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Bowlus Road Chief Cross Country Trip
- Thread starter idoco
- Start date
Thanks for your latest blog post. Looks like a great trip in Eastern Canada. What kind of Wh/mi numbers are you getting lately when towing?
Not really keeping as close track now that we have more experience towing the trailer. I know my range is 150-185 miles depending on weather and elevation. We usually keep each leg between charges <140 miles.
Generally I go whatever speed keeps my wH/mile between 475-500. Pretty much ignore the speedometer. That usually translates to 52-54 mph if weather and elevation aren't an issue.
I'll go faster on short legs where range isn't an issue. At 62mph it's around 600 wH/mile. Or about 130-135 mile range.
Thanks for the data. On level dry roads with no headwind my Wh/mi numbers when towing are the same as yours. The numbers are quite speed-sensitive, all other factors being equal.
aesculus
Still Trying to Figure This All Out
Yeah. Here is the EVTO formula just for the air resistance piece:
air_kwh = distance * air_density * (speed**2) * drag_area * constant
So doubling the speed has a quadruple factor since it's squared (ie 1.5 > 2.25).
Drag area you are stuck with but is trailer dependent.
Interesting also is that you get penalized at lower elevations. The good news is that rather than an ICE car, which degrades at higher elevations due to oxygen starvation, your EV works just as well. And the air_denisty is also affected by temperature too so cold adds to inefficiency too. Stay away from Death Valley in the Winter.
AltoGrayhound
Member
Hi idoco.
Here is a post that I did in Model X towing a Safari Condo A-2124 trailer
If anybody wants to update the info it is welcome.
Here is a post that I did in Model X towing a Safari Condo A-2124 trailer
If anybody wants to update the info it is welcome.
mbp11
Member
Oh to have a 100D and 20% more range!
As for the GF...it depends on your travel pace. With the trailer we try to keep it under 200 miles a day. In mainland North America with the super charger network we've done upto 500 miles in a day with the trailer.
aesculus
Still Trying to Figure This All Out
Geeze. That is a strain on me without a trailer and a 90D.
To be fair it was only 458 miles. And I definitely don't recommend it. It was a long day! We were trying to beat bad weather moving in.
What made it possible was that we were in a supercharger dense region. So I could stay in the 20-80% SOC range which made for frequent, but relatively quick charging stops. Also the SC density allowed me travel at a faster speed. Finally we had a tailwind.
aesculus
Still Trying to Figure This All Out
With a trailer that is the best scenario, the worst being a headwind of course.
I take a one way 500 mile trip each winter with dense chargers too until the last leg. The SC "sipping" is definitely ideal.
The last leg I charge to 90% and it usually has a tailwind, can be -10C and is downhill so I get to my destination with about 20% SoC remaining.
On the return it seems everything conspires against me. It has a 2000 foot delta of climbing, cold again, generally a headwind of more than 20 mph and only a RV park for backup (never used). Plus I charge to 100% just before I leave so the battery is warm, turn on range mode and turn the cabin control down to about 50 and use the seat heaters.
I often find a semi that I sit close behind for the first 120 miles or so until I get over the pass. As soon as the car shows 10% arrival SoC estimate on the navi I just drive to maintain that. At about 30 miles out I can get back to speed.
With a trailer I would not even know where to begin and you cannot draft safely while towing.
mbp11
Member
You have really nice photos.
Where is your home destination? You are driving by yourself now.....
Where is your home destination? You are driving by yourself now.....
Thanks. It's really hard not to have good pictures in Newfoundland. Every turn in the road could be a scenic overlook.
Solo now...if you count three dogs as solo
More room...fewer hands. Home is Philly area.Similar threads
