this is really usable, do you have any idea how much does it weights more than normal system? or how much in total
truck should be under 7490kg for being able to travel anywhere anytime as tow truck and they are always problematic with payload
that is not bad trailer
how does that steers? by rods or hydraulics?
Why do so many Americans hate European trucks?
Discussion in 'Trucks [ Eighteen Wheelers ]' started by snowbird_89, Jun 10, 2011.
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here 99% all semitrailers are rear tipper, many years ago majority of them were 3side , but they are heavier, build higher from frame, cost more, not so stable ( although when it get really problematic with stability, you can open sideboards and be more safe than rear tipper)AModelCat Thanks this. -
2. Yeah I think its pretty neat. Only trouble with being specialized like that is it isn't very versatile for any other freight.
3. The pole has a kingpin and pipe bunk at the truck end and a pipe bunk at the trailer end, so the loaded pipe stays parallel to the pole. Trailer bogies are on a swivel bearing below the bunk. 2 long cables with turnbuckles run between the truck and trailer. The cables are crossed so that it pulls the trailer bogie the opposite direction of the truck. The trailer tracks in almost the same path as the truck. -
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2. this is good part, otherway some people in suits would see opportunity to earn on special transport but at same time being able to drive cheap other loads, over time prices for special transports would become funny
3. here nothing in between is required, except in italy, their law requires trailer to be connected to truck
when empty trailer is being tow behind truck
-trailer can turn by rods, turntable under load is on bearing same as your but underneath are rods that connect it with turntable above axle, this is primitive system and nearly out of use
-turntable under load and turntable above axles are connected with 2 cilynders it tracks better, works softer and it is better in any detail
-best solution is with 4 cylinders load turntable is connected with 2 cylinders that powers other two that turn axle , but valve package and some electronics are in between to give best possible properties it is combination of forced steering and selftracking
AModelCat Thanks this. -
I think the biggest reason we still use cables on our pipe trailers is simplicity. They haul the pipe directly to the pipeline, which could be a long way away from civilization (and spare parts). Plus a lot of pipeline construction is done in winter and cold weather is a killer on hydraulics. Even winter seals have a hard time keeping oil in at -35. At least if a guy snaps a cable, its field repairable with a couple Crosby clamps or a length of chain. Its not always practical to carry an assortment of hoses, hydraulic fittings and spare cylinders into the bush.Bean Jr. Thanks this. -
driver have remote if he needs to steer it in some special cases, but during normal ride it combine stelfsteering and forced steering to achieve same tracks as truck
well cables are prone to fail, simple rods not
30years ago italian semitrailers were steered by wires i have seen one of these italian calabrese in october waiting to be scraped -
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