, I will cop to one glaring error - if the air pressure in a tire
is, say, 150 PSI, then the partial pressure of O2 is <ahem> "only"
30 PSI. :)

And yes, SR-71 tires are inflated with that much pressure, AFAIK.
In any case, it's a lot more than a car tire!

Cheers!
Rich
 
R

Rich Grise

....

Yup. Even with your ultra-conservative numbers, it works.

And calibrate the piston crank/eccentric so that rated tire pressure will
stall it. :)

Cheers!
Rich
 
R

Rich Grise

...and your reason for engaging in an unprovoked personal attack is?

He's a neocon, therefore not subject to the normal rules of civilized
etiquette.

Hope This Helps!
Rich
 
G

Guy Macon

Rich said:
Temporo-Mandibular Zone?
Terribly Mexicanized Zone?

Don't keep us guessing!

Perhaps you have seen the TV show "TMZ" or the web site TMZ.COM?
The show is on every night at 11:30 PM for those of us lving in
Southern California and interested in that sort of thing.

From TMZ.com:
What does TMZ stand for?
'TMZ' stands for "Thirty Mile Zone," a term which originated
in the 1960's. Due to the growth of 'on location' shoots,
studios established a "thirty mile zone" to monitor the
regulations of shooting throughout Hollywood. The zone was
originally centered in Los Angeles around the old offices
of The Association of Motion Pictures and Television Producers
at Beverly and La Cienega Boulevards in California. It was
often said that "Everything entertainment happens in the
'Thirty Mile Zone.'" So essentially, the "Thirty Mile Zone"
represents the epicenter of Hollywood! Interesting, huh?!


From Wikipedia:
http://en.wikipedia.org/wiki/Thirty_Mile_Zone

Studio zone (also thirty-mile zone) is a term used in the American
entertainment industry to describe the area within a thirty-mile
(50 km) radius from the intersection of Beverly Boulevard and La
Cienega Boulevard in Los Angeles, California. In addition, the
studio zone includes the Metro-Goldwyn-Mayer Conejo Ranch property,
although it technically lies outside of the zone's radius.

Entertainment industry unions use this area to determine rates
and work rules for union workers in the entertainment industry.
For instance, International Alliance of Theatrical Stage Employes
contracts state:

"Studio rates and working conditions shall prevail for all work
performed within the studio zone; however, for newly-called
employees and those employees notified on the previous day
prior to their departure from the studio (or the zone location)
to report at the zone location, work time shall begin and end
at the zone location; otherwise, work time shall begin and end
at the studio. Such work time includes travel time both ways
between the studio and the zone location."

"Studio rates" are generally lower than "distant location rates,"
which would need to be paid (in addition to travel time and mileage)
for work outside the studio zone.

Because it is much more expensive to film outside of the studio
zone, television producers prefer to film within the zone (and
go to great lengths to select and dress sets appropriately) even
when a show's claimed setting is just outside the zone. A famous
example of this phenomenon was The OC, which was primarily filmed
in the Los Angeles County Beach Cities within the zone rather than
in the real Orange County, which literally sits on the zone's border.

The initials of the Time Warner tabloid news Web site TMZ.com
stand for "Thirty Mile Zone," an alternate name for the studio
zone.
 
R

Rich Grise

He didn't like some things I did, so I apologized several times and
stopped doing them. What more can I do? I gave him no reason to
start flaming me out of the blue many months later. Human nature
being what it is, I am tempted to reply in kind -- especially
considering that the comparison is not only insulting but factually
incorrect, but instead I will once again ask Jim Thompson this:
What exactly do you want? Do you want another apology? Do you
want me to repeat once again what I wrote before, which is that
I carefully considered your objections and concluded that you
were right? Or are you determined to simply flame me forever no
matter what I do?

I just want to have technical discussions on sci.electronics.design
without all the drama. Surely Jim can find more deserving targets
for his personal attacks.

Well, there's me, but he filtered me quite some time ago - rather
than respond to something he doesn't like, he just pretends it isn't
there, like a good little neocon. It's the same syndrome that makes
the warmingists deny the effects of Solar output, water vapor, Earth's
orbital perturbations, axial precession, clouds, etc. on planetary
temperatures.

Cheers!
Rich
 
R

Rich Grise

What is wrong with the usual approach of instaling a compressed air
rotary joint on each axle, connected to the tire through a Schrader
valve in the wheel (so it holds air when removed). The stationary end
of each rotary joint connects to a pressure transducer and fill (from
engine driven compressor) and vent solenoid valves, controlled by the
tire inflation computer. A dashboard control lets the driver adjust
tire inflation from inside, so for instance pressure could be dropped
to 20 PSIG for driving on sand and back to 32 for highway driving, or
upped a bit for driving in rain. This arrangement works pretty well
on my Yugo :).

Yeah, but it's not as much fun to talk about! ;-)

Cheers!
Rich
 
M

Michael A. Terrell

Jim said:
Also,often found on the side of the road after passing a pothole. ;-)


Florida had another bumper crop of potholes, this year. :(


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

John Larkin

Actually, Guy is in southern CA, and John's in San Francisco somewhere.
http://www.guymacon.com/
http://www.highlandtechnology.com/

We're not "somewhere in San Francisco." If you Google Earth for San
Francisco, our building is clearly visible in the default view. Google
has, for some reason, decided that the center of San Francisco is an
HVAC unit on the roof of the BofA computer center across the street.

Maybe that HVAC unit actually rules the planet. Or the universe.

I need more coffee.

John
 
J

John Larkin

Show me where he or I either one said it was or is impossible. We
didn't. We said "will not work". There is a difference.

Don't weasel. It's undignified.

John
 
J

John Larkin

On Mon, 15 Oct 2007 16:23:39 -0700, John Larkin



[snip]

No,he's right;those wheel spinners use low friction bearings,and any
crud will stop them.

So, you won't do the math either.

John





Math without practical experience is useless.

Practical experience without math is amateur guesswork.

John

John, I think you've got yourself out on a limb, on the wrong side of
the saw ;-)

I think it's you who has to put some numbers to it.

...Jim Thompson

I already did. And Guy confirmed it.

And you are both being horse with blinders on idiots about it.

Let alone the fact that nobody in their right mind is going to want to
ADD weight to their wheel.

So, what's the value of R2?

John
 
J

John Larkin

Said "air" is typically perpendicular to the blades of said windmill.

The new word for today is "Torque arm".

No, you've used that one already. A word-for-today can only be used
once.

John
 
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