View previous topic :: View next topic |
Author |
Message |
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Wed Apr 06, 2022 7:34 Post subject: |
|
|
Now you've got me thinking, because iirc,the dolly does not steer in relation to the towed vehicle, so will always want to go in a straight line. Best just put it on a recovery truck! _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
Google Sponsor
|
Posted: Wed Apr 06, 2022 7:34 Post subject: Google Ads keep this community free to join! |
|
|
|
|
Back to top |
|
|
Lewis Site Admin
Joined: 25 May 2006 Posts: 16299 Location: Huddersfield
|
Posted: Wed Apr 06, 2022 7:40 Post subject: |
|
|
Stop thinking, your brain will go round in circles and tie you up in unravellable knots. _________________
Copyright is retained for all my photos. Please don't copy them without asking permission
Do not blindly go where the path may lead you. Go where there is no path and leave a trail that others may follow!
ルイス |
|
Back to top |
|
|
Fostlongstrider Lifetime member
Joined: 03 Mar 2008 Posts: 2590 Location: Hedon, East Yorks
|
Posted: Wed Apr 06, 2022 10:40 Post subject: |
|
|
The dolly is attached to the tow vehicle much the same way as a caravan or trailer and pivots at the tow point.
The front wheels are on the dolly and raised off the ground so do not need to steer.
The rear wheels turn in the same way as a trailers do. _________________ Ian.
All the best from the East Riding of Yorkshire.
'93 L300 Super Exceed Corse Gray over Grace Silver.Auto.
Flying Brick Supporter. |
|
Back to top |
|
|
Lewis Site Admin
Joined: 25 May 2006 Posts: 16299 Location: Huddersfield
|
Posted: Wed Apr 06, 2022 11:39 Post subject: |
|
|
Unless you are using the type of towing frame that V8 rick used, as shown in my photo on page one and the Youtube link, by Boxerbloke on page two, which leaves the wheels on the ground. _________________
Copyright is retained for all my photos. Please don't copy them without asking permission
Do not blindly go where the path may lead you. Go where there is no path and leave a trail that others may follow!
ルイス |
|
Back to top |
|
|
Deker
Joined: 08 Mar 2008 Posts: 3833 Location: Borehamwood
|
Posted: Wed Apr 06, 2022 18:25 Post subject: |
|
|
Lewis wrote: |
Stop thinking, your brain will go round in circles and tie you up in unravellable knots. |
- - - You know Andy likes to talk N type
Mr D |
|
Back to top |
|
|
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Wed Apr 06, 2022 21:06 Post subject: |
|
|
Fostlongstrider: On a two axled trailer (as opposed to close coupled, twin axle), the front axle pivots/steers to follow the tow vehicle, with a rigid A frame tow bar, like a dolly. So if the towed vehicle 'front wheels are fastened securely to the dolly, how does the dolly steer in relation to the towed vehicle? A car's front axle doesn't steer around a single, central pivot to allow this. _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
annek
Joined: 06 Jul 2006 Posts: 613 Location: Brighton, East Sussex
|
Posted: Thu Apr 07, 2022 1:22 Post subject: |
|
|
I thought we'd agreed that it behaved like a caravan would, and pivots around the tow point? so its just the two rear wheels following, like any trailer would? that an A frame differs from a dolly in that respect. where the A frame needs the front wheels to do the steering behind the fixed point of the a frame.
I'm still trying to work out why it couldn't travel backwards on a dolly, providing front wheel lock was on. |
|
Back to top |
|
|
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Thu Apr 07, 2022 9:45 Post subject: |
|
|
Sorry, I'm all out on this. Trailers typically have two wheels on the ground. A vehicle on a dolly makes four wheels being towed on the ground, two vehicle wheels plus two dolly wheels. There has to be articulation between the dolly and the rear wheels. _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
Fostlongstrider Lifetime member
Joined: 03 Mar 2008 Posts: 2590 Location: Hedon, East Yorks
|
Posted: Thu Apr 07, 2022 10:57 Post subject: |
|
|
The Dolly doesn’t have wheels on the ground.Only the towed vehicle wheels.
The Dolly has the front wheels of the vehicle being towed secured to it but raises them off the ground. Have a look at some recovery vehicles and you will see what I mean. There is a mechanism on the Dolly which does this.
On a two axle trailer( not the double wheeled ones) the front wheels pivot and so does the connection to the towing vehicle.
In the Army we towed a generator trailer with a four tonner, the trailer tow bar had an eye which went on the hook of the four tonner and pivoted. The front axle of the trailer pivoted about the axle centre line and the rear axle was fixed.
It was okay going forward and the trailer followed the four tonner much the same as the baggage trailers at an airport follow the tow truck.
But having two pivot points the trailer was very difficult to reverse!. _________________ Ian.
All the best from the East Riding of Yorkshire.
'93 L300 Super Exceed Corse Gray over Grace Silver.Auto.
Flying Brick Supporter. |
|
Back to top |
|
|
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Thu Apr 07, 2022 16:24 Post subject: |
|
|
Found the answer! The plate that the towed vehicle is fastened to has a central pivot and lubrication between it and the bearing plate which is fixed rigidly to the dolly chassis/or axle. So it DOES articulate like a double axled trailer. I'm sure I had seen dollies with no such articulation/pivot, and couldn't understand how you turned a corner without massive tyre scrub on the dolly wheels! _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
Fostlongstrider Lifetime member
Joined: 03 Mar 2008 Posts: 2590 Location: Hedon, East Yorks
|
Posted: Sat Apr 09, 2022 10:51 Post subject: |
|
|
Hopefully this can now be put to bed. _________________ Ian.
All the best from the East Riding of Yorkshire.
'93 L300 Super Exceed Corse Gray over Grace Silver.Auto.
Flying Brick Supporter. |
|
Back to top |
|
|
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Sun Apr 10, 2022 17:42 Post subject: |
|
|
Sorry, I just hate not understanding how something actually works. Unless it is electronic, in which case it is just black magic in a box (but not the chocolate kind!) _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
Fostlongstrider Lifetime member
Joined: 03 Mar 2008 Posts: 2590 Location: Hedon, East Yorks
|
Posted: Mon Apr 11, 2022 10:34 Post subject: |
|
|
It’s okay Andy it comes with age😁!.
See you at the Overland.
Tom tells me they are having a Caravan/ Camper show in July as well as the September show.
ATB
Ian. _________________ Ian.
All the best from the East Riding of Yorkshire.
'93 L300 Super Exceed Corse Gray over Grace Silver.Auto.
Flying Brick Supporter. |
|
Back to top |
|
|
annek
Joined: 06 Jul 2006 Posts: 613 Location: Brighton, East Sussex
|
Posted: Wed May 04, 2022 17:44 Post subject: |
|
|
uh!
so I now get where you are coming from, as I was also only thinking of a dolly as something that held the vehicles front wheels, I don't have the image of a double axled dolly, but understand the crossed wires now!
...whats the overlander? |
|
Back to top |
|
|
Lewis Site Admin
Joined: 25 May 2006 Posts: 16299 Location: Huddersfield
|
Posted: Wed May 11, 2022 11:07 Post subject: |
|
|
Several Overlander posts resulting from the two posts above moved to Events forum Here:-
http://www.MDOCUK.co.uk/forums/viewtopic.php?t=51291 _________________
Copyright is retained for all my photos. Please don't copy them without asking permission
Do not blindly go where the path may lead you. Go where there is no path and leave a trail that others may follow!
ルイス |
|
Back to top |
|
|
andyman
Joined: 08 Dec 2012 Posts: 5602 Location: Penrith
|
Posted: Wed May 11, 2022 14:25 Post subject: |
|
|
Thanks, and well done, Lewis _________________ Andy C L300 Super Exceed - over 100 smiles per gallon! |
|
Back to top |
|
|
Fostlongstrider Lifetime member
Joined: 03 Mar 2008 Posts: 2590 Location: Hedon, East Yorks
|
Posted: Thu May 12, 2022 10:42 Post subject: |
|
|
Thanks. _________________ Ian.
All the best from the East Riding of Yorkshire.
'93 L300 Super Exceed Corse Gray over Grace Silver.Auto.
Flying Brick Supporter. |
|
Back to top |
|
|
|