filthy boy
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Posts posted by filthy boy
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Just a question on this, What if my bussines is motorway maintainance then i will be miles from home and on land i dont own?
Then the off road event would have to be motorway maintenance work and a genuine part of your job. The onus would be on you to prove this if you had an accident miles from home and killed someone. Anything else would be in breach of the terms under which the vehicle is registered.
If your job / business is contract work with plant then you are at your place of work so it is acceptable.
And you may well have to trailer any vehicles if the distance is significant although this is less clear.
Tim
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Lost me here on this bit!
Radius arm suspension with a panhard rod is set up with the drag link geometry to match the panhard as close as possible. This means as the axle moves up and down in a sideways arc prescribed by the panhard, any change in distance between the steering box and steering arm on the knuckle is minimised. This means that the drag link is not trying to turn the wheel as the axle moves relatively to the chassis ( axle moving up or down or the body rolling).
If the drag link and panhard are way out of line (like on a lot of lifted vehicles) then any relative movement between axle and chassis / steering box results in the drag link pushing or pulling on the steering knuckle. This is why drag link and panhard should be as close to parallel and the same length as possible.
As the amount of travel increases the problem can get worse.
On a triangulated 4 link the axle moves straight up and down with no sideways arc (because there is no panhard to pivot around). In fact you cannot run a panhard with a 4 link because it will bind. If you have a drag link mechanical steering link then as there is relative movement between axle and steering box this will generate steering input. We deliberately set our buggy up like this so we could pass SVA.
So a major advantage of full hydraulic steering is no linkages so no bump steer caused by steering linkages. You will still get some steer induced by body roll but this is dependent upon the axle links, not any steering links.
Hope this makes sense and explains what I said before.
Tim
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Just had to comment on the AGRICULTURAL VEHICLE REG.
This form of registration of vehicle is limited so that the vehicle can ONLY be used on the public road to go between the primary building (farmhouse or whatever) and the land upon which the vehicle is working. The rules actually state a maximum permitted distance.
So unless the event is on your own land or very close to your house and you are in the agricultural or forestry business then your vehicle is NOT road legal when you turn up at an event on someone else's land and a decent distance from your house.
This is fact and law. Argue all you want but it's the law. You can object and say it's stupid but you will still be breaking the law.
And we have gone through SVA and worked with the DFT so this is not based on a chat down the pub.
And hydraulic does give you an advantage, you can turn the wheels when with normal PS you would not stand a chance. Plus, if you run lots of articulation without a panhard then it is the only way to eliminate body / roll / bump steer unless you get into complex linkages or axle mounted racks.
Tim (Filthy Boy)
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My new hideout.
1650 sq ft. Beautiful estate in a great village.
And a fantastic pub just down the road.
Moving the beer fridge in this weekend. Just on the lookout for a sofa and armchair.
New frame arrives in a couple of weeks, then the build starts!
Tim
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found it it was done by filthy boy
That's mine pm me if you want to chat.
Or call, my number is on the website.
Tim
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what failures have you had ?
clutch packs, one way clutches, gear sets ?
Morning Dave
Would be interesting to get the HP and torque figures for the BMW 850 V12 as that used the ZF 4HP24.
Mind you, for all I know they may have a terrible record for eating boxes.
Tim
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can i ask why you want to know?
You certainly can.
We are going to be making bell housings to mate an LS V8 to a ZF 4HP 24 (uprated internals!) box. It's better than using an adaptor plate.
So you can have small block chevy power and an easily available / fixable auto box that will mate to the LT230 giving you full time 4wd with a centre locking diff. Sounds good to me!
Tim
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Thanks everyone, that's been helpful.
Tim
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As it says, trying to find out what vehicles (not just LR) did the ZF 4HP24 come in?
Help appreciated
Tim
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Absolutely - arms will be a little on the HD side
WIll
Any ideas how you will get your system perfectly balanced? If there is any "mismatch" between the valve / ram / steering box you will get a feedback loop going with each component trying to correct to a different version of straight ahead. The Sweet type remote servo is more commonly used with rack and pinion where this problem seems not to arise.
ALso worth looking at Woodward steering in the US.
Tim
PS the box doesn't actually fly the Atlantic 3 times, there is a way round that
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We have a SPAL on the buggy after the Pacet packed up, mind you it was pretty old and had suffered.
The SPAL is very low profile and great if you have packaging issues.
Tim
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Actually {in Ali-G voice} that wasnt a roll it was just on its side
Fancy a go in the new Buggy in Ireland this year ??? Its only going to have 450hp & be around 700kg lighter
700kg lihgter??? You not driving it then?
Tim
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Art Carr or Winters.
Tim
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Dave
Give me a call about the oiling.
Tim
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Dave
What are you doing for the high pinion oiling issues?
Tim
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International 2.8, stage 2 ZF 4HP24 from Ashcroft, TC from a 4.6 (thats the only V8 bit you need!), LT 230 (best thing LR ever made).
Done.
Tim
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It also looks to add in a lot of new failure points and additional stresses and loads from the elevated mounting of the upper part of the arm.
Now if you could work out how to get upper links on a 4 link past the oil pump on a Td5 that would be cool!
Tim
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If they are US dot marked to the equivalent standard (vehicle weight, speed etc) then they are compliant with C&U, can pass SVA and are fully road legal.
Sorry, can't remember the paragraph number before someone asks
Tim
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To be road legal and therefore have valid insurance it most likely will need to be SVA'd
Tim
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aha- i think i recall that being mentioned by a few people now!
perfect-i'll send him an email. does anyone know a rough price?
also, is there an "under one roof" shop similar to scorpian that dosnt do what they do! im fed up of having to have a sub folder in my favourites as long as my arm for land rover products!
You can now get these ready drilled for Staun beadlocks.
PM me with size and finish required and I will get you a price for Standard or drilled tomorrow. Chris is in France.
Tim
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I think it is ok this way, The idea is not new, and I went for it, having seen several rangerovers and defenders competing in the dakar rally using it and finishing. There is a logic to the diameter of the holes, in that the cross sectional area stays the same throughout the length of the arm. And as you say the centre does have very little effect on bending stress. They have seen some serious abuse for over 5 years. I havent done any stress analysis, maybe filthyboy can tell us more....
Daan
Daan
We only looked at the standard part (when we were attempting to make hinged radius arms work) but I think you are absolutely correct when you say the holes are in the right place to not adversely affect the part.
We will soon be doing the stress and FE analysis on our new frame. Send me the CAD drawing of your radius arm and I will put it through at the same time
Just kidding!
Tim
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Just to clarify. Do the 2 shoulder straps need to be attached to the frame at 2 separate points? Is a single 7/16" threaded bush welded through the cage tube with a a single rated eye bolt not considered adequate?
Tim
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The OE one is just about perfect material and design wise for the job it does.
The fabricated ones are just materially and structurally nowhere near as good.
Tim
PS Interesting to imagine how everyone would have reacted had the component in question been orange
Offroad Trading Ltd
in International Forum
Posted
It's recently set up by Chris to do retail. He has been around for quite a few years in wholesale and distribution.
So he's a wholesaler now doing retail (Marlow, IBS, Frontrunner, Outback Import etc.).
We have dealt with him lots for Staun stuff. Give him a call.
Tim