Smooth Bore Question

Discussion in 'Tanker, Bulk and Dump Trucking Forum' started by OldRed98, Apr 10, 2018.

  1. OldRed98

    OldRed98 Light Load Member

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    Hello,

    I recently got a good deal on a smooth bore tanker.. Never have pulled a tanker before.

    Going to be pulling a lot of water this summer. The problem is that my source of water is on top of a fairly curvy mountain road. I've mapped out the best route without major steep grades. I ran my step deck up loaded with IBC totes yesterday and was surprised how hard the road was only running 55,000 lbs. Much less 80,000 lbs in a smooth bore tanker.

    My other concern is that my tanker holds 5700 gallons.. just running rough numbers I'm concerned I might be overweight if fully loaded. I'm estimating 5300 gallons to put my rig at 80,000 lbs.

    Will 400 gallons short of full make the tanker slosh a lot worse? At least I don't have any scales on my route but you never know what DOT might surprise you with.

    Has anyone ever used baffle balls? They're pretty expensive but are supposed to really reduce tank surge. Although for the cost it might be better to just buy a baffled trailer.
     
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  3. Cottonmouth85

    Cottonmouth85 Bad Influence

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    I always kept a bottle of water on the dash to kind of gauge what was happening inside the tank.
     
  4. OldRed98

    OldRed98 Light Load Member

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    Good advice there Cottonmouth85! Thank you
     
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  5. wis bang

    wis bang Road Train Member

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    Water is 8.463 pounds per gal so 5300 is 44,854# while 5700 would be around 48,240#.

    Either way the surge won't be as much as a partial load. We always taught trainees that they should do 1/2 the exit ramp speed -or less- to control the surge on curving ramps.

    Keep your speed down and be 'SMOOTH' with everything you do. If the load appears to be moving a lot and you feel a side to side motion, let it happen!

    Fighting that motion WILL get you in trouble...

    Remember that stopping will be affected by the surge, start stopping early and once you stop, keep your foot on the brake. An almost shell full tank won't slop up and push but a lot of guys find our that partial loads of heavy product will rebound and push you out into the intersection...

    I've witnessed a well shaken load of sulfuric acid [15.+ lb/gal] slide a rig ahead a foot sitting on the shop floor with the parking brakes on...

    Steady, smooth and slow down
     
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  6. okiedokie

    okiedokie Road Train Member

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    Watch those corners. Product in smooth bores like to creep up the sides. Like wis bang said easy does it.
     
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  7. daf105paccar

    daf105paccar Road Train Member

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    Air or springride?
     
  8. mustang190

    mustang190 Road Train Member

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    If you can, fill it up!
    5700 is a small tank. Most of ours are 6200-7000 gallons.
    Just watch your speed downhill.
     
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  9. OldRed98

    OldRed98 Light Load Member

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    Its a springride
     
  10. OldRed98

    OldRed98 Light Load Member

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    Colorado
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    Thanks for the advice everyone! Sounds like if I go slow then I should be okay.

    The chances of being caught only a few thousand overweight is slim. Plus I can run my loads anytime I want. Hoping a full tank will reduce my tank surge.

    I guess its a little freaky. I have to load up on the mountain and run an hour down hill. I don't really have a chance to learn hauling a tanker on the nice flat straight road. I'm a slow cautious driver at least and there's not much traffic on my route. So might as well learn to driver the tanker down a curvy road.
     
  11. daf105paccar

    daf105paccar Road Train Member

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    Auch.
    Take it real slowwww in the curves
     
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