Trucking Jobs New Driver Jobs Flatbed Jobs Tanker Jobs Refrigerated Jobs Auto Hauler Jobs
Page 1 of 17 12311 ... LastLast
Results 1 to 10 of 163
  1. #1
    Road Train Member Rerun8963's Avatar
    Member Since
    Mar 2006
    Location
    ova-hereee
    Trucker?
    22 Years
    Posts
    3,917
    Thanks
    1,059
    Thanked: 1,965 Times

    Empty trailers take longer to STOP

    I seem to have a person here on these boards, (Tankergirl) who disagree's with what is the truth about stopping a loaded trailer over an empty trailer..



    given weights, speeds, traction, it will ALWAYS TAKE LONGER to stop an empty trailer over a fully loaded one.....I DO NOT give out wrong advice to newbies, how can I when we have videos and book materials that prove this fact..??

    here is one section, from a state CDL Manual mind you on this:

    Section 6.1.3 Brake Early

    Control your speed whether fully loaded or empty.
    Large combination vehicles take longer to stop
    when they are empty than when they are fully
    loaded. When lightly loaded, the very stiff
    suspension springs and strong brakes give poor
    traction and make it very easy to lock up the
    wheels. Your trailer can swing out and strike other
    vehicles. Your tractor can jackknife very quickly.
    You also must be very careful about driving
    "bobtail" tractors (tractors without semitrailers).
    Tests have shown that bobtails can be very hard to
    stop smoothly. It takes them longer to stop than a
    tractor-semitrailer loaded to maximum gross
    weight.
    In any combination rig, allow lots of following
    distance and look far ahead, so you can brake
    early. Don't be caught by surprise and have to
    make a "panic" stop.


    ----------------------------

    here is yet another from Section 2 of the CDL Manual:


    The Effect of Speed on Stopping Distance.
    Whenever you double your speed, it takes about
    four times as much distance to stop and your
    vehicle will have four times the destructive power if
    it crashes. High speeds increase stopping
    distances greatly. By slowing down a little, you can
    gain a lot in reduced braking distance. See Figure
    2.11
    Stopping Distance Chart
    Miles
    Per
    Hour
    How Far
    The Rig
    Will
    Travel in
    One
    Second
    Driver
    Reaction
    Distance
    Vehicle
    Braking
    Distance
    Total
    Stopping
    Distance

    15 mph 22 ft. 17 ft. 29 ft. 46 ft.
    30 mph 44 ft. 33 ft. 115 ft. 148 ft.
    45 mph 66 ft. 50 ft. 260 ft. 310 ft.
    50 mph 73 ft. 55 ft. 320 ft. 375 ft.
    55 mph 81 ft. 61 ft. 390 ft. 451 ft.
    Figure 2.11

    The Effect of Vehicle Weight on Stopping
    Distance. The heavier the vehicle, the more work
    the brakes must do to stop it, and the more heat
    they absorb. But the brakes, tires, springs, and
    shock absorbers on heavy vehicles are designed
    to work best when the vehicle is fully loaded.
    Empty trucks require greater stopping distances
    because an empty vehicle has less traction



    ------------------

    i really wish she wouldn't go around saying i give out wrong advice...

    how can i, when it's documented.....????

    by the way, this WILL BE IN ALL CDL MANUALS across the country, as well as the training films schools will have to show the students, as it's REQUIRED training material, and questions WILL BE ASKED at the DMV....(the written portion of the tests)

  2. The Following 5 Users Say Thank You to Rerun8963 For This Useful Post:


  3. #2
    Road Train Member Boardhauler's Avatar
    Member Since
    Dec 2008
    Location
    Ballin' in it for Shakey
    Trucker?
    WannaBe
    Posts
    1,132
    Thanks
    679
    Thanked: 704 Times
    So.... At the very bottom of a long steep hill I will be able to stop quicker at 80K than I can empty?

    Guess I learned something new today.

  4. The Following User Says Thank You to Boardhauler For This Useful Post:


  5. #3
    20 Year Truckload Veteran jlkklj777's Avatar
    Member Since
    Oct 2007
    Location
    Duncannon, Pa
    Trucker?
    20 Years
    Age
    45
    Posts
    1,865
    Thanks
    643
    Thanked: 1,021 Times
    Some times people have disagreements based on what they were taught. It is difficult to convince someone that they have been taught incorrectly or were misinformed.

    The best we can do is offer our viewpoint and substantiate it with as may sources as possible. The more supporting documentation offered the greater the chance of correcting the misinformation.

    Keep up the good work Rerun8963.

    Remember; "A wise man can learn more from a fool, than a fool can from a wise man."

  6. The Following 2 Users Say Thank You to jlkklj777 For This Useful Post:


  7. #4
    Road Train Member Moosetek13's Avatar
    Member Since
    Nov 2010
    Location
    Burnsville, MN
    Trucker?
    4 Years
    Age
    59
    Posts
    4,131
    Thanks
    854
    Thanked: 2,253 Times
    Quote Originally Posted by Boardhauler View Post
    So.... At the very bottom of a long steep hill I will be able to stop quicker at 80K than I can empty?

    Guess I learned something new today.
    Yes, if you took the hill in the proper gear and at the proper speed so as to not overheat your brakes on the way down.

  8. #5
    Medium Load Member
    Member Since
    Jul 2010
    Location
    Somerset,MA
    Trucker?
    0-1 Year
    Age
    34
    Posts
    302
    Thanks
    72
    Thanked: 56 Times
    Good info for sure,we are taught something similar in H8 class(Army recovery school) or were anyways..lol..empty we are mopre apt to slide then loaded.Thats why most Army units around here will not authorize a truck to go out bobtail if its snowing or raining.

  9. The Following 3 Users Say Thank You to M915A4 For This Useful Post:


  10. #6
    Road Train Member Tazz's Avatar
    Member Since
    Oct 2009
    Location
    Lynchburg,Tn
    Trucker?
    11 Years
    Posts
    2,816
    Thanks
    1,247
    Thanked: 1,126 Times
    You should have put the term in General in front of your statement.

    Air Springs and ABS braking systems have changed the dynamics of stopping empty, and as someone posted at the bottom of a hill on clear dry day is far different than a panic stop at a red light on new years day in an ice storm.

    I hate to burst your bubble but you are not 100% correct nor is that book your quoting(shocker a government agency got something wrong I know).






    All that aside let it go. Way more important things in life than winning a message board P off.

  11. The Following 4 Users Say Thank You to Tazz For This Useful Post:


  12. #7
    Medium Load Member TruckerGsch's Avatar
    Member Since
    Dec 2010
    Location
    NJ
    Trucker?
    6 Years
    Posts
    462
    Thanks
    10
    Thanked: 118 Times
    Ok lets put it this way. Say tankergirl weights 125 lbs I weigh 350. She runs to you and stop inches from you do you think it is going to be that easy for me to do the same. lol

  13. The Following 2 Users Say Thank You to TruckerGsch For This Useful Post:


  14. #8
    The Grandfather of Flatbed
    Member Since
    Jul 2009
    Location
    A.W.O.L
    Trucker?
    No Answer
    Posts
    5,819
    Thanks
    441
    Thanked: 7,592 Times
    It is foolish to think you can stop quicker with a loaded trailer than an empty in all circumstances....

    An empty trailer might have a tendency to skid a bit more than a loaded but you will usually still stop quicker with the empty.

  15. The Following 8 Users Say Thank You to blackw900 For This Useful Post:


  16. #9
    Road Train Member Tazz's Avatar
    Member Since
    Oct 2009
    Location
    Lynchburg,Tn
    Trucker?
    11 Years
    Posts
    2,816
    Thanks
    1,247
    Thanked: 1,126 Times
    Or a half loaded 6000 gal smooth bore trailer as opposed to a empty smooth bore.

    As I said qualifiers should have been used. He was quoting a book used to cover basics and not real world or up to date information. Does anyone even run spring ride anymore?

  17. The Following 2 Users Say Thank You to Tazz For This Useful Post:


  18. #10
    The Grandfather of Flatbed
    Member Since
    Jul 2009
    Location
    A.W.O.L
    Trucker?
    No Answer
    Posts
    5,819
    Thanks
    441
    Thanked: 7,592 Times
    When all that you know comes from a book....That's all that you know!

    In the "real world" we know what really happens!

  19. The Following 8 Users Say Thank You to blackw900 For This Useful Post:


Page 1 of 17 12311 ... LastLast

Posting Permissions

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