Trailer control. Myth or reality??

Submitted: Thursday, Aug 17, 2006 at 19:15
ThreadID: 36869 Views:3682 Replies:7 FollowUps:4
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Hey all,

I heard a long time ago that to have the best control over your trailer (single axle)then the distance between its axle and the towing vehicles rear axle should be the same as the vehicles wheelbase.

I'm not sure of the theory, but I can imagine if you were set up as mentioned and were drving over some corrugations and picking the best speed for reduced vibration, then the vibrations in the vehicle would be the same as those on the trailer so it would be one less thing to worry about.

Does anyone know if this is true or not?

Has anyone ever set up such a configuration or are they readily available?

Cheers

Looking for adventure.
In whatever comes our way.



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Reply By: Member - Roachie (SA) - Thursday, Aug 17, 2006 at 19:57

Thursday, Aug 17, 2006 at 19:57
Sounds like bollocks to me, I'm sorry to say!!!!

Only theory I have is that reversing a trailer is much easier if the trailer axle/s is a greater distance from the back axle of the vehicle than the wheel base of the truck.
AnswerID: 189553

Reply By: Willem - Thursday, Aug 17, 2006 at 20:05

Thursday, Aug 17, 2006 at 20:05
Equinox

I haven't checked my set up exactly but it comes close. In fact the trailer(rear axle to trailer axle) is maybe a tad longer that the trucks wheel base.

My trailer tracks very well, running at a slight forward tilt. On severe corrugations I drop the tyre pressure down to 10psi with the trailer weighing in fully loaded at 800kg. I must add that it is a bush trailer and not a camper. I have done a springover on it and run 265/75/16's, the same as the truck.

I have had not problems with the trailer at all.

Cheers

AnswerID: 189554

Follow Up By: Member - bushfix - Friday, Aug 18, 2006 at 08:20

Friday, Aug 18, 2006 at 08:20
G'day Willem,

that trailer certainly is holding up well for you. I remember when you started looking for one, you would be pleased with what you have put together no doubt, it is good when things just work for you like that.

btw, how did the painting side of things go?

kind regards,

Jeremy.
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FollowupID: 447078

Follow Up By: Willem - Friday, Aug 18, 2006 at 15:42

Friday, Aug 18, 2006 at 15:42
G'day Jeremy

Yep, I am happy with the trailer. I will be making somemodifications to it to be able to incorporate all our kitchen stuff as well. At the moment it carries the three tents, fold up table, 2 camp mats, 2 sleeping bags, 2 small gas bottles, hi liftjack, jockey wheel, 2 x 5lt oil containers, trolley jack, 20 x 2olt water containers and 12 jerrycans.

The artist did 12 watercolour paintings during the course of the holiday and feels quite pleased with herself :-)

Regards
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FollowupID: 447141

Follow Up By: Member - Pedro the One (QLD) - Sunday, Aug 20, 2006 at 01:04

Sunday, Aug 20, 2006 at 01:04
Hi, Willem ..................

By "spring-over" ... am I correct in assuming you've mounted the springs on top of the axle ??? Which is what I have already done [gave me the extra clearance needed and saved expensive replacing of the guards.] ........... pleased to know that I have followed in your hallowed wheel-steps !!
Also run 31 x 10.5 x 15, similar to my Troopy ....... but I would have been loth to lower them to 10 psi's ....... until I read your comments.

As this is my first time with a trailer behind [other than a boat trailer] I wasa comfortable with around 20 psi ............... the corrugations up here [Cape York Peninsula] sometimes get pretty fierce and it will be interesting to see [and feel !] the results of a much lower pressure.

I am currently doing the same with my trailer as you appear to have done, [I can't afford a camper trailer set-up yet,] ...... but have oodles of tried and true camping gear ............. don't really NEED a camper trailer .. just a want, as I am now much closer to 70 than to 60 and my comfort needs have increased over the years.

I am just taking the leap into the next phase of my goals which is gold prospecting/detecting and the camper trailer avenue will give me the few more creature comforts ....... to allow me to spend several days in the hills with some bare essentials.

Always very interested in yours and others posts/lifestyle ..............and learned heaps from the experienced and diverse contributors to this forum. Such a wealth of information and ideas to draw on ....... ay!!

Whilst I have been a camper more than forty years ...... I still peek into others camps/vehicles to see how they do things better than me ......... and then
borrow/steal their best bits !!!
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FollowupID: 447329

Follow Up By: Willem - Sunday, Aug 20, 2006 at 08:35

Sunday, Aug 20, 2006 at 08:35
Hi Pedro

Yes, springs mounted on top of axle. I am still considering fitting shock absorbers as well but do not want to overkill the accessories...:-) I made sure that when I bought my trailer it had the same wheel width as the Nissan. It tracks very well over any surface. I fitted a TREG multiswivel hitch and to date have had the trailer at extreme angles behind me without a problem. My only bugbear with a trailer is reversing it on tracks orin the bush. I am forever wanting to go back to see something I have missed along the way. Doing a U-turn is not always possible.

I have no need for a camper trailer. As with your sentiments the CT's are terribly overpriced for what they are and heavy to tow as well.

I am in a similar age bracket and yes, it is nice to have better comfort....:-)

My gold detector at this stage it is but a dream.....................

Cheers
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FollowupID: 447340

Reply By: Ray Bates - Thursday, Aug 17, 2006 at 20:38

Thursday, Aug 17, 2006 at 20:38
Hi I have had three trailers over the years and one each one I have extended the draw bar by 18" . It works quite well. I got the idea from road trains
AnswerID: 189566

Reply By: Mark- Thursday, Aug 17, 2006 at 21:22

Thursday, Aug 17, 2006 at 21:22
Longer drawbars = a very good thing, both for stability and for ease of reversing.
Thats why a boat trailer is generally a lot easier to reverse than say a box trailer as the axle is a long way back on the frame.

I dont think there's any magic formula in relation to towing vehicles wheelbase, longer wheel base is going to more stable and less influenced by forces the trailer exerts, also the weight of the towing vehicle in relation to the trailer is relevant.
AnswerID: 189574

Reply By: Brid from Cost Effective Maintenance - Friday, Aug 18, 2006 at 08:04

Friday, Aug 18, 2006 at 08:04
I couldn't comment on the wheel base relationship as you put it, but if a trailer scampers about sideways due to corrugations, the longer the trailer wheelbase is, the smaller the angle it moves sideways, and hence the more stable it is.

The same scamper in a shorter wheelbase means a much larger angle of deviation, with the same trailer weight exerting greater sideways pull on the tow vehicle.

Obviously too long a wheelbase is unacceptable.

Regards
AnswerID: 189608

Reply By: equinox - Friday, Aug 18, 2006 at 19:31

Friday, Aug 18, 2006 at 19:31
Thanks for your answers people.

There doesn't seem to be any grounding in the theory, though it seems the consensus is that having a long draw bar is not a bad thing.

Cheers

Looking for adventure.
In whatever comes our way.



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AnswerID: 189696

Reply By: angler - Friday, Aug 18, 2006 at 22:35

Friday, Aug 18, 2006 at 22:35
I always believed that the trailer wheel track or width of the axle should be the same as the tow vehicle. This stops it from wandering on dirt roads. I agree with the longer tow bar, much easier to reverse.
Pooley
AnswerID: 189729

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