TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Highway distance driving

Discussion in 'Model S' started by kiloecho78, May 22, 2018.

  1. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    My wife and I are moving to Austin, TX in June and will be caravanning our MS75D behind our Ford Explorer (hauling a moving trailer). I'm hoping someone can give me an account of their experience driving the model S at near the range limit particularly between Wilcox, AZ & El Paso, TX and/or between Van Horn, TX & Ozona, TX. Both of these segments require 223 & 229 miles respectively which is about the max number of miles I've been able to achieve on my daily commute up some steep hills and in traffic. I realize I can stop in Deming, NM and Iraan, TX if necessary, but I would like to avoid as many stops as possible. So if any of you have actually done this PLEASE let me know how difficult it was, your speed over the stretch, etc. Any information would be greatly appreciated.
     
  2. gsteele

    gsteele Member

    Joined:
    Sep 5, 2016
    Messages:
    56
    Location:
    California
    I bet if you draft the trailer, which should be traveling at 55 anyway, you should have no problems. Try it before hand just drafting the truck at 55 and see how much your wh/m improves. This should help you estimate how much you can stretch the range.
     
    • Helpful x 1
  3. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    When you say the trailer should be traveling at 55, are you referring to the California towing vehicle speed limit or is that your opinion? In Texas, unless otherwise posted, they do not attempt to create such a huge difference in the rate of speed of vehicles on the interstates. Granted we were never planning to have the Tesla do 70 Noh during this segment, but 55 is lower than I have estimated. Also being close enough to draft another vehicle will get you ticketed, I know from personal experience.
     
  4. MyJoule

    MyJoule Member

    Joined:
    Apr 20, 2014
    Messages:
    379
    Location:
    Tucson, Az
    #4 MyJoule, May 23, 2018
    Last edited: May 23, 2018
    So for the leg from Wilcox to El Paso, just plan to stop in Deming, it's only 1 mile off the freeway and I think you'll want to stop for a bit after driving for a couple of hours, I need a break anyway . For the leg from Van Horn to Ozona- We detoured through Midland the last time in our S85, I would suggest doing this in the day time though, Lots of Deer sightings on the leg from Midland to Ozona. If you insist on going on I-10 from Van Horn to Ozona, you'll have to slow significantly after making sure you have a full charge at Van Horn. I would bet you can't go over 50MPH(speed limit is 80MPH in this part of I-10) - but try using one of the tools to do the calculations- ( a better route planner or ev trip planner) they are pretty accurate if you input the data ( estimated weight, temperature, winds, tire size etc) The only thing you have going for you is the wind will likely be aiding you since you are traveling west to east. Good luck and make sure you post you success ( or failure) for all of us to see.
     
  5. Need

    Need Active Member

    Joined:
    Nov 22, 2017
    Messages:
    1,624
    Location:
    SoCal
    Is your goal to avoid supercharging stops or have the shortest traveling time? Because in order to have the shortest traveling time, you would not charge to 100% or even 90% in the middle as the last 20% is so slow. So you would not be making a 230 miles stretch.
     
    • Like x 1
  6. jelloslug

    jelloslug Active Member

    Joined:
    Jul 21, 2015
    Messages:
    4,092
    Location:
    Greenville, SC
    On flatish ground going ~65 MPH sustained on interstate conditions, I repeatedly get well over 250 miles of range in my S75D. I usually run less than 250 wh/m of consumption on trips like that.

    [​IMG]
     
    • Like x 2
  7. Don85D

    Don85D Member

    Joined:
    Mar 25, 2016
    Messages:
    275
    Location:
    Markham, Ontario
    Our experience when on a road trip is that weather can change all of your plans. A headwind or rain/snow sucks power faster and a charging plan needs to be in place for a stop along the route. We carry a CHAdeMO adapter to have high speed charging access if required where there may not be Superchargers.

    You need to plan for the worst case even if it never happens. Touring with an EV is much like a sailboat journey where weather determines the plan. Committing to an arrival time is always a mistake.
     
  8. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    I'm trying to avoid adding unnecessary miles and time to my trip so I'm pretty well set on going I-10 if it's possible. What tools are you referring to here?
     
  9. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    I do notice that once I get away from the congestion and out on open highway that my consumption flattens out like you're showing here, this gives me some pretty good insight that what I'm expecting is in fact true. Thanks.
     
  10. Need

    Need Active Member

    Joined:
    Nov 22, 2017
    Messages:
    1,624
    Location:
    SoCal
    He mentioned "( a better route planner or ev trip planner)". I used both too on my road trip and they were very accurate. If you use them you could obtain the minimum travel (including stops) time for your trip with the planned stops and charge to %.

    A Better Routeplanner
    EV Trip Planner
     
    • Like x 1
  11. jelloslug

    jelloslug Active Member

    Joined:
    Jul 21, 2015
    Messages:
    4,092
    Location:
    Greenville, SC
    That particular leg that resulted in the consumption that I posted also included a bathroom stop in the middle. If it would have been straight through, it would have been even better.
     
    • Funny x 1
  12. What_Was_That?

    Joined:
    Aug 26, 2015
    Messages:
    66
    Location:
    Cape Coral, FL
    Drove the I-10 W to E in January with our P85D. Just watched the energy graph and kept our consumption above the line. We had good weather conditions and reduced speeds at times to 55-60 MPH. Going west we did stop in Balmorhea at the trailer park at City Hall for an extra 35 miles. Your car will keep you informed—“Reduce your speed to xxxx to reach your destination”. Of course the car doesn’t account for elevation changes, wind or rain so we always run ev trip planner when concerned about the leg of any trip that does not give us a 25 mile plus 20% cushion. We have a range on our 50K millage 2015 MS of 249 at 100%. Needless to say we charged to that at Van Horn! Arrived at Ozona with 25 mi. after increasing our speed for the last hour. Husband drives slower than I do so this was his leg!
     
    • Like x 1
  13. Rockster

    Rockster Active Member

    Joined:
    Oct 22, 2013
    Messages:
    2,048
    Location:
    McKinney, TX
    I've found that drafting a semi (or in your case a trailer) shows a reduction in drag even with AP set at its maximum distance. There's no need to follow at an unsafe distance in order to see a benefit.
     
    • Helpful x 1
  14. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    Oh! I thought those were just generic terms, I see now. Thank you.
     
  15. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    Thank you for the reply. All of my calculations and practice are showing me that this is possible but actually doing it is sometimes another story. My wife will be driving the Tesla for all but the two segments I've mentioned here. For these I'll take over since I've got the patience and practice (plus as an engineer I can do calculations on the fly ;)).
     
  16. ucmndd

    ucmndd Active Member

    Joined:
    Mar 10, 2016
    Messages:
    1,358
    Location:
    California
    If the goal is saving time I think you might actually find that stopping more often for shorter charges might be as quick or quicker than supercharging to 100% (sloooow) and then potentially having to limit your speed to arrive at the next stop.
     
    • Like x 1
  17. TexLaw

    TexLaw Member

    Joined:
    Jan 29, 2017
    Messages:
    444
    Location:
    Bellaire, TX
    This may be more than you ever want or need to know, but there's a lot of good information in this thread:

    Far West Texas Charging
     
    • Like x 1
  18. kiloecho78

    kiloecho78 Member

    Joined:
    Oct 6, 2017
    Messages:
    12
    Location:
    Orange County, CA
    Mythbusters did a segment on this a while back and it they were able to show an 11% increase in efficiency when drafting about 100 ft behind the 18-wheeler (which at 65 mph is the minimum safe following distance). So you're right there would be a benefit in this, however a boxy 18-wheeler displaces a LOT more wind than my Explorer towing a Kendon trailer with two sport bikes will. If I see that battery start to look like it's not going to make it, you can bet I'm gonna get real cozy with the slowest moving 18-wheeler or RV that I can find.
     
  19. jelloslug

    jelloslug Active Member

    Joined:
    Jul 21, 2015
    Messages:
    4,092
    Location:
    Greenville, SC
    Yep, I have seen that even with the follow distance set to 7.
     
  20. gsteele

    gsteele Member

    Joined:
    Sep 5, 2016
    Messages:
    56
    Location:
    California
    If you own the trailer and know that it’s sound at higher speeds do what you want. The rental trailers that I’ve seen recently are probably not safe at 55. Also remember stopping distances get longer at higher speed. I’ve had enough idiots pull in front of me and then slow down while I was towing my boat. The tend to realize they messed up when they hear squealing tires.
    You don’t have to be right behind the trailer to get some benefit from drafting. Having the following distance set to 3 you’ll still see improved wh/m versus nobody in front of you.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC