European Tag A Long Trailers

[Nac]

Here is a pic from an Italian equipment magazine. Look at the trailer it 3 axle tag a long trailer it has 1 front axle on a steerable jeep and 2 axles on the trailer it is 26,000 kg trailer (57,320 GVW) 19,600 kg capacity (43,210) weight of trailer 6,400 kg (14,110). Using this set up you are taking the tonge load off the pulling truck so you could pull this trailer with a short wheel base single axle. In Europe this is the main trend for moving machinery. Was wounder if any body has ever seen one in the states like this or if there is any way of me getting one here this is the exact set up i am looking for.

[Nac]

Here is a link to the page:
http://www.fgmcar.it/english/index.html

[badranman]

That's the first one I've seen. That looks like it would work pretty good. I don't know why we don't see them here, I think they'd sell no problem.

[Nac]

My father used to be a truck driver in Italy and that all they used back then. I think because the roads are very tight there and you can use a shorter truck and the trailer will be very movable.

[digger242j]

I wonder if you couldn't get the same results with a conventional trailer resting on a 5th wheel dolly? Or is that what the pictured trailer is anyway?

It raises a couple of more questions. Wouldn't it be awfully tricky to back it up? How would pulling and stopping behavior be affected, particularly in slippery conditions? The weight of the trailer and load is still going to be back there, but it wouldn't be enhancing the traction of the drive wheels at all. Would you need a CDL endorsement for doubles, given the above differences from more conventional setups?

[John Banks]

I wonder if you couldn't get the same results with a conventional trailer resting on a 5th wheel dolly? Or is that what the pictured trailer is anyway?

It raises a couple of more questions. Wouldn't it be awfully tricky to back it up? How would pulling and stopping behavior be affected, particularly in slippery conditions? The weight of the trailer and load is still going to be back there, but it wouldn't be enhancing the traction of the drive wheels at all. Would you need a CDL endorsement for doubles, given the above differences from more conventional setups?

I had the same idea, 5th wheel dolly.

[Nac]

yes I have tought about the fifth wheel dolly but I think it would be a much longer unit and in the trailer pictured it is one solid unit not detachable. A fifth wheel trailer will have a much higher gooseneck and longer also adding more weight to the trailer fifth whhel combo.

[littledenny]

It raises a couple of more questions. Wouldn't it be awfully tricky to back it up? .....

Think your questions are good ones. From my experience seeing trucks in Europe, it seems that many are designed for a shorter turning radius. See a lot of them with tandems and a 20 foot bed, followed with a twenty foot full trailer, one axle on each end, to move standard twenty foot ISO containers. Most semis tend to be single rear axle tractors with tri-axle single tire trailers-and usually shorter overall than the average American truck. Know from personal experience that the Army's standard, over the road 55 foot semitractor and trailer is hard to maneuver drive down a typical single lane European road, especially in town. Don't think I've ever seen a real American truck in Europe - I'm talking a nice conventional rig, full sleeper, 53 foot trailer - sure would be a hit at the truckparks. As another observation, seems like most European dry cargo trucks have soft sides, while you seldom see anything but vans here in North America. All those softsided trailers have big frames underneath, while our vans don't need them.

Still, unless you grew up on a farm, and learned to back a hayrack, I doubt that you'd want to put a full trailer behind a dumptruck, and try to back it up. I've seen guys talented enough to back two hay racks, but I'm not anxious to try it. (Think I'd be there all day :Pointhead )

Guess it would take a bit of research to determine the relative merits of a straight truck and full trailer set up - but I figure since you rarely, if ever, see on on the road, there must be a reason.

[CT18fireman]

I see farmers pulling haywagons similiar in design in the late summer down the local roads. They are not registered though, they are considered a farm vehicle, towed by a pickup. Seem to tow well, I wonder what would happen if you attempted to register one for highway use.

