Page 2 of 11 FirstFirst 1234 ... LastLast
Results 11 to 20 of 102

Thread: Aerodynamics of the new Mirage (0.27-0.31 drag coefficient varies with options)

  1. #11
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts
    I've been thinking about this as well - if Mitsu was "fine tuning" the grille block to this extent, it's possible the 1.0L manual version of the car may have even more grille blocked than the 1.2. The Cd 0.27 figure referred to in the U.K. may be for that car. (Update: it is, in both Japan and the U.K.)


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


  2. #12
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts
    Found a little more info on the Cd 0.27 reference - 2 of the 3 Mirage trim levels in the Japanese market have it. (Added info & link to source in post #1)

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


  3. #13
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts

    Showing the impact of Mirage drag coefficient on fuel consumption

    So, we've seen that the car's Cd varies from 0.27 to 0.31.

    How about looking at the effect of that number on fuel consumption?

    I plugged the car's figures into the Aero/Rolling Resistance/Fuel economy calculator at EcoModder, and here's what it spat out, using these constants:


    • Frontal area of 2.04 sq. meters / 21.97 sq. ft.
    • Vehicle weight of 935 kg (865 Australian spec. curb weight + 70 kg driver) / 2060 lbs


    Drag Coefficient
    (link to calculator
    for this value)
    Fuel Economy (est.)
    at 80 km/h
    50 mph
    Fuel Economy (est.)
    at 97 km/h
    60 mph
    Fuel Economy (est.)
    at 121 km/h
    75 mph
    Power required
    to go
    121 km/h
    75 mph
    in Watts
    0.27 (link) 3.63 L/100 km
    64.85 mpg (US)
    4.74 L/100 km
    49.64 mpg (US)
    6.79 L/100 km
    34.66 mpg (US)
    15,174.6
    0.28 (link) 3.72 L/100 km
    63.22 mpg (US)
    4.87 L/100 km
    48.26 mpg (US)
    7.0 L/100 km
    33.62 mpg (US)
    15,645.53
    0.29 (link) 3.81 L/100 km
    61.67 mpg (US)
    5.01 L/100 km
    46.97 mpg (US)
    7.21 L/100 km
    32.64 mpg (US)
    16,116.46
    0.30 (link) 3.91 L/100 km
    60.19 mpg (US)
    5.14 L/100 km
    45.73 mpg (US)
    7.42 L/100 km
    31.71 mpg (US)
    16,587.40
    0.31 (link) 4.0 L/100 km
    58.79 mpg (US)
    5.28 L/100 km
    44.57 mpg (US)
    7.63 L/100 km
    30.84 mpg (US)
    17,058.33

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


  4. #14
    Administrator Daox's Avatar
    Join Date
    Jan 2013
    Location
    Germantown, WI
    Country
    United States
    Posts
    2,933
    Thanks
    1,005
    Thanked 568 Times in 364 Posts
    I must say I'm impressed that the cd is as low as .27. I think I'm impressed mostly because it doesn't look like a .27 car. It just looks like... a car.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


  5. #15
    Senior Member jamiec's Avatar
    Join Date
    Jan 2013
    Location
    Australia
    Country
    Australia
    Posts
    495
    Garage empty: add car
    Thanks
    32
    Thanked 65 Times in 48 Posts
    I agree Daox and i have seen other cars over the years you think how can that car that looks like that have a Cd rating that low.

  6. #16
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts
    It's all in the details! But let's also remember to take this number with a grain of salt -- Cd measurements are said to vary from wind tunnel to wind tunnel.

    But having said that, the proof is in the pudding: we're seeing that the cars are capable of very good economy, which they wouldn't get if they didn't have decent aero.

    And notice that the calculated numbers above line up quite closely with the on-road numbers that Niky got when he tested speed vs. fuel economy of the 1.2L 5-speed Philippines spec car.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


  7. #17
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts
    Just picked up a tidbit of info I hadn't read before: apparently the "backwards baseball cap" aero spoiler is patent-pending by Mitsu.

    (from the clam-shell hood to the – new patent pending – tapered rear roofline)

    http://www.automotiveworld.com/news-...age-efficient/
    I assume they're referring to the spoiler - surely you can't patent a "roofline" on its own.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


  8. #18
    Senior Member jamiec's Avatar
    Join Date
    Jan 2013
    Location
    Australia
    Country
    Australia
    Posts
    495
    Garage empty: add car
    Thanks
    32
    Thanked 65 Times in 48 Posts
    Thats a great article you found Metro. I would think that they would be wanting a patent for the spoiler so others can't copy it and sell them. I would find it hard to belive they could patent the roof line shape to.

  9. #19
    Member
    Join Date
    Apr 2013
    Location
    Sri Damansara
    Country
    Malaysia
    Posts
    73
    Thanks
    1
    Thanked 15 Times in 11 Posts
    Hi Metro, you need to plug in it's gross weight (including oils and water). I found it somewhere before but can't find those figures now.. =(

        __________________________________________

        click to view fuel log View my fuel log 2013 Mirage (Malaysia) GS 1.2 automatic: 44.6 mpg (US) ... 19.0 km/L ... 5.3 L/100 km ... 53.6 mpg (Imp)


  10. #20
    Administrator MetroMPG's Avatar
    Join Date
    Jan 2013
    Location
    1000 Islands, Ontario
    Country
    Canada
    Posts
    5,357
    Thanks
    1,409
    Thanked 1,280 Times in 783 Posts
    My understanding is gross weight is the maximum limit with a full load of driver, passengers, cargo & fuel. If so, that would be overkill. That's why I went with curb weight + driver.

    --

    On another note, Mitsubishi is saying the drag coefficient of the Canada/US Mirage will be 0.28.


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •