Thứ Hai, 23 tháng 1, 2017

400 Mile Range Prize part 1

  • Jun 13, 2012
    vfx
    Jim writes in cartalk: http://www.cartalk.com/content/tesla-model-s-preparing-launch

    http://www.teslamotors.com/blog/model-s-efficiency-and-range
    Is anyone here planning to go for this? I think Greg in SD is the earliest delivery in TMC.

    Of course we would need rules.
    �
  • Jun 13, 2012
    NigelM
    Hmmmm, Florida is nice and flat....but there's 182 cars ahead of me.
    �
  • Jun 13, 2012
    gg_got_a_tesla
    Elon's tweets regarding this in early May when he and JB posted that Model S efficiency and range blog:

    Twitter

    10 May Elon Musk Elon Musk [email�protected]

    Meant to say: prizes for first 10 who do 400 miles in Tesla w/o recharging, not nonstop, which would require diapers :)


    9 May Elon Musk Elon Musk [email�protected]

    Model S exceeds 300 mile range target! Prize for the 1st person to do LA-SF nonstop (400 miles) Model S Efficiency and Range | Blog | Tesla Motors
    �
  • Jun 13, 2012
    vfx
    People coming from LA to do a factory pickup. Imagine the discipline it would take to do the 400 mile hypermiling your first big drive.


    If the prize was another Tesla...
    �
  • Jun 13, 2012
    dsm363
    I wonder what roads you could take that would safely allow you to travel 40 mph or maybe less and still land someplace where you could charge?
    �
  • Jun 13, 2012
    gg_got_a_tesla
    Hwy 1! But, the hills might be a range-killer though. The rightmost lane on US-101 may not be that bad as most of the heavy and fast traffic will be on I-5.
    �
  • Jun 13, 2012
    onlinespending
    You could easily cheat and spin the wheels while the car is held stationary. Either by suspending the car or driving on a treadmill like apparatus
    �
  • Jun 13, 2012
    gg_got_a_tesla
    Tesla will catch you out with the full car logs coupled with GPS data! Or, they'd expect you to start from Palo Alto HQ and end up in Hawthorne or the other way around.
    �
  • Jun 13, 2012
    onlinespending
    Agreed. They should use the GPS data to see that you've actually driven a reasonable route. Which means driving around a track or around your block wouldn't count either.
    �
  • Jun 13, 2012
    twisti
    I was driving on Hwy 1 north with our Volt on Saturday and the electric range was much less than I expected. The hills are really a problem there.
    �
  • Jun 13, 2012
    strider
    Take 101 for the Rabobank chargers just in case and do it at night so you can drive slow enough. My house to the Tesla LA store is 408 miles.... So you're talking what... 10 hours w/ a few stops?
    �
  • Jun 14, 2012
    dsm363
    That would be a big trip. I guess it would be safest to have someone follow you behind with their hazard blinkers on and have a tow truck on standby.
    �
  • Jun 14, 2012
    Vger
    Having the wind behind you would be huge. Remember 60 mph with a 20 mph tail wind is the same ad 40 mph in still air! Also high altitude for low air density. I think traveling east from Denver or Calgary would be a good run (not that I live there). Charging at the end could be problematic, but one could scope out an RV park.
    �
  • Jun 14, 2012
    NigelM
    Sarasota to Dania Beach and back, just over 400 miles, elevation less than 65ft all the way, and nobody in Florida will see anything unusual in a car doing 40mph on the I-75 (although I might have to disguise myself as an old lady or put Canadian plates on the car!).:biggrin:
    �
  • Jun 14, 2012
    ElSupreme
    This is so sad but true. Just make sure you are in the left lane.
    �
  • Jun 14, 2012
    vfx
    And if you had two trucks in front and back you could draft the S and go a bit faster.

    Option 2 has all ten new S owners drafting to LA.
    �
  • Jun 14, 2012
    Citizen-T
    This would be awesome. Model S owners should get together and form a train, taking turns with who is in front.

    That'll turn some heads.
    �
  • Jun 14, 2012
    AnOutsider
    Who wins the prize? The guy in front when he hits 400?
    �
  • Jun 14, 2012
    Robert.Boston
    10 owners can win, so just make sure the peleton is no larger than 10!

    I think the best place to set a record is starting in Byers, Colorado and heading east on US Highway 36 towards St. Joseph. That's 520 miles of straight, flat road, descending from 5,200 ft to about 1,000 ft. Choose a day with strong winds, drive conservatively (possibly with police escort to ensure you never need to stop), and you might just be able to get all the way to St. Joe's.
    �
  • Jun 14, 2012
    Lloyd
    My thought too, denver to Salina KS
    �
  • Jun 14, 2012
    smoothoperator
    car carrier with dyno on board :biggrin:
    �
  • Jun 14, 2012
    daniel
    I gather that the prize is yet to be determined. Kind of makes a difference whether the prize is $10,000 or a cap with "400 miles" written on it. I would not drive for ten hours at 40 mph in order to win a cap. Actually, I would not drive 400 miles just in the hopes of maybe, but probably not, winning any prize at all. But that's just me. And anyway, you'll have to be one of the very first in line even to have a chance. Someone will probably do it on June 22 or 23, with or without a prize. For at least the next year there'll be an informal contest to see who can set the new distance record.
    �
  • Jun 14, 2012
    brianman
    If Tesla offered it to all (not just the first), I'd do it for a plaque or crystal type memento.
    �
  • Jun 14, 2012
    AnOutsider
    +1, just to say I did :) If they get superchargers on I-95 I might make my roadtrip this fall in the S
    �
  • Jun 14, 2012
    vfx
    To keep the car clean inside? You'd still have to drive the truck at 40 or the GPS track would give you away.

    Remove the GPS and give it to a cyclist.
    �
  • Jun 14, 2012
    daniel
    If the prize has significant monetary value, someone will probably try to cheat. I like the idea of a nice-looking but cheap plaque to everyone who manages to drive 400 miles without charging. Though it would encourage abusing the battery by unnecessarily charging to full and driving to empty.

    Actually, between 15 and 20 mph even the Roadster will do just over 400 miles. So doing 400 in the Model S will be a simple matter of driving very slowly. Maybe 30 or 35 mph with the larger battery pack in the S. That really wouldn't mean anything at all, other than your willingness to spend 12 or 15 hours driving very slowly. Maybe the "prize" should just be an honorable mention on the Tesla web site for the first person to turn in vehicle logs demonstrating a 400-mile run.
    �
  • Jun 14, 2012
    NigelM
    ^ Isn't "abusing" somewhat OTT in that context. EV's are designed to be driven and recharged after all.....
    �
  • Jun 15, 2012
    malcolm
    Prize could be a free battery upgrade. The 500 mile pack that Elon says could be done now but which would be too pricey?
    �
  • Jun 15, 2012
    daniel
    Yes, but they warn aganst charging to full and discharging to empty on a regular basis. I charged to full once and the car warned me and asked if I was sure I wanted to. Say it takes you ten tries. Ten times charging to full and discharging to empty. Just in hopes that you might win a prize.

    They're not going to build a one-of-a-kind 500-mile pack just to offer as a prize for driving 400 miles. It would probably cost many millions to design and test it.

    Anyway, I've changed my viewpoint: All you need to do to drive 400 miles is drive 20 or 25 mph for 16 to 20 hours. So the first customer willing to do that will win the prize. Won't prove anything. Maybe they should make it a race instead. Whoever can drive 400 miles in the least amount of time. Make it a traveling trophy. You get to keep it until your record is broken.
    �
  • Jun 15, 2012
    NigelM
    ^ It would only take one attempt. Ergo, no battery abuse.
    �
  • Jun 15, 2012
    AnOutsider
    One that displays on your screen at Model S boot-up. You'll know you've lost when it's no longer there one morning. Cruel, but gamification and glory are some great motivators.
    �
  • Jun 15, 2012
    Sig698
  • Jun 15, 2012
    vfx
    Great idea.
    There were many Prius owners in the early days who started this by playing their car like a video game. Then Leaf owners, Volt, etc all would compete for best miles per charge. Taking that to the Model S screen like an arcade video game that people see on their car screen is a super cool way to connect drivers in a unique way.

    images?q=tbn:ANd9GcTKKj8OY0O1CFRFH7QoniCaK3aQSH3B03qZoFA0gHxVPqhrx3qC.jpg [?IMG]
    Considering Elon's first business venture was a video game this seems appropriate.
    �
  • Jun 15, 2012
    brianman
    That centipede high score list is a bit ... soft.
    �
  • Jun 15, 2012
    jerry33
    One of the great things about the Prius (and now other modern cars) is that you get more games than just How fast can I go from A to B. After playing that game for many years, I've found it to be kind of boring and stressful (there is always someone slower, a red light, or a policeman). It's much more relaxing and interesting to get the most mpg (or m/Wh in the Tesla's case) out of your car.
    �
  • Jun 15, 2012
    brianman
    You'll find that if you're the fastest car on the road, everyone else tends to be (relatively) slower and thus... in the way. :)
    �
  • Jun 15, 2012
    jerry33
    That is correct--although I've never found a speed--not even in rural Saskatchewan--where someone isn't passing you, only the number of passers per mile gets lower.
    �
  • Jun 18, 2012
    malcolm
    I was thinking along the lines of the latest cell chemistry in the existing 18650 cells in the current S skateboard. Would only need updated firmware to alter the charge/discharge protocols. They must be doing this sort of R&D anyway.
    �
  • Jun 18, 2012
    AnOutsider
  • Aug 25, 2012
    Vger
    Just occurred to me that there are enough Model S's in the wild that someone might have tried this by now. Anybody heard anything?
    �
  • Aug 26, 2012
    strider
    No but I doubt Founders and the earliest SSL's are crazy enough to want to try and drive from SF to LA at 45mph. By which I mean, this a young person's challenge :p
    �
  • Aug 27, 2012
    Trnsl8r
    Even so... there would have to be more than just fame and glory at the end of that rainbow...
    �
  • Aug 27, 2012
    brianman
  • Sep 5, 2012
    dadaleus
    Hmmm... was considering trying it this Sunday after I pick up my car Saturday afternoon in Fremont. There's a lot that wouldn't be ideal though:
    - I'll have my whole family. I figure a total passenger and cargo load of about 470 lbs
    - Kids are going to get cranky after that much time in a car, even if it's a brand new S
    - I'll really be wanting to open it up in that thing. Maybe I'll drive it like mad for a bit then top it off before I start the 400 miles
    - Would probably take 101. So I'd be hoping no one slams into the slow lane. I have a Roadster but not sure--do people think it would be better to go a constant speed or to take surface streets with starts and stops?
    - I'd need to spend the night. Do people think I'll lose many miles by letting it sit for 9 hours? I'd like to drive about 4-5 hours on Saturday, sleep 9 hours, then drive the other 6-9 hours on Sunday. Would rather go a bit slower to make up the loss than have to spend the night near Fremont and do the whole 400 miles in one go.

    I'm thinking this is probably a tall order. I could always enjoy the car for a couple weeks and then take it out on a weekend just to try for this under more ideal conditions. But I'm guessing someone will beat me to the punch.
    �
  • Sep 5, 2012
    RobotGrease
    Not necessarily 400 miles, but this is a good sign. In fact, I think its the first "public" indication of range beyond the 265 rating. (of course motortrend achieved less range, but they weren't exactly trying...)

    http://www.teslamotorsclub.com/showthread.php/10035-Edmonds-Beats-EPA-s-265mile-Range!
    �
  • Sep 5, 2012
    J in MN
    Constant speed is without question the only way to get it done.
    �
  • Sep 5, 2012
    gg_got_a_tesla
    Or, maybe, no freeway at all and add up your total tally over several days of timid driving all on a single (range) charge: Edmonds Beats EPA's 265mile Range!!

    Congrats, dadaleus! Looking forward to pics and your feedback on the Model S.
    �
  • Sep 5, 2012
    vfx
    Talked with an S owner who picked up in LA. Then drove to SF and back. Charged at Rabo banks with the J adaptor.
    �
  • Sep 5, 2012
    Robert.Boston
    @dadaleus: my recommendation would be to drive to Indian Springs, stay overnight at one of the many hotels with EV charging, and then drive southeast from there and do laps around the Salton Sea. Yeah, it's not sexy, but its flat and roads are lightly traveled enough that you can dawdle along at 40 mph without being a complete pain. It's 18 miles from the Renaissance in Indian Springs to Mecca, at the top of the Salton Sea. Three laps around, then back to Indian Springs, is 402 miles by my reckoning.
    �
  • Sep 5, 2012
    Arnold Panz
    Dadaleus,

    First of all, congrats! Only a couple of days to go until you get your S.

    As for going for the 400 miles, I'd offer two thoughts. First, you'll make it a LOT easier if you are by yourself, or at most with one other person. 400+ lbs of extra weight is definitely going to make your task more difficult. Second, I think the biggest contributing factor to success at this, besides the obvious like hills and speed, is the weather. If you can go at a time when you don't need heating or A/C (but the windows rolled up) for what will end up being a pretty long trip, that's going to be the best way to maximize your mileage.
    �
  • Sep 5, 2012
    mnx
    Good luck dadaleus!

    I was really hoping to give this a shot at some point, but I haven't even had the chance to configure my car yet... :)
    �
  • Sep 5, 2012
    dadaleus
    Yea, re weather I was thinking coming down PCH/101 would be best because it would be cooler than being out in the desert. I get the advantage of being out east for flat and no traffic, but would be painful to not use A/C. I guess I'd just go in some shorts and a t-shirt and keep the windows down. I think I'll just not try this weekend, and if I feel like making a dedicated attempt in a couple weeks, and no one else has claimed this, I could try it then. I'm just too lazy to give this the try it may really need. :) One thing to go slow, another to do all the other things necessary.
    �
  • Sep 5, 2012
    Robert.Boston
    Drive at night out east? It's in the 70s then.
    �
  • Sep 5, 2012
    strider
    Further up thread I think the way would be to drive at night on 101. Other cars will be going slower than they will be on I-5 so it'll be safer and the Rabobank stations are there in case you won't make it.
    �
  • Sep 14, 2012
    neroden
    OK, I'm now speculating on how to do this with the "20 mph, 20 hour" procedure. Perhaps drive the length of the UK entirely on back roads? You should be able to minimize stops because of the UK's preference for roundabouts over stop signs and traffic lights.
    �
  • Sep 14, 2012
    Robert.Boston
    Find a racetrack that has a gap in its schedule.
    �
  • Sep 14, 2012
    NigelM
    You still have to give way (yield) to traffic already on the roundabout, which on many roads will mean coming to a complete stop.
    �
  • Sep 14, 2012
    neroden
    I'd think the tedium would cause a crash. :)
    �
  • Sep 14, 2012
    ElSupreme
    I am sure there are a lot of these in rural america. This one we used as a bicycle race lap when I was at college. This has some elevation gain that you would probably look to avoid. But only 1 stop sign (right turn), and one other right turn per almost 8 mile lap. And it is way rural, and a pseudo dead end so, unless you go during the Georgia Tech Bicycle race, you won't have to worry about stopping but once per 8 miles.

    It would be boring as hell though. We capped that race at 56 miles because the laps were pretty short. And we also would have a time trial on it earlier in the day.

    http://binged.it/SLR3tc
    �
  • Sep 14, 2012
    brianman
    I thought there was something about the trip having to end up @ Fremont or something -- I thought it was a prescribed target pair of start and stop cities. Perhaps I'm misremembering it.

    Does it have to actually be a GPS-proven distance, or does a dyno run of 400 miles count? ;)
    �
  • Sep 14, 2012
    dsm363
    That's what I remember too. Something about starting in LA but can't find it.
    �
  • Sep 14, 2012
    ElSupreme
    He tweeted it. Here you go!

    Elon 400 mile prize.png
    �
  • Sep 14, 2012
    dsm363
    Thanks. Thought I remembered seeing it somewhere and thinking "well, I can't even attempt that trip". Hope someone does and gets whatever prize there is.
    �
  • Sep 14, 2012
    NigelM
    California-centric.....again......:rolleyes:
    �
  • Sep 14, 2012
    mlascano
    I'm sure they'll give the "prize" to anyone completing 400 miles on a single charge even if it's not the LA-SF trip Elon mentioned on his tweet.
    This would be big publicity for TM no matter where it's done.
    �
  • Sep 14, 2012
    Robert.Boston
    Baltimore to Boston (400 miles on I-95). That would be brutal -- there's no easy route that you could drive slowly and with few stops.
    �
  • Sep 14, 2012
    vfx
    Yeah,,, If it happened in Florida, CA, Texas, Montana and 6 places inbetween it would add much more local credibility to the car's capabilities.
    �
  • Sep 14, 2012
    dsm363
    I'm trying to figure out where one could safely drive that slow. Maybe state roads? You'd probably have to drive 35 mph.
    �
  • Sep 14, 2012
    strider
    Based on the Model S range graph, yes, 35mph would do it.

    Doing it on a track kind of takes the fun out of it... Should be on public roads on a trip to actually get somewhere vs driving in circles.
    �
  • Sep 14, 2012
    NigelM
    +1. There's needs to be some thrill in it.....



    (P.S. Substitute gas for battery....)
    �
  • Sep 14, 2012
    Robert.Boston
    On my theoretical "drive the car home from the factory" trip, I had planned to drive west from Denver to Kansas City on US-36, which is straight, downhill, downwind, and lightly traveled. For safety sakes, it would be best for the Model S to be trailed by a vehicle with yellow flashing lights (like those used when moving over-width loads), but I'm sure that you could do 400 miles at 35mph on this route. From the Denver East / Strasburg KOA to Washington, KS is exactly 400 miles.
    �
  • Sep 15, 2012
    JRod0802
  • Nov 10, 2012
    jat
    If I were going to try it (which I don't think it is worth 10+ hours of my time), I would drive circles around an abandoned shopping mall at ~30mph - that should do it.
    �
  • Nov 10, 2012
    Johan
    That would take you 13h20min at 30 mph :)

    I think whole point is to drive from A to B with the two being 400 miles apart...
    �
  • Nov 10, 2012
    jerry33
    As I recall, Elon specifically excluded that method.
    �
  • Nov 13, 2012
    NigelM
    Driving around town this morning I noticed that my projected range was >20 miles higher than rated range and that as I drove neither number seemed to be falling in line with my mileage. I tried beng "extra careful" with my driving habits for 5 or 6 miles to see how low I could get the average power consumption while still keeping up with traffic. With A/C and music on I got the average down to 186Wh/mile which seems to indicate that 400 is achievable.

    photo1.JPG
    photo.JPG
    �
  • Nov 13, 2012
    stevezzzz
    Over on another thread devoted to this topic I proposed a route from Alma, CO, to Hays, KS. My entry is near the bottom of this first page.

    Best Route for 400 mile Challenge

    Based on recent experience with driving the S on mountain roads in Colorado, I now believe that it's much more important to pick a route that includes an absolute minimum of climbing (i.e., as flat as possible) than to try a route that is significantly downhill overall but includes climbs as well as descents. You just don't get back enough of the energy expended in climbs during the descents. I drove a 48 mile route that descended 4000' overall, but I still expended about 143 Wh/mile. Granted, I did it at higher speeds than a hypermiler would, but the bulk of it was done between 30 mph and 45 mph.

    Hack-charging on a generator - Page 8
    �
  • Nov 14, 2012
    GSP
    Try a circular , flat, city route. Cross county city to city is not the way to get 400 mi.

    GSP
    �
  • Nov 14, 2012
    Arnold Panz
    Nigel, I've played that game also of trying to my average under 300 or under 200 -- the easiest is when I'm with traveling with the wind and driving behind a truck going slow (around 50mph). If I had two days to spare (because I'd need to go 400 miles in one direction) I'm pretty confident I could do the 400 miles on a charge, but unless the prize is another S I really can't spare the time!
    �
  • Nov 14, 2012
    mnx
    I really thought someone would have done it already. Perhaps I'll get a chance to try it after all.
    �
  • Nov 14, 2012
    strider
    Elon's challenge was that it had to be from point A to point B. Driving around in circles wouldn't count.
    �
  • Nov 14, 2012
    stevezzzz
    And that, in a nutshell, is why the challenge hasn't been met already. Finding a 400 mile route that's got the required profile isn't easy. Is there a web app out there that can profile a driving route for elevation changes and total climb/descent numbers, taking into account topography as well as the elevation difference between two points?

