header pic

Perhaps the BEST B1G Forum anywhere, here at College Football Fan Site, CFB51!!!

The 'Old' CFN/Scout Crowd- Enjoy Civil discussion, game analytics, in depth player and coaching 'takes' and discussing topics surrounding the game. You can even have your own free board, all you have to do is ask!!!

Anyone is welcomed and encouraged to join our FREE site and to take part in our community- a community with you- the user, the fan, -and the person- will be protected from intrusive actions and with a clean place to interact.


« previous next »
Pages: 1 ... 40 41 [42] 43 44 ... 46   Go Down
Author

Topic: Texas and OU to where?!?!

 (Read 24596 times)

FearlessF

  • Hall of Fame
  • *****
  • Posts: 37789
  • Liked:
Re: Texas and OU to where?!?!
« Reply #574 on: August 12, 2021, 09:54:45 AM »
Quote from: CWSooner on August 12, 2021, 09:38:31 AM
I can remember the 85 mph speedometers of the '70s and '80s.  They were supposed to deter young drivers from seeing how fast they could go.
Speedometers are mechanical devices.  How would the relationship between rear-axle rotations and the speedometer reading start changing at some high-ish speed?  I'm not arguing that speedometers were accurate above 85, but I am saying that I don't see how that would have worked
An airspeed indicator becoming increasingly inaccurate under various conditions I get.  A speedometer going buggy above 85 I don't get.
well, if it's off one MPH at 65 and 2 mph off at 75, then over 85 it could get worse and worser
Logged
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

betarhoalphadelta

  • Global Moderator
  • Hall of Fame
  • *****
  • Posts: 12310
  • Liked:
Re: Texas and OU to where?!?!
« Reply #575 on: August 12, 2021, 10:19:33 AM »
I don't think speedometers are simple gear-driven devices where the axle rotation is directly proportional to the output. 

https://www.explainthatstuff.com/how-speedometer-works.html

My first car (85 1/2 Ford Escort with a 4-speed manual) had a speedo that would basically peg at about 85 regardless of how fast you went beyond that. So I had no clue what the car's max speed was--although I didn't think it was much beyond 85. I was on a road trip and because I wasn't feeling well, my buddy was driving. We were going through St Joseph MI which I've later learned is NOT someplace you want to speed... He had it in 4th with the pedal to the floor and, predictably, gets pulled over. 

He got a ticket for 93 mph, and that was the day I learned my car's maximum speed lol...
Logged

medinabuckeye1

  • Legend
  • ****
  • Default Avatar
  • Posts: 8941
  • Liked:
Re: Texas and OU to where?!?!
« Reply #576 on: August 12, 2021, 10:52:24 AM »
Quote from: utee94 on August 11, 2021, 07:36:22 PM
Entering Texas from Louisiana on I-10, in the town of Orange, Texas, there's a sign with mileage to El Paso, which is also on I-10.
That is the longest interstate run through one state.  There are actually 881 miles of I10 in Texas.  The mileage numbers run W->E and the last exit before the TX/LA line is Exit #878.  That is a LONG freaking drive.  
Logged

medinabuckeye1

  • Legend
  • ****
  • Default Avatar
  • Posts: 8941
  • Liked:
Re: Texas and OU to where?!?!
« Reply #577 on: August 12, 2021, 10:53:11 AM »
Quote from: betarhoalphadelta on August 12, 2021, 12:48:22 AM
I drive fast. Especially in west Texas where there's nothing for 100 miles in any direction.
I saw some 85 MPH Speed Limit signs out in West Texas and the patrol didn't even look up when I went by with the cruise set at 95.  
Logged

CWSooner

  • Team Captain
  • *******
  • Posts: 6072
  • Liked:
Re: Texas and OU to where?!?!
« Reply #578 on: August 12, 2021, 11:03:50 AM »
Quote from: betarhoalphadelta on August 12, 2021, 10:19:33 AM
I don't think speedometers are simple gear-driven devices where the axle rotation is directly proportional to the output.

https://www.explainthatstuff.com/how-speedometer-works.html

My first car (85 1/2 Ford Escort with a 4-speed manual) had a speedo that would basically peg at about 85 regardless of how fast you went beyond that. So I had no clue what the car's max speed was--although I didn't think it was much beyond 85. I was on a road trip and because I wasn't feeling well, my buddy was driving. We were going through St Joseph MI which I've later learned is NOT someplace you want to speed... He had it in 4th with the pedal to the floor and, predictably, gets pulled over.

