Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-30-2017, 02:47 PM   #21 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 14,881
Thanks: 3,740
Thanked 4,959 Times in 3,945 Posts
Quote:
Originally Posted by Redpoint5
Quote:
Originally Posted by Old Tele man
Hubs and axle bearings will STILL need to be cleaned and re-greased periodically.
They'll have to change the "book hours" on that procedure to 20hrs to make up for the lost hours on everything else.
All that 'hand labor' will hasten the arrival of magnetic bearings.

__________________
.
The only reason that the chicken is not gone extinct is because they're so delicious that we breed them at a very high rate to ensure that we don't run out of ó Chris Ray Gun
_________________

Don't Californicate Oregon

_________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-01-2017, 12:40 PM   #22 (permalink)
Master EcoModder
 
NeilBlanchard's Avatar
 
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,814

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
TEAM VW AUDI Group
90 day: 155.81 mpg (US)
Thanks: 3,279
Thanked 2,834 Times in 1,781 Posts
Quote:
Originally Posted by rmay635703 View Post
You mean 200kwhr

Or 0.2MWh

About twice as much capacity as a p100 but at 4x the price
Ooops - 200kWh.
__________________
Sincerely, Neil

http://neilblanchard.blogspot.com/
  Reply With Quote
Old 12-08-2017, 12:20 AM   #23 (permalink)
Not Doug
 
Xist's Avatar
 
Join Date: Jun 2012
Location: Show Low, AZ
Posts: 8,695

Chorizo - '00 Honda Civic HX, baby! :D
90 day: 35.35 mpg (US)

Mid-Life Crisis Fighter - '99 Honda Accord LX
90 day: 35.48 mpg (US)

Mom's grandmamobile - '06 Toyota Camry SE
Thanks: 5,869
Thanked 1,674 Times in 1,265 Posts
Has anyone mentioned the 5-second 0 - 60? I am not sure how much that matters to anyone here, but other people seem very excited about that.

According to https://itstillruns.com/car-vs-tract...r-6579130.html, a semi without trailer can do 0 - 60 in 10 seconds, it takes 20 seconds with an empty trailer, and 35 seconds if fully-loaded.

Perhaps the Tesla could hit 60 with an empty trailer in 10 seconds and 17.5 with a full load, but would it?

People commented in this discussion that fast acceleration is irrelevant to trucking often prevented by the computer.

Still, wouldn't it be nice to be behind a semi that accelerates decently?
  Reply With Quote
Old 12-08-2017, 05:22 AM   #24 (permalink)
Ol' Skooler
 
jcp123's Avatar
 
Join Date: Jul 2009
Location: Tyler, TX
Posts: 1,136

Beater Echo - '00 Toyota Echo
90 day: 42.67 mpg (US)

Hondizzle - '97 Honda Civic DX
Team Honda
90 day: 45.04 mpg (US)
Thanks: 60
Thanked 187 Times in 160 Posts
Quote:
Originally Posted by Xist View Post
Has anyone mentioned the 5-second 0 - 60? I am not sure how much that matters to anyone here, but other people seem very excited about that.

According to https://itstillruns.com/car-vs-tract...r-6579130.html, a semi without trailer can do 0 - 60 in 10 seconds, it takes 20 seconds with an empty trailer, and 35 seconds if fully-loaded.

Perhaps the Tesla could hit 60 with an empty trailer in 10 seconds and 17.5 with a full load, but would it?

People commented in this discussion that fast acceleration is irrelevant to trucking often prevented by the computer.

Still, wouldn't it be nice to be behind a semi that accelerates decently?
As someone who drives a truck, actual acceleration is nearly meaningless to me. At best something of a side bonus. Much more valuable is how well it can climb with a load. That right there puts money in a driver's pocket when terrain is involved.
__________________



'97 Honda Civic DX Coupe 5MT
'00 Echo - dead 2/17
'14 Chrysler Town + Country - the better half's car
'67 Mustang Convertible - gone 1/17
  Reply With Quote
The Following 3 Users Say Thank You to jcp123 For This Useful Post:
BamZipPow (12-08-2017), slowmover (12-08-2017), Xist (12-08-2017)
Old 12-08-2017, 06:48 AM   #25 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,599

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 51.77 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 28.13 mpg (US)
Thanks: 1,429
Thanked 1,949 Times in 1,248 Posts
It is not just the acceleration power that is important here. The Tesla truck does not need to change gear, ever. That will save a lot of time in town and in undulating terrain.

