You are obsessed CF. The OP asked about the difference between A Frames and Caravan Chassis. Not B doubles or any other foreign crap you have wet dreams about.
What you going to do when you pass your driving test?
I had a few months driving a wagon & drag for Alstons the furniture people of Ipswich a few years ago on the northern Ireland run and a couple of memorable incidents come to mind. On one of the Liverpool Belfast ferries they would put us on first and we could swing around on the car deck but on the other it was a case of reversing down the ramp and onto the boat, a bloody nightmare !!! The other time was delivering to a place in Ballymena, couldn’t get it right no how so was told to unhitch it an half a dozen fellas out of the warehouse pushed it into position. I felt a right burke ( on both occasions) but was told it was normal practice.
Wheel Nut:
You are obsessed CF. The OP asked about the difference between A Frames and Caravan Chassis. Not B doubles or any other foreign crap you have wet dreams about.What you going to do when you pass your driving test?
That was a bit selective wheelnut I was only replying to d4c24a’s and JIMBO’s comments which they put first 
.
I’d already answered the OP’s question long ago and I passed all my licence driving tests more than 25 years ago and then had to pass the company one which was better and more difficult than all those to drive demount drawbars so I think the OP can trust what I said about the difference between A frames and caravans . 
Unless you know better and I’ve got it all wrong. 
Pat Hasler:
Here’s one of my company ‘Drawbars’ …
0Two 48ft trailers pulled by a 15 ft tractor
Blimey! I’d love to have a go, although preferably somewhere where there’s not too many people about to start with! Do you just try to concentrate mainly on where the rear trailer & bogie are heading, or do you literally have to keep watching everything? I’d also be interested to know, although this looks much more difficult than a standard UK a-frame drawbar due to the extra points of articulation, do regular artic drivers pick up reversing one of these easier than a rigid/trailer combination? …although having said that, I guess with a 15’ unit you’ve pretty much got a rigid on the front anyway!
We only pull them on two interstate highways, I-87 in NY and I-90 in MA, there are ‘Doubles’ changeover compounds at most exits and each trailer has t be pulled individually to the delivery point.
Although I have a licence to drive these doubles I pull liquid tankers and not only are they not equiped to run double, it would be uncontrolable to pull two liquid loads without tank baffles which is a relief for me because I find the thought of pulling these monsters nowhere near entertaining
Wheel Nut:
Roger Breaker:
d4c24a:
this blokes qiute goodSeen that a few times on here, but I had to watch it again, never ceases to amaze me! I know several people that’d make a worse job of that with just the 6-wheeler alone!
We had a Daf 2500 with an A-frame at the place I worked when I left school. Whenever it was out in the yard i’d go and have a practise with it, takes some mastering though, and ours was a flat! I always remember sitting in a busy Cherwell Valley services in my 7 1/2 tonner, and watching this guy sail in with his tilt-bodied MAN A-frame, pull up in front of me, and back in a space between two other motors like he was in his car! I was only 18, but he left me with my jaw on the steering wheel!It is great to watch a proper lad or lady on one, it still amazes me to think back to the ferries in Pireaus and all the Greeks turning up with old wagon and drags with produce. The normal procedure was to line up in the ferry door, then they pulled their mirrors in and just followed the finger of a loading officer. They packed them in like sardines and you never saw them lose any sweat.
I drove them for around 2 years and became reasonably adept. I wouldn’t mind having another go 30 years later in a large open space.
The Dutch and Germans make it look so simple too, but they are brought up with them and they are still common.
A lovely example of a proper motor
Now that’s a cracking wagon Wheelnut, I drove a couple of Daf 6x2 rigids in the 80’s & I loved them,no drag though. Proper lorry & cracking bed if alittle cold at night with all that glass.
Pat Hasler:
We only pull them on two interstate highways, I-87 in NY and I-90 in MA, there are ‘Doubles’ changeover compounds at most exits and each trailer has t be pulled individually to the delivery point.