[RonG]

Think your questions are good ones. From my experience seeing trucks in Europe, it seems that many are designed for a shorter turning radius. See a lot of them with tandems and a 20 foot bed, followed with a twenty foot full trailer, one axle on each end, to move standard twenty foot ISO containers. Most semis tend to be single rear axle tractors with tri-axle single tire trailers-and usually shorter overall than the average American truck. Know from personal experience that the Army's standard, over the road 55 foot semitractor and trailer is hard to maneuver drive down a typical single lane European road, especially in town. Don't think I've ever seen a real American truck in Europe - I'm talking a nice conventional rig, full sleeper, 53 foot trailer - sure would be a hit at the truckparks. As another observation, seems like most European dry cargo trucks have soft sides, while you seldom see anything but vans here in North America. All those softsided trailers have big frames underneath, while our vans don't need them.

Still, unless you grew up on a farm, and learned to back a hayrack, I doubt that you'd want to put a full trailer behind a dumptruck, and try to back it up. I've seen guys talented enough to back two hay racks, but I'm not anxious to try it. (Think I'd be there all day :Pointhead )

Guess it would take a bit of research to determine the relative merits of a straight truck and full trailer set up - but I figure since you rarely, if ever, see on on the road, there must be a reason.

When I was in Germany in the early '60's I do remember having to unload my Dozer,(A TD18) and pick up the end of the lowbed and scoot it over a little to get through one town we were going through.I might have done it more than once but I do remember one time for sure.Didn't hurt those cobblestones a bit:))
I did back up a hayrack many times as a kid and did not find it to be much of a problem although I used to dismount and hold the horses bridle and talk him through it while onfoot.
I imagine it would be fun doing it with a tractor. Ron

[littledenny]

I see farmers pulling haywagons similiar in design in the late summer down the local roads. They are not registered though, they are considered a farm vehicle, towed by a pickup. Seem to tow well, I wonder what would happen if you attempted to register one for highway use.

Key point here, at least with hayracks, is that you tow them pretty slow. I spent summers as a young boy baling hay, and can tell you from experience that a hayrack, behind a tractor, tows well, to a point. Get two racks going at any speed and they start to wander back and forth.

I'd think that a full trailer would be less stable at speed, than a similiar sized semi trailer. Seems that the additional joint in the chain, the dolly, would just add to the possibility of additional unstability. You see UPS rigs on the road all the time, tractor, semitrailer, full trailer, and they seem to pull pretty well, but notice that you need endorsements on your CDL to pull combinations - must be a reason for that.

I took Nac's original post as an inquiry on the feasibility of using a full trailer behind a short wheelbase truck. Maybe he will elaborate on exactly what he's considering, so we get a better picture on what he needs.

In my own case, I've got a Chevy 3500 4WD crewcab, long wheelbase, single rear wheel pickup. I want to pull a trailer that can handle a JD 110 TLB, and all the attachments. I've got a car hauler trailer, but it is really overloaded, so I'm looking for a more substantial trailer. I could get a 12000/14000 GVW bumper pull trailer, and probably do fine - The truck can pull it, but it could lighten the frontend of the truck if I get too much weight too far forward on the trailer. Have considered getting a gooseneck trailer, but then I've got to deal with the hassles of removing the cap over the bed all the time. The right answer for me is to trade the truck for a dually flatbed, and get the gooseneck, but I'd hate to trade the 2004 I've got.

Enter the full trailer into the mix - I could get one, have all the weight on the trailer, and have practically no load on the truck. While my truck is quite heavy and stable, I'm not sure that it is heavy enough to control a even heaver full trailer towed behind. Can my truck, at roughly 3 tons plus, pull a 6 or 7 ton trailer up a hill without loosing traction? How is this rig going to feel braking down a mountain road? Is that trailer going to tend to steer itself past me, pulling my hiney to the side? I'm thinking that if full trailers have an advantage, then we'd see a lot of them out there, used by guys like us. All I see in the equation is more weight, more moving parts, and more difficulties in backing.