He got a ticket for 93 mph, and that was the day I learned my car's maximum speed lol...
Thanks for the info!

The description of the mechanical (eddy-current) speedometer sounds like what my Datsun 2000 had.  I had to pull the engine-transmission unit on that car, and one of the things I had to disconnect was the speedometer cable.  I didn't realize that it was electro-magnetic at the speedometer end.

But, come to think of it, that would explain why there is a lag in the speedo indication when you change speeds.
Logged
Play Like a Champion Today

Brutus Buckeye

  • Hall of Fame
  • *****
  • Posts: 11253
  • Liked:
Re: Texas and OU to where?!?!
« Reply #579 on: August 12, 2021, 12:13:22 PM »
Relative Size of Alaska, Texas, and the Continental United States |  Download Scientific Diagram
Logged
1919, 20, 21, 28, 29, 31, 34, 35, 36, 37, 42, 44
WWH: 1952, 54, 55, 57, 58, 60, 61, 62, 63, 65, 67, 68, 70, 72, 74, 75
1979, 81, 82, 84, 87, 94, 98
2001, 02, 04, 05, 06, 07, 08, 09, 10, 12, 13, 14, 15, 16, 17, 18, 19

MrNubbz

  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 17201
  • Liked:
Re: Texas and OU to where?!?!
« Reply #580 on: August 12, 2021, 01:26:34 PM »
Like they say in Alaska - Texas - it's cute
Logged
Don't go to bed with any woman crazier than you. - Frank Zappa

utee94

  • Global Moderator
  • Hall of Fame
  • *****
  • Posts: 17794
  • Liked:
Re: Texas and OU to where?!?!
« Reply #581 on: August 12, 2021, 01:36:45 PM »
Quote from: MrNubbz on August 12, 2021, 01:26:34 PM
Like they say in Alaska - Texas - it's cute

Yup, they do say that.  All five of them.  
Logged

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 72141
  • Oracle of Piedmont Park
  • Liked:
Re: Texas and OU to where?!?!
« Reply #582 on: August 12, 2021, 01:45:18 PM »
Speedometer Scandal! (caranddriver.com)

In the good old days, plastic gears in the transmission spun a cable that turned a magnet, which imparted a rotational force to a metal cup attached to the needle. A return spring countered this force. Worn gears, kinked or improperly lubed cables, tired springs, vibrations, and countless other variables could affect these mechanical units.

But today, nearly all speedometers are controlled electronically. Typically, they are driven by either the vehicle's wheel-speed sensors or, more commonly, by a "variable reluctance magnetic sensor" reading the speed of the passing teeth on a gear in the transmission. The sine-wave signal generated is converted to speed by a computer, and a stepper motor moves the needle with digital accuracy.

Logged

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 72141
  • Oracle of Piedmont Park
  • Liked:
Re: Texas and OU to where?!?!
« Reply #583 on: August 12, 2021, 01:46:59 PM »
Sorted by price, luxury cars are the least accurate, and cars costing less than $20,000 are the most accurate. By category, sports cars indicate higher speeds than sedans or trucks. Cars built in Europe exaggerate more than Japanese cars, which in turn fib more than North American ones. And by manufacturer, GM's domestic products are the most accurate, and BMW's are the least accurate by far. One other trend: Only 13 of our 200 test speedos registered below true 70 mph, and only three of those were below 69 mph, while 90 vehicles indicated higher than 71 mph. Are our cars trying to keep us out of traffic court?
Logged