Although I have a licence to drive these doubles I pull liquid tankers and not only are they not equiped to run double, it would be uncontrolable to pull two liquid loads without tank baffles which is a relief for me because I find the thought of pulling these monsters nowhere near entertaining
Tankers without baffles 
.
wheelnut will get upset again with more posts about A trains.
So I thought I’d post a western type yank tanker drawbar outfit. 
Carryfast:
Tankers without baffleswheelnut will get upset again with more posts about A trains.
He will get more upset thinking you are going to lecture us about tankers and thinking Pat doesn’t know his job. Before you start a fire engine is not a road tanker. The centre of gravity is much lower for one.
Plenty of tankers on the roads without baffles. If you have a two compartment tank without baffles the forces can work against each other, which can be fun on slippery roads.
I have never pulled two tankers on a drawbar outfit, so you may have me at a disadvantage there, but don’t even think of mentioning beer cans or bottles 
Wheel Nut:
Carryfast:
Tankers without baffleswheelnut will get upset again with more posts about A trains.
Before you start a fire engine is not a road tanker. The centre of gravity is much lower for one.
Plenty of tankers on the roads without baffles. If you have a two compartment tank without baffles the forces can work against each other, which can be fun on slippery roads.
Looks high enough to me and that’s before the tank with 3000 gallons + on board had been fitted but definitely had plenty of baffles in it luckily.
I was on drawbars with demount bodies for BRS Oxford (Habitat contract) for seven years , hated it at first but then began to love it . Hated bx swapping out side the yard though !!! .
i absolutely love driving drags (draw bar).if it was up to me i wouldnt drive anything else,unfortunately we do alot of artic work aswell.i do look very amateurish reversing an artic after being on the drags for a couple of weeks.
Ah thank the lord, I was missing Carryfast lecturing people on how to drive vehicles he’d never driven.
Carry on…as you were.
switchlogic:
Ah thank the lord, I was missing Carryfast lecturing people on how to drive vehicles he’d never driven.Carry on…as you were.
Sometimes might have ‘argued’ and ‘commented’ about many different issues but that’s not the same thing as ‘lecturing’ anyone about ‘how to drive’ anything. 
But suggest you read the title of the topic which applies to vehicle types that I’ve certainly ‘driven’.
Carryfast:
switchlogic:
Ah thank the lord, I was missing Carryfast lecturing people on how to drive vehicles he’d never driven.Carry on…as you were.
Sometimes might have ‘argued’ and ‘commented’ about many different issues but that’s not the same thing as ‘lecturing’ anyone about ‘how to drive’ anything.
Ah now I was only taking the pee in a light hearted manner.
Well I’m not as knowledgeable as some on here i.e bhp/turbo etc ,i turn the key after checks) and if it starts then i feel quids in.
I have driven most types in my 41 years but mostly artics with either flat/box/taut, wide/ long /high delicate/hard/steel etc etc. now i am back again on the car transporter wagon n drag, loading is something else but driving forward or back is obviously different than a artic. the same rules apply tho, learn what each individual motor does,i.e. basic artic reacts differently to a six wheel ,basic trailer reacts differently to a rear steer and the wagon an drag react totally different.
So each has their faults/best points but you cannot compare them to each other due to the set up.
As for road train type then thats on another level which the majority of UK drivers can only dream of having a bash at.
Used to drag them years ago behind the old Bedford 4 tonner
We used to drop it spin round and couple it to the front and push it in.
The Bedfords had no power steering so it was easier to do it that way.
Although once when I went home in one my old man backed it up with no problems.
youtube.com/watch?v=pnlAzUqWgwk
That’s the way to do it!
Watch and learn, people
Inselaffe:
http://www.youtube.com/watch?v=pnlAzUqWgwkThat’s the way to do it!
Watch and learn, people
Hence the reason why we are not talking about caster steer trailers on this thread, yet.
Look another one without a turntable
I wish I could force my trailer round a corner. Maybe we need smart tow installed