Nac's situation is probably different - he may be looking at being able to load equipment without having a vehicle already hooked up to the trailer, maybe the ability to leave long/heavy things on the trailer at a job site. I'll let Nac speak for himself.

[CT18fireman]

I get what your saying and that is why I wondered what would happen if you tried to register one.

Another forum showed a shot of Australian Land Trains, where a single tractor was pulling 10+ trailers. Obviously it takes training but the point is that it can be done. A lot of legislation over the years limits us here in the U.S.

It would definately make it easier to tow heavy loads, even on SRW trucks. Even 1/2 and 3/4 ton trucks and SUVscould tow more,as most have plenty of power. My wifes new Pathfinder is rated at 7000lbs and with the V* has the power to pull it. Problem is that when you put 250lbs of tongue weight on it (boat trailer) the back end is sagging (I need to order timbrens). My other fear would be braking, all axles would need to be braked.

[littledenny]

I get what your saying and that is why I wondered what would happen if you tried to register one.

Another forum showed a shot of Australian Land Trains, where a single tractor was pulling 10+ trailers. Obviously it takes training but the point is that it can be done. A lot of legislation over the years limits us here in the U.S.

It would definately make it easier to tow heavy loads, even on SRW trucks. Even 1/2 and 3/4 ton trucks and SUVscould tow more,as most have plenty of power. .....

Don't see why you couldn't register one-UPS runs full trailers. I've seen some full trailers behind utility trucks, to carry new poles. The Military uses some full trailers, as well, but they can get by anywhere, as they're not regulated by DOT, except for bridge weight restrictions. If I remember right, there are full dump and tank trailers in use in California, and I suspect the other western states as well. If anything, there may be some restrictions in the Northeast. A call to your state DOT should answer that question. (This wasn't meant to sound snotty.)

Australian land trains are just UPS vans taken to the extreme, but I'd suspect that the first trailer is a semi- thus loading weight on the back end of the tractor. Motive power is a combination of power and traction. I doubt that a truck, with little weight on it, would pull those 10+ trailers - Might have the power but not to traction. Look at a house mover's rig - most houses are moved in the fashion of a full trailer, but the towing vehicle is always loaded with a heavy weight for downpressure on the drive wheels. Likewise, modern locomotives can have thousands of horsepower, but it's the 100-125 tons of weight that makes the traction. That's my argument against a 1/2 or 3/4, or even a 1 ton truck trying to pull a full sized backhoe on a full trailer. And not to belabor the point, but towards the high end of a typical truck's or SUV's towing capacity, there's the fineprint that specifys a weight equalizing hitch. Again, this is a means of distributing weight so as to maximize the tractive effort, without overloading the rear springs and axle.

Unless someone proves me wrong, (and it's happened a few times), I'd bet that any given vehicle can tow more with some tongue or bed weight, than without it. Before you challenge me with the tractor pulls, consider the point that the sled chain applies some downforce at the drawbar, hense the wheelies. If it were a purely straight pull, there would be no reason to have, or need, wheelie bars, or weight classes for that matter. The classes would then just be by horsepower.

(Pardon me guys, but I do so love a good discussion)

[CT18fireman]

Absoultely traction is key. I always make that point in snowplowing, Motor HP has less to do then weight and good tires. I never bog my motor plowing, instead I am spinning the tires.

Some tongue weight is needed. I am disappointed in the Pathfinder because our older one held weight fine. This one, I think to give a better ride (which it does) has softer rear coils. Thus with a relatively light tongue weight or even to many groceries it sags. It still pulls great but sags.

Finally there is momentum, once that lodomotive gets going it takes a lot less power to keep going, only on the steeper grades is it using all the power. Same for vehicles, I was reading a car magazine once and it said that the 59 T-Bird ( I think ) only needed something like 9hp to keep it crusing at 60 mph on a flat stretch of road. Much more was used to get there though.

[kamerad47]

Nac The problem with that trailer is the the double pivot it's almost impossible to back up even UPS pull then straight in & breaks them down with a switcher. They use them as line hauler from depot to depot & only on interstates.