I see trucks, stopped at a traffic light, miss the next green light all the time.
The 'green wave' is tuned for cars, not for slowly accelerating trucks.
A fast accelerating Tesla truck may save one minute per traffic junction...
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.16 Gmeter or 0.1 Mmile.



Most people are in the longest queue.
  Reply With Quote
The Following User Says Thank You to RedDevil For This Useful Post:
BamZipPow (12-08-2017)
Old 12-08-2017, 08:30 AM   #26 (permalink)
Banned
 
Join Date: Oct 2009
Location: Fort Worth, Texas
Posts: 2,442

2004 CTD - '04 DODGE RAM 2500 SLT
Team Cummins
90 day: 19.36 mpg (US)
Thanks: 1,422
Thanked 731 Times in 553 Posts
Itís not ever going to be an efficiency to accelerate a big truck stoplight to stoplight to aid traffic flow.

As above, itís about a higher average mph. The time from taking on the load until delivery. Signature to signature.

Cutting the hills down to size would be the greatest aid to average mph past lower traffic volume. If greater acceleration is available, then itís use on the highway is where it matters.

Operating a big truck is about being smooth. Missing ďthe green light waveĒ is consistent with this. Itís too much mass to contend with. Empty, Iíd think Iíd want a limited rate of acceleration control applied. Throttled back. Thereís no good reason to do otherwise, as wear on tires, brakes etc isnít justified, nor is hotdog driving.

Same for other vehicles. 0-60 in 12-seconds has always been fast enough for personal transportation.

Expect that sort of thing to happen. A ďfuel efficiency standardĒ for electric vehicles.

.
  Reply With Quote
The Following 2 Users Say Thank You to slowmover For This Useful Post:
BamZipPow (12-08-2017), Xist (12-08-2017)
Old 12-08-2017, 08:32 AM   #27 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,164

Silver - '10 Chevy Cobalt XFE
Thanks: 317
Thanked 603 Times in 445 Posts
As someone in the heavy truck industry we see fatigue failures in various components on older trucks all the time.

More acceleration means either more weight or more structural failures more often.

Assuming of coarse the truck isnít built of some sort of super metal or composite.
  Reply With Quote
The Following 2 Users Say Thank You to rmay635703 For This Useful Post:
BamZipPow (12-08-2017), Xist (12-08-2017)
Old 12-08-2017, 01:55 PM   #28 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 14,881
Thanks: 3,740
Thanked 4,959 Times in 3,945 Posts
Quote:
Assuming of coarse the truck isn’t built of some sort of super metal or composite.
Foamed metal

The parts will look beefier, but weigh less and be stronger.
__________________
.
The only reason that the chicken is not gone extinct is because they're so delicious that we breed them at a very high rate to ensure that we don't run out of ó Chris Ray Gun
_________________

Don't Californicate Oregon

_________________
  Reply With Quote
Old 12-08-2017, 04:12 PM   #29 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,599

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 51.77 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 28.13 mpg (US)
Thanks: 1,429
Thanked 1,949 Times in 1,248 Posts
I think fatigue failures are mainly due to lots of changes in load rather than the load in itself. As the Tesla truck won't change gear, it would see less frequent changes in load.

Four motors driving each rear wheel directly and independently will further lessen the strain on the frame compared to one big frame mounted engine and gearbox.
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.16 Gmeter or 0.1 Mmile.



Most people are in the longest queue.

Last edited by RedDevil; 12-08-2017 at 04:18 PM..
  Reply With Quote
Old 12-08-2017, 05:57 PM   #30 (permalink)
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,164

Silver - '10 Chevy Cobalt XFE
Thanks: 317
Thanked 603 Times in 445 Posts
Quote:
Originally Posted by RedDevil View Post
I think fatigue failures are mainly due to lots of changes in load rather than the load in itself. As the Tesla truck won't change gear, it would see less frequent changes in load.

Four motors driving each rear wheel directly and independently will further lessen the strain on the frame compared to one big frame mounted engine and gearbox.
A maximum braking event brings many big rigs frame and xmbr s up into the yield zone and that is ďas designed ď

These trucks ladder frames arenít made to last much more than 10 years in most cases.

Re rails and gliders are common in the industry for this reason

So yes heavy, steady braking or acceleration will cause accelerated wear unless itís in the design case.

  Reply With Quote
The Following User Says Thank You to rmay635703 For This Useful Post:
freebeard (12-08-2017)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com