    Then there's the three or four or five days you'd have to devote to a successful attempt: a day to get in position and recharge to Range mode; a full day or so for the attempt, with some rest stops; recharge; return to base. It's not a trivial undertaking.
    �
  • Nov 14, 2012
    meloccom
    Well if no one has done it by next year, it would be possible between Wagga Wagga NSW Australia and Renmark South Australia. In fact the 400 mile mark would come up just about the Victoria \ South Australian border. I would get a tow truck to follow me from about Mildura.
    This is called the Hay plain and is the flattest straightest length of road in the country.
    Wagga Wagga NSW to Renmark SA - Google Maps
    So this could be my excuse to upgrade to the 85Kwh battery.:wink:
    �
  • Nov 14, 2012
    JRP3
    Well how far apart do A and B have to be?
    �
  • Nov 14, 2012
    mlascano
  • Nov 14, 2012
    vfx
    Tesla_501k_distance_610x510.jpg http://news.cnet.com/8301-11128_3-10384984-54.html
    �
  • Nov 14, 2012
    richkae
    Coming up with the equations to prove it is beyond me, but I bet there is substantial energy used to turn the car.
    I think you want the straightest flattest 400 miles you can find.
    �
  • Nov 14, 2012
    ggr
    ... boringest ...

    I speak from experience. But I thought the Nullarbor won the prize.
    �
  • Nov 14, 2012
    gg_got_a_tesla
    Wondering if the driver needs to be a 100 lb jockey to achieve this?!
    �
  • Nov 14, 2012
    Zextraterrestrial
    I hope not. I want to try a slooow trip to Humboldt and I'm not a Jockey ;>
    �
  • Nov 14, 2012
    rolosrevenge
    I honestly would do Thanksgiving Point, UT to Caldwell ID, It's nearly all down hill and 400 miles. I once drove it with my 1990 Ford Ranger pulling a UHaul trailer at 55 mph. I made Provo to Boise on a single tank of gas with about 31 mpg (I was moving from Provo to Seattle). The best highway I'd ever done on flat ground at 55 mph without pulling a trailer was about 26 mpg. I was really amazed. After that though, all the rest of the way I did about 20 mpg because of going up and down mountains. But that stretch is 400 miles, between some decent sized cities and nearly all downhill. That'd be where I'd try.
    �
  • Nov 15, 2012
    Norbert
    Well, I suppose you have to wait until the prizes are announced. ;)
    �
  • Nov 15, 2012
    meloccom
    Okay probably should have said one of the flattest and straightest. The Nullarbor starts soon after Adelaide a bit further on the same road, but we only need 400 miles of flat strait road.
    �
  • Nov 15, 2012
    strider
    There aren't any real "rules" that I know of but the statement was made in the context of SF to LA. My assumption is that Tesla would use it as a marketing thing and would like it to be "real world-ish" as in a trip from one place to another. I used quotes because driving 400 miles at 30mph isn't very real world but you get my point.
    �
  • Nov 15, 2012
    Robert.Boston
    Trouble with that route is that it's all on interstate highways, so you'd need to drive at least 45 mph. That's probably too fast to make 400 miles.
    �
  • Nov 15, 2012
    jerry33
    Most of the energy used on turning has to do with the toe-out-on-turns alignment angle. TOOT is required because when the vehicle is turning, the two front wheels' turning circles have different radii. Now if cars were made the way wagons were made, there wouldn't be a problem because the front axle would rotate creating a perfect turning radius at any point. However, doing it that way uses a lot of space and lifts the body up really high. Steering geometry that changes with the angle of the wheels in respect to the centerline of the car as the vehicle turns would work too--but it's mechanically very complex and failure prone to do so. So what we have is a system of linkages that minimize the scrubbing when turning while being mechanically simple and robust.

    If the wheels turned parallel to each other, then the amount of scrubbing would increase the further the steering wheel was turned. TOOT provides an additional point of zero scrub.