Gigem

  • Starter
  • *****
  • Posts: 2153
  • Liked:
Re: Texas and OU to where?!?!
« Reply #584 on: August 12, 2021, 01:47:37 PM »
Drove from just south of Houston to just North of Witchita Kansas last spring. About 12 or so hours. Stopped just outside of Norman and had dinner with my wife’s aunt. Two parted the trip on the way back, overnighted in Fort Worth. 
Logged

Cincydawg

  • Oracle of Piedmont Park
  • Global Moderator
  • Hall of Fame
  • *****
  • Default Avatar
  • Posts: 72141
  • Oracle of Piedmont Park
  • Liked:
Re: Texas and OU to where?!?!
« Reply #585 on: August 12, 2021, 01:57:39 PM »
My limit today is around 8 hours driving.  I can push that if needed of course, the wife has some issues as a passenger on long drives.  We did DC to ATL last year,  that is a bit of a slog, and we hit construction 2-3 times.  We drive to North Port, FL for baseball, but I find I-75 at least through Georgia to be "OK", boring, but it's six lanes and flat.

Set cruise to 79 and just go.  I also find it best for me to stop every 3 hours or so at least for 15 minutes.  I'm rarely in any time pressure and 15-45 minutes is not big deal to me, and it helps me a lot.
Logged

FearlessF

  • Hall of Fame
  • *****
  • Posts: 37789
  • Liked:
Re: Texas and OU to where?!?!
« Reply #586 on: August 12, 2021, 02:24:02 PM »
Quote from: Cincydawg on August 12, 2021, 01:45:18 PM
Speedometer Scandal! (caranddriver.com)

In the good old days, plastic gears in the transmission spun a cable that turned a magnet, which imparted a rotational force to a metal cup attached to the needle. A return spring countered this force. Worn gears, kinked or improperly lubed cables, tired springs, vibrations, and countless other variables could affect these mechanical units.

But today, nearly all speedometers are controlled electronically. Typically, they are driven by either the vehicle's wheel-speed sensors or, more commonly, by a "variable reluctance magnetic sensor" reading the speed of the passing teeth on a gear in the transmission. The sine-wave signal generated is converted to speed by a computer, and a stepper motor moves the needle with digital accuracy.


and changing to improper diameter tires can really thrown things off
Logged
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

betarhoalphadelta

  • Global Moderator
  • Hall of Fame
  • *****
  • Posts: 12310
  • Liked:
Re: Texas and OU to where?!?!
« Reply #587 on: August 12, 2021, 05:09:15 PM »
Quote from: CWSooner on August 12, 2021, 11:03:50 AM
Thanks for the info!

The description of the mechanical (eddy-current) speedometer sounds like what my Datsun 2000 had.  I had to pull the engine-transmission unit on that car, and one of the things I had to disconnect was the speedometer cable.  I didn't realize that it was electro-magnetic at the speedometer end.

But, come to think of it, that would explain why there is a lag in the speedo indication when you change speeds.
Yeah, and when you think about how they work, it's basically electromagnetic forces balanced against a spring. The electromagnetic forces may not be perfectly proportional to actual speed, and the resistance of the spring is going to be non-linear as well (as much as they want it to be linear). I'll bet that inaccurate readings are probably found both at the low speed and the high speed ends, due to the spring resistance nonlinearity. But we only care about the high end because that's where we get in trouble with the law...

Quote from: FearlessF on August 12, 2021, 02:24:02 PM
and changing to improper diameter tires can really thrown things off
That reminds me, I'll need to get the speedo recalibrated in the Jeep when I throw the 35s on.
Logged
Pages: 1 ... 40 41 [42] 43 44 ... 46   Go Up
« previous next »
 
Support the Site!
Purchase of every item listed here DIRECTLY supports the site.
Smokeys Record Year Hoodie

Custom Mahogany Shadow Box