[Nac]

Nac The problem with that trailer is the the double pivot it's almost impossible to back up even UPS pull then straight in & breaks them down with a switcher. They use them as line hauler from depot to depot & only on interstates.
Well nothing is imposible these trailers can be backed up they do it in Italy. My father was so good at he used to load the ferry boats with truck trailers for the ride from Sicily to Italy.
What I am trying to accomplish if possible to buy A single axle 10-12 body dump 33,000 GVW nor to pay FET and still be able to pull my 160 excavtor (36,000lbs) arouns saftly. I think that machine on a 20 ton standerd tag a long would overload the 33,000 truck

[littledenny]

Finally there is momentum, once that lodomotive gets going it takes a lot less power to keep going, only on the steeper grades is it using all the power. Same for vehicles, I was reading a car magazine once and it said that the 59 T-Bird ( I think ) only needed something like 9hp to keep it crusing at 60 mph on a flat stretch of road. Much more was used to get there though.

You're correct. A fully loaded railroad boxcar, weighing 50 tons, takes 20 horsepower to maintain a given speed on level track. Once up to speed, engineers often shut down one or more of the diesel engines in a multi-engine train down, and simply use the remaining engines to drive the electric motors on all the locomotives. Momentum helps to maintain the train through the small grades, since part of the train going downhill, helps to pull the part going up hill. (This is the tricky part of operating a train, because you can literally have one end of the train going five miles per hour faster or slower than the other end. Parting a train in the middle, because of differential draft and buff forces is a bad thing. :eek2 ) Only on a ruling grade, or one where the entire train is pulling uphill, do they need full power.

[John Banks]

Well nothing is imposible these trailers can be backed up they do it in Italy. My father was so good at he used to load the ferry boats with truck trailers for the ride from Sicily to Italy.
What I am trying to accomplish if possible to buy A single axle 10-12 body dump 33,000 GVW nor to pay FET and still be able to pull my 160 excavtor (36,000lbs) arouns saftly. I think that machine on a 20 ton standerd tag a long would overload the 33,000 truck


My Freightliner will pull that :yup You gotta try the Freightliner!

[kamerad47]

I've driven double trailers it's not impossible but, if you pull down a street & try to back in a job site good luck!! You may need a double cdl! You really should be using a tandem or Triaxle to haul that size machine! plus I wonder what that kind of trailer would do at highway speed?

[woberlin]

There's a guy here that tows a large excavator with a single axle dump-so I know that it can be done. If it's safe or even legal I do not know, but I do know it's one of the scariest looking rigs I've ever seen on the road. That machine dwarfs that truck, and it looks like an accident waiting to happen. I haul my Komatsu excavator with my 34,000 gvw single axle, but it only weighs about 18,000#s, and I don't think I would haul a heavier excavator with it. To me it almost seems that the way in which an excavator distributes it's weight on the trailer makes it's towing characteristics different than say a dozer of the same weight. Behind the single axle it feels somewhat unstable, especially on turns, curves and heavily crowned roads. Behind my tandem axle, it's completely different-much better!

[kamerad47]

I wouldn't want to be in front of that guy coming down a hill!! You wonder about the brakes on a single axle? That's like playing with fire!!!!

[CT18fireman]

If it was set up correctly then braking should not really be an issue if the guy maintained his speed correctly.

On my equipment trailer I have the brakes set up nice, they won't lock up, but I can almost feel them braking the whole trailer and causing a bit of slack in the hitch.

[DR RPM]

We pull tri-axle gravel wagons like that all the time, but most guys are going to quads now to haul more. A few companies are using lowboys with a tandem convertor but not that common but gravel trailers very common :bash

[Landman]

You would be ok with a single axle for your 160 and a 20 ton trailer. We have an international 2900 with a 10' dump body and a 26' deck eager beaver 20 ton trailer and we tow a cat 215 excavator and have no problem, we do not do this everyday either. If you are doing this everyday then you should buy a tandum dump. we have out truck registered at 55,000lbs. If you had a trailer like that around here with all the traffic i think it may cause more difficultly getting around some areas. Also In NJ you would have to get a double/triple trailer endorsement on your CDL to tow that.

