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How much range reduction from pulling a Uhaul trailer?

Discussion in 'Model Y: Driving Dynamics' started by cstork, Nov 17, 2020.

  1. cstork

    cstork Supporting Member

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    Wind drag is the major item using power when driving on a highway. I assume this drag is dramatically higher when pulling a trailer. Is it a 1.5x range reduction? 3x? Does anyone have and experience here?
     
  2. Watts_Up

    Watts_Up Active Member

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    #2 Watts_Up, Nov 17, 2020
    Last edited: Nov 17, 2020
    There are several threads on TMC and videos on YouTube dealing with drag effect.

    Typically you can expect 20 to 40% of losses.

    In the case of roof rack or trailor hitch with bicycles, the measurements were done at 65 to 70 miles per hour.

    But in the case of a trailer, the speed was lower, like 50 to 55 miles per hour.

    In the case of a trailer, most of the comments were based on the Model X, but results should be very similar for the Model Y.
     
  3. jsight

    jsight Member

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    The type of trailer matters a lot. Here's a great example of a reduction to barely 100 miles:
     
  4. Quorky

    Quorky Member

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    I pulled a 4x8' trailer with a model 3. Weight is less an issue than aerodynamics. A trailer loaded with flat boxes about a foot off the trailer (ikea flat boxes - wardrobes) yielded about 350w/mi while a squat rack that stuck out a foot above car height with 2 times the weight of the ikea boxes (1k lbs for rack + meat, some tools, ice to keep meat frozen, Olympic weights) + 2 kids, wife and a bunch of misc, yielded about 440w/mi...
     
  5. InternetDude

    InternetDude Member

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  6. fly4fun

    fly4fun Member

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    I pulled a lightly loaded 5x8 UHaul box trailer with my MY on an 87 mile round trip.
    I averaged 370 Wh/mi vs 231 Wh/mi for the same trip without the trailer
    Speed was 55-60 most of the trip with the trailer, and 60-65 for the same trip without the trailer.
    If I did the math right, this means a range reduction of roughly 1/3.

    This is quite a bit less range reduction than what you'd get with most travel trailers since they have way more drag than the little UHaul.
     
  7. Trinity636

    Trinity636 Member

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    Huge reduction. I lost about a 1/3 of my range.
     
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