    With TOOT there are two points of minimum scrubbing: Straight ahead and at some point during the turn. Every other position scrubs, just not as much. So presumably, if you knew what the angle was you could drive on a track with exactly that radius and have virtually no additional resistance. (You can also fake it out by using a banked track--at the right superelevation and speed you never need to turn the steering wheel.)

    The correct angle of the TOOT varies with the wheelbase of the car. It's adjusted by different length steering arms, so the more adventurous could machine some steering arms of various lengths and experiment. Should a manufacturer get this wrong--and some have--tire life in the city can be very short.
    �
  • Nov 15, 2012
    Babylonfive
    Note also that if you drive slow enough to get 400, it'll take a lot longer than you think.

    400mi @ 20mi/hr = 20 hours -- ouch
    �
  • Nov 15, 2012
    Robert.Boston
    There's no requirement to do the drive all in one day. With the reported high level of "vampire load," though, you'd probably can't let the car sit overnight. Even still, I don't think you'll need to do this drive @20mph; should be achievable @35mph, or 11.4 hours.
    �
  • Nov 16, 2012
    Cottonwood
    A good discussion of these factors is at Roadster Efficiency and Range. This was written for the Roadster at the end of 2008, but all of the concepts apply to the Model S. The S has more parasitic loads than the R and it has better aerodynamics. These two differences will tend to push the curve to the right. Other factors that will probably make the 400 mile goal a reality are a downhill run and a tailwind. Both of these will also push the curve to the right. Finally the curve has a fairly broad minimum. Put all of this together, and the 400 goal is probably quite doable at a 45 mph speed which would let you legally drive on an interstate. Driving on the interstate will also help because you can avoid stop and go losses. 400miles @ 45mph makes for a very pleasant 9 hour day of driving. :biggrin:

    A tailwind is probably one of the biggest factors for the success of this challenge. I once flew a hot air balloon, drifting at wind speed only, from Colorado to Kansas, covering 160 miles in 3 hours. I did it by climbing to 17,500 feet where the jet stream blew me at 70 mph to Kansas. :wink: Whoever does this, I recommend watching the weather. For my long distance balloon flight, I watched the weather for several weeks before my flight, waiting for the best forecast winds.
    �
  • Nov 16, 2012
    Robert.Boston
    So it was you who took Dorothy home!!
    [?IMG]
    �
  • Nov 16, 2012
    Babylonfive
    If it was up to me, and I wanted the contest to be 'fair', then I'd make it run from place X to place Y, then back to place X. This would remove any benefit of a downhill-only trip.
    Just my two cents.
    �
  • Nov 17, 2012
    Cottonwood
    So that means that Colorado is Oz. I agree with that! :biggrin:
    �
  • Nov 23, 2012
    kvietor
    After doing some conservative driving the last couple of charges (45-50mph), I got my projected range to 325 miles. Planning a trip from Tampa to the Kennedy Space Center tomorrow. Let's aee what's still left when I get back. Round trip is about 250 miles.
    �
  • Nov 24, 2012
    dmetcalf
    How'd you do? Did you stop by the house?
    �
  • Nov 28, 2012
    Oyvind.H
    And how did it go :) ?
    �
  • Dec 8, 2012
    dmetcalf
    Looks like my earlier post deleted. My son and I are going for it in FL- 400+ miles from our house down the center of the state to Alligator Alley and back up to Lake Okechobee. Started at 12:22 am. Check our progress on Twitter at dmetcalf. Mods, feel free to repost pics- just hard to do while on the road : ).



    Mod Note: It didn't get deleted Dave, you got given your own thread once we realized your were underway! :smile:
    �
  • Dec 8, 2012
    vfx
    Here is the thread to follow Dave:
    Dave Metcalf's attempt at 400 miles (live today))
    �
  • Apr 3, 2016
    Bankroetlama
    So how many people already did this challenge? There were prizes for the first 10
    �
  • Apr 3, 2016
    Ames
    Dave Metcalfe and Son, and Bjorn + Morgan in Norway. I didn't come across any others.
    �
  • Apr 3, 2016
    Bankroetlama
    • Người đăng: vào lúc

    Không có nhận xét nào:

    Đăng nhận xét

    Đăng ký: Đăng Nhận xét (Atom)