Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

What causes "Dragn'fly" (Drag and Fly)?

Discussion in 'Ask An Owner Operator' started by txmoorej, Apr 25, 2011.

What causes "Dragn'Fly" (Drag and Fly)?

  1. Terrain

    7 vote(s)
    29.2%

  2. Load Weight

    7 vote(s)
    29.2%

  3. Load Distribution

    3 vote(s)
    12.5%

  4. Poor Shifting Technique

    4 vote(s)
    16.7%
  5. *

    I don't know, what?!

    4 vote(s)
    16.7%

  6. Other (Please Explain)

    8 vote(s)
    33.3%
Page 2 of 4
  1. Apr 25, 2011 #11
    American-Trucker

    American-Trucker Road Train Member

    10,371
    5,085
    Nov 8, 2009
    Charlotte, North Carolina
    0

    Thats because they go 62mph all day long and 15mph up all the hills, so to try to make up time and to piss off us drivers with fast(er) trucks off they let gravity pull them down the hill and as soon as is levels out they are right back in the back of the line where they belong....



    American Trucker
     
    American-Trucker, Apr 25, 2011
    American-Trucker, Apr 25, 2011
    #11
    txmoorej Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Apr 25, 2011 #12
    CCCowgirl

    CCCowgirl Light Load Member

    95
    54
    Apr 11, 2011
    Montmorenci, SC
    0
    I never met a truck loaded heavy that wouldn't fly down the hill - maybe I'm not computing that part of the question?
     
    CCCowgirl, Apr 25, 2011
    CCCowgirl, Apr 25, 2011
    #12
    txmoorej and SHC Thank this.
  4. Apr 25, 2011 #13
    FLATBED

    FLATBED Road Train Member

    6,665
    5,501
    Sep 14, 2008
    Back behind the Wheel and out of the OFFICE
    0
    "Diesel Engines dont engine brake on there own like gas engines do" :biggrin_25515: Any internal combustion engine will slow against its compression.
     
    FLATBED, Apr 25, 2011
    FLATBED, Apr 25, 2011
    #13
    txmoorej and Joetro Thank this.
  5. Apr 25, 2011 #14
    rodknocker

    rodknocker Road Train Member

    1,242
    584
    Dec 18, 2008
    Southeast
    0
    I've noticed some people have a truck that goes up a hill but won't go down very good. I supose those are called flyn'drags
     
    rodknocker, Apr 25, 2011
    rodknocker, Apr 25, 2011
    #14
    txmoorej Thanks this.
  7. Apr 25, 2011 #15
    Pa geargrinder

    Pa geargrinder Light Load Member

    58
    12
    Aug 1, 2010
    Pa
    0
    ........................................................................................................

    Long story made short - Gravity as mentioned and the Numerous other variables, Mechanical and human ! lol
    :biggrin_25514:

    Is this really that hard to comprehend ?




    Pa.
     
    Last edited: Apr 25, 2011
    Pa geargrinder, Apr 25, 2011
    Pa geargrinder, Apr 25, 2011
    #15
    txmoorej Thanks this.
  8. Apr 25, 2011 #16
    txmoorej

    txmoorej Bobtail Member

    22
    5
    Jul 14, 2009
    Dallas, TX
    0
    It's kind of a weird question, huh? Sure, a heavy load should roll down a hill faster than a light load, but why do light loads sometimes require so much more effort to get up that same hill than a heavy one? See what I mean?
     
    txmoorej, Apr 25, 2011
    txmoorej, Apr 25, 2011
    #16
  9. Apr 25, 2011 #17
    SHC

    SHC Spoiled Rotten Brat O/O

    8,484
    7,047
    Feb 26, 2011
    Westville, IN
    0
    I voted "Terrain" just because you have to have a hill to drag up and go down.... if you didn't then your question would be pointless (kinda already is LOL)

    But the main cause besides that is just weight. 44k+ and your gonna drag up the hill, and coast back down. Newton's law
     
    SHC, Apr 25, 2011
    SHC, Apr 25, 2011
    #17
    txmoorej Thanks this.
  10. Apr 25, 2011 #18
    LandShark

    LandShark Road Train Member

    1,525
    1,064
    Nov 22, 2008
    Riverdale, Ga
    0
    my my my
    these are the guys driving out there now.
    OH LORD...
    this is something you should have learned in second grade...
    GRAVITY remember Sir Issac Newton who had an apple fall on his head...
    ROFLMAO...
     
    LandShark, Apr 25, 2011
    LandShark, Apr 25, 2011
    #18
    Working Class Patriot, txmoorej and Joetro Thank this.
  11. Apr 26, 2011 #19
    txmoorej

    txmoorej Bobtail Member

    22
    5
    Jul 14, 2009
    Dallas, TX
    0
    I suspect it's a bit more complicated than 2nd grade physics.

    In fact, I found this page on the Stanford University's site which warns of "heavy duty physics" and shows how complicated vehicle dynamics can be:

    [​IMG]
    http://www-cs-students.stanford.edu/~mdevine/pinewood/pinewood_derby.html

    It says, "Bottom line: Centering the weight of your car as much as possible toward the bottom, back corner of your car will make it faster during the race."

    If weight centered in the back of a pinewood derby racer can make it race faster down a hill, I wonder if having the cargo weight centered near the back of the of the trailer can make it "fly" down a hill faster.

    Everything else being equal, if gravity makes a rear heavy truck go faster down a hill, shouldn't it, conversely, be harder to "drag" it up that hill?

    If so, this alone would have an effect on performance regardless of equipment or driver behavior.

    Fancy formulas aside, surely some of you, like American-Trucker, have made some observations and can chime in on this. Thoughts?
     
    Last edited: Apr 26, 2011
    txmoorej, Apr 26, 2011
    txmoorej, Apr 26, 2011
    #19
    rodknocker Thanks this.
  12. Apr 26, 2011 #20
    heavyhaulerss

    heavyhaulerss Road Train Member

    3,723
    2,040
    Dec 23, 2009
    AL/TN BORDER
    0
    I wish ya'll stop talking bout me :biggrin_25511:
     
    heavyhaulerss, Apr 26, 2011
    heavyhaulerss, Apr 26, 2011
    #20
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

    • Page 2 of 4