[Nac]

I know this is an old tread but was looking threw a magazine my unkle brought me from Italy and all you see are these type of trailers. I still think it is superior to our tagalong trailers. For you guys not from the states do you see these and what is your opinion?

[Ford LT-9000]

This is a old thread.

I looked at the start and that trailer looks like a step deck with a beaver tail and ramps with a converter dolly under it. You can have a custom trailer built that the converter dolly is perminatly fixed under the trailer.

The problem with with a wagon cart is they are a biatch to back up if you never had done it before its frigging frustrating. All it takes is one little bit of a over turn on the truck and the damn trailer is wandering all over.

If you need to haul heavier machines find a cheap truck tractor and lowbed so much easier.

[Nac]

Here are some more pics.

[Nac]

Now looking at the picture it is pretty much like a pup trailer. Could you have the front axle fixed (no swivel)? I know on the triaxle trailer the last axle is self steering

[2004F550]

Seems like the pup trailer from our rolloff, a real pain in the azz if if didn't have truck set up with the switch for pin acuator that keeps the pivot point from moving, if that isn't in place it was worthless unless you only went forward.

[Ford LT-9000]

That teal colored trailer wouldn't back up worth a damn because there is too much drag on the ground and with it being so short there is no leverage to force those tires to slide sideways. I don't think it would pull very well forward either you start making turns its going to be dragging like crazy.

If you are going with a trailer like that make sure its tandem axle on the rear or make it like a transfer trailer with quad axles tandems on the rear and tandems on the front.

[Nac]

Here some more pics i found. The last picture looks like a standard tag a long but has triaxle in the center I wounder if there are 3 guys in that truck for 3 machines.

[sbrem]

Aside from the backing issue they look like they would work real well.

[Ford LT-9000]

The other drawback with those trailers is you have more tires to wear out.

[hvy 1ton]

A couple of my friends fathers can back up 2 wagons and have been known to throw in a third from time to time :eek: (it's about to rain). Now this is with 4020 size tractor (red, orange, blue, ... insert favorite color here...), where you can see everything and it might be a different story with a dumpbox between you and the trailer. I can't seem to back one up if you point a gun at my head, but that's b/c i never use them. IF you can spend enough time dorking with it you should figure it out, although i don't know anyone that learned how to do it past the age of 12, that might just b/c you have be 12 to have enough free time to try it a couple thousand times? :beatsme

[Ford LT-9000]

We use dollys to load trailers onto barges it gets interesting when you have a 988 loader with a dolly so the machine pivots the hitch pivots and the fifth wheel turns. You have 3 pivot points the key is to try keep the dolly straight so it doesn't jackknife and be carefull.

[Dozerboy]

We had one like that for moving bails man that thing was a beast we most only moved it with our tractors, loaded we couldn't move it with our DRW GMC 6x6.

[Squizzy246B]

I've been following this thread with interest and especially the comments on reversing what is, essentially, as we call it, a dog trailer. Must be tens of thousands of 2 & 3 axle trucks down here pulling 3 & 4 axle dogs everyday. Most of our sand gets delivered by dog trailers.

http://www.austip.com.au/pdfs/products/TBB%200606%20ATS%20ed.pdf

When I'm on the loader I tell them exactly where I want the dump and they reverse in the trailer and tip. Then they jack the dog and tip the truck and you'd have think it was done with a semi.

Reversing an articulated axle trailer is not rocket science:confused: Just takes practice thats all. Well...just some comments in this thread seem to make it appear as if the the things are almost un-reversible. JMHO:cool:

[Nac]

Squizzy246B is the 1st axle fixed or does it swivel? That what I think for them to be so popular overseas they must be able to back them up .

