Dangerous Bobtail?

Discussion in 'Questions To Truckers From The General Public' started by Kooter, Feb 16, 2009.

  1. Kooter

    Kooter Bobtail Member

    23
    1
    Feb 13, 2009
    Minnesota
    0
    I read somewhere that driving Bobtail is quite dangerous. That seems backwards to me. But then again, I don't know anything about driving a truck.

    Why is it more dangerous?
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Lilbit

    Lilbit Road Train Member

    16,583
    12,232
    Aug 4, 2008
    Let me check my logbook
    0
    Part of the reason it can be considered more dangerous is that you don't have the weight of the trailer and load over the drive tires. Think about driving a car with rear wheel drive.

    I don't think it's any more dangerous than dragging a wagon.
     
  4. RickG

    RickG Road Train Member

    12,812
    6,136
    Jul 22, 2008
    Owensboro , KY
    0
    You've got it . When you brake weight shifts forward off the drive wheels which provide most of the braking . There is already a higher proportion of weight on the front axle . Anyone that has driven a muscle car with a big block engine knows the heavier weight on the the front end has an adverse effect on handling . But it isn't really like driving a rear wheel drive car . Four wheelers are designed for the front wheels to do most of the braking . That's why ABS is necessary . The front wheels won't turn with steady brake pressure on a slick surface .
     
    Mighty Mouse Thanks this.
  5. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

    18,749
    45,401
    Sep 18, 2006
    the road less travelled
    0
    Front brakes are designed to engage slightly later than rear, most tractors with no trailer that I have driven still have about 10k or more on the steer tires versus around 8k on the drives, roughly 10 times the weight per tire that the drives have, the thing is, those lightly loaded tires don't do much braking in slippery conditions.

    The truck will actually really accelerate without the box back there as well.

    It's safer driving a bobtail with ABS but still more tricky than carrying a load.
     
  6. Kooter

    Kooter Bobtail Member

    23
    1
    Feb 13, 2009
    Minnesota
    0
    I knew there had to be a logical explanation for this. I was thinking that you would be able to stop quicker because you don't have all that weight behind you pushing you down the road.

    Is it only more dangerous in slick conditions? Or is it still just as nasty on dry roads?
     
  7. RickG

    RickG Road Train Member

    12,812
    6,136
    Jul 22, 2008
    Owensboro , KY
    0
    We have one customer that takes 3 days to unload a trailer . They pay us to bobtail 250 miles home and come back when the trailer is empty . Braking distance on a bobtail is close to equal to stopping a loaded semi so I haven't had any real problems bobtailing .
     
  8. 25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

    18,749
    45,401
    Sep 18, 2006
    the road less travelled
    0
    Slippery roads are a big problem, dry roads not so much, even without front brakes, the thing will stop on dry roads, if the brakes are working properly.
     
  9. Red Fox

    Red Fox Road Train Member

    1,316
    432
    Jan 26, 2009
    Acworth, Ga.
    0
    Back before ABS brakes, I had to stop suddenly when bobtailing and she spun around and backed into a ditch before I knew what happened. Luckily, neither I nor the truck were hurt, but it taught me a lesson I'll not soon forget. I doubt that ABS would be all that much better in a panic stop.
     
  10. chief

    chief Heavy Load Member

    851
    284
    Jul 15, 2007
    Flavor Country, NC
    0
    That seems backwards to me. me too But then again, I don't know anything about driving a truck. I do

    Braking distance on a bobtail is close to equal to stopping a loaded semi

    huh?!?!? it takes about as long to stop a bobtail as it does a car. when you're cut off driving a fully loaded (~80,000 lbs.) rig, it feels like it take several minutes to stop!!
     
  11. lonewolf4ad

    lonewolf4ad Road Train Member

    7,743
    7,773
    Nov 4, 2008
    Displaced to Colorado
    0
    I've been in a bobtail rig trying to stop in a rush, it takes alot farther than it does a car and you lose control unless you are either doing a great job of stab breaking or have ABS. not having weight on your tandoms means you lose some of your breaking efficiency as they will easily lock up and skid without the weight holding them on the ground.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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