[Big Iron]

Reversing an articulated axle trailer is not rocket science:confused: Just takes practice thats all. Well...just some comments in this thread seem to make it appear as if the the things are almost un-reversible. JMHO:cool:

any trailer can be backed, some are just more of a PITA than others and your right it is not rocket science.

the small platform trailers are comman in europe because of there manuverability. there are 2 photos of platform trailers shown. you see these all the time in europe. i have pulled this type of trailer configured with 768 wheels, gross load 9.7M # and it was backed up several times.

now the one that is tough to back up is the multi dolly system,which is the one being pulled by the SX45 Mack (16v71 @ 650 hp) that one is a toughy and will get you :Banghead and at a loss for cuss words:mad:

anyway thought you might like to see some unusual trailers that are a bear to back.

[Ford LT-9000]

This is what we have out here for transfer trailers but those trailers are never taken into tight areas because they don't back up very well. With those boxes the dump truck un-hitches the box on the trailer sides into the box of the dump truck then it can be taken anywhere in the back of the truck.

[Bob Horrell]

The guy that brings me all my aggregate material has 6 transfer dumps and he and most of his guys are real good a backing them. A lot of times they have to back around a corner to leave the job site.
We have a truck/transfer race at our local county fair and the owner has entered every year for over 20 years. He has won something like 14 times and held a record for 8 years. One of the things they have to do in the race is back the truck and transfer through a set of rails that are only one foot wider than the rig without touching the rails. He has even shifted in reverse while backing through the rails - that's how fast he nails it once he is sure he is straight. His son, who is 20 now, started driving one of his dad's trucks at 18 and he also competes in this race. He has been real close to beating his dad - this year he was only 0.3 seconds behind him. Of course, he has been backing his dad's trucks in the yard since he was about 13 years old.
It just takes practice, like anything else and some people just have a knack for certain things.

[Squizzy246B]

Squizzy246B is the 1st axle fixed or does it swivel? That what I think for them to be so popular overseas they must be able to back them up .

Yep, the first or front bogey swivels...that makes it a dog trailer. If the bogey was fixed (no axles at front just axles in the middle), or in a Tag, then it would be a pig trailer.....But I couldn't find any pics of my old Pig Dog (Bull Terrier Staffy cross :D).

They are popular here for Owner Operators because they can run 14 odd tonnes in the 6 wheeler with no trailer, small jobs, cleanups, restricted access etc. Or, they can run the same load as a semi (tractor) with the dog trailer. Some rigs are even running 4 & 5 axle (Superdogs) with a Gross combination of 50 tonnes under new laws.

Bob, I'd love to see that guy reversing his rig in a race. We have one guy here who swears by his old Mercedes Truck and he runs a 3 axle dog trailer. He pulls up on the road and reverses the rig straight in at 90 degress to a pad or wherever I want it..never miss..or I should say never hits a peg (grade stake). He's got both drive diffs with lockers and he leaves a lot of newer rigs for dead on a building site.

[Squizzy246B]

Thanks for the pics Big Iron, heres some trailers built local in my state;

http://www.haulmore.com.au/Custom%20Built.htm

I have no peciunary interest in this company....honest...but I would like to spend some cash with them if I could afford it:crying

[Electra_Glide]

Bob, I'd love to see that guy reversing his rig in a race.

Probably not the same guy that Bob is talking about, but there's a pretty good video on YouTube. Also shows how a transfer truck works for anybody who's never seen one in action (which included me until I saw this video...not somethin' we see in Western PA).

http://www.youtube.com/watch?v=urKuWgtBYxI

This one has some doubles backing at the end of it.

http://www.youtube.com/watch?v=SyWcgdydDzY

Note that no cones or stakes were harmed in any of these maneuvers...:thumbsup


Joe

[sbrem]

here are a few more backing videos.

http://www.youtube.com/watch?v=GaeH_mdKDDo

http://www.youtube.com/watch?v=6xGRv0oTK3Q&mode=related&search=

[Tacodriver]

I have a question for you Nac do those trailers have any way of transfering any weight to the drive axles on the truck? It seems as though any hill or slippry surface would cause problems unless the truck had a load on it.

[Nac]

No because the tounge pivots up and down so no weight is on the truck.

[cat320]

So with that type od sysytem you could tow with less of a truck because no weight is actually on the rear end?

[Nac]

Yes exactly.

[imjustdave]

In my own case, I've got a Chevy 3500 4WD crewcab, long wheelbase, single rear wheel pickup. I want to pull a trailer that can handle a JD 110 TLB, and all the attachments. I've got a car hauler trailer, but it is really overloaded, so I'm looking for a more substantial trailer. I could get a 12000/14000 GVW bumper pull trailer, and probably do fine - The truck can pull it, but it could lighten the frontend of the truck if I get too much weight too far forward on the trailer. Have considered getting a gooseneck trailer, but then I've got to deal with the hassles of removing the cap over the bed all the time. The right answer for me is to trade the truck for a dually flatbed, and get the gooseneck, but I'd hate to trade the 2004 I've got.

Enter the full trailer into the mix - I could get one, have all the weight on the trailer, and have practically no load on the truck. While my truck is quite heavy and stable, I'm not sure that it is heavy enough to control a even heaver full trailer towed behind. Can my truck, at roughly 3 tons plus, pull a 6 or 7 ton trailer up a hill without loosing traction? How is this rig going to feel braking down a mountain road? Is that trailer going to tend to steer itself past me, pulling my hiney to the side? I'm thinking that if full trailers have an advantage, then we'd see a lot of them out there, used by guys like us. All I see in the equation is more weight, more moving parts, and more difficulties in backing.
.

As a bit of advice, don't do it. I have a 06 dodge with a bumper pull trailer. Trailers weighs in between 12K-15K with about 1200lbs on the truck. There are times that I don't have enought traction going up and down hills, Actually one time I stoped on a gravel road and if I didn't have 4wd I woulnd't have started going again up hill. I can't even imagine no weight on the back of the truck, it would be like a truck pull every day, going down the street. I wish I had a goosneck, but in the mean time the bumper trailer will work

[OzDozer]

If you want to haul a 'tag' machinery or plant trailer, as in the Italian and Australian models .. you need to haul it with a rig that grosses at least 2/3rds of the gross trailer weight you're hauling. Anything less, and you're asking for trouble.
Australian truck/machinery trailer combo operators, know to carry a load of dirt, or a machine in the dump box, when hauling loaded machinery trailers.

Backing a 'tag' or 'dog' trailer is no problem, provided the drawbar length is correct. Short drawbars are a no-no, you can't back properly with a short drawbar. Short drawbars also contribute to trailer tailwag.
All the road train trailers, dog trailers, and tag trailers in Australia, with an articulated front axle, or axles .. have long drawbars to facilitate towing and backing ease.

We also have 'tag' trailers, with no front axle, that use a heavy duty, saucer style, coupling known as a 'Bartlett' coupling.
This style of trailer transfers a large % of weight onto the hauling rig, and the hauling rig has to have a heavy duty Bartlett-style hitch, usually consisting of heavy external chassis plating for several feet behind the drive axle, or axles.
Needless to say, Bartlett-style hitches are designed for use with heavy-duty trucks, not pickups ..
Some of the U.S. style, of so-called heavy duty, pickup trailers .. even gooseneck trailers .. are frightening, in their ability to overload pickups ..

http://www.truckhub.com.au/DesktopDefault.aspx?Type=Trailers&Subtype=Plant+Trailer&PriceFrom=-1&PriceTo=-1&SearchMethod=quicksearch&MTA=False&TabID=3443&Alias=truckhubau

http://users.westconnect.com.au/~tagalong/

[busdrivernine]

here is a good video about the reason for shorter trailerand single axle cabovers in Europe
http://www.youtube.com/watch?v=PLWX8TPWsr0