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Topic: alko+bulldog200q used together!!!!
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03/9/2009 at 7:12pm
Location: Outfit:
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I think we are singing from the same hymn sheet here old chap, just not sure we are singing the same verse of the hymn. As you say, a stabiliser cannot compensate for a poorly loaded unit. My concern is that a beginner may have a poorly loaded unit and because of the stabiliser, might not realise it is poorly loaded until it is too late.
I can honestly say that having a weight ratio of under 60% I barely notice the white van when it comes past, with or without the stabiliser. With my previous car, it was noticeable as was the presence of the stabiliser, which is not so noticeable on my current car.
By virtue of the fact I noticed the stabiliser on my previous car, I have to acknowledge that my previous setup was farther from perfect than my current setup (no outfit is 100% perfect). Even so, I still had a weight ration of around 75% so it was well under recommended guidelines.
To get back to the original topic, there can be no argument that to suggest anyone uses two stabilisers is at best advising them to waste money and at worst offering potentially dangerous advise if the question was being asked because the outfit was that unstable.
When you consider the price of ATC, at £399.50 against the price of an AlKo AKS 3004 at a RRP of £299 you have to say that the extra £100.50 is money well spent. For this reason, I question why anyone would recommend purchasing a stabiliser over saving the money towards fitting ATC.
I have never used ATC, but as an engineer, the system is clearly actively removing a snake rather than trying to muffle it.
If I compared a snake to a loud radio, a stabiliser stuffs cotton wool in your ears, ATC turns the volume down.
I think this pretty much tows the line with everyone elses opinion and shouldn't get anyones back up as it give an explaination of the statement and an alternative.
Of course, there are cheaper stabilisers around, but these are not as good as the AKS 3004, either due to having fewer friction pads or in the case of the leaf spring type the fact they need frequent readjusting and are a bit of a pain to fit.
If someone has £400 burning a hole in there pocket and is considering a stabiliser then this post does point out a far better alternative.
Out of interest, what are people's thoughts on using ATC and a stabiliser together? I won't annoy anyone on that subject as I have no practical experience with the ATC.
Post last edited on 03/09/2009 19:18:11
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08/9/2009 at 2:44pm
Location: Staffs Outfit: Swift Challenger 490 SEL & VW Tiguan
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Surely a stabiliser acts as a damper, much like a shock absorber, removing unwanted oscillations; & in this case the resonant frequency that builds up when the movement frequency of the caravan moving one way is close to or matches the frequency of the movement the other way. Consider forced vibrations in structures caused, primarily, by human input, ie: the millenium bridge, or wind induced like tacoma narrows etc. Here we have the natural resonant structural frequeny matching the inducing frequeny, & hence the frequeny increases & the structure would eventually fail. To remove the oscillations you need to change one of the natural resonant frequencies, & in this case the stabiliser is acting to change the frequency of the forces pulling the caravan to one side. Whether its correctly deemed a safety or comfort aid is another matter. Personally I prefer the blade type, as they reduce the for-aft movement, they are a bit more of a hassle to use but I feel it worth it. Our new caravan has an Alko but I'm keen to fit the blade also, however I'd probably try it with the friction pads slackened so that the Alko is damping side to side & the spring to dampen the up & down movement.
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08/9/2009 at 7:03pm
Location: Padded Cell Outfit: Calvin Klein Straitjacket & manacles
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"...Given that a stabiliser does take out minor oscillations but cannot dampen out major ones which we are all agreed on then there must be a point where the minor oscillation becomes a bigger one..."
- unless the minor oscillation has been "taken out".....so what has ceased to exist (taken out) then creates something from nothing...
Once again, UoB actual summary - "...has been shown to be very effective at smoothing down snaking oscillations and reducing settling time...."
The unproven suggestion persists that use of a stabiliser tends to give a false sense of security and encourages higher speeds.
If so, it is equally valid that safety belts, air cushions, ABS, ESP will also encourage a false sense of security and encourage higher speeds. Whether these devices work or not is irrelevant; the "sense of security" is a perception - do these - have these - devices encouraged higher speeds?
When crash helmets were made compulsory for motorcyclists, did they increase their speeds?
Is there proof of any higher speeds because these devices/accessories have become standard and/or compulsory, rather than the modern tendency to rush and hurry through every part of life?
Unfortunately, a few/some people may well consider that the mere prescence of these aids/accessories/devices do make higher speeds permissable, but the blanket assumption that the majority will do so is totally unwarranted - the fact that I have some fault or failing does not give me the right to assume, let alone suggest, that the majority of other people also have that particular fault.
Gram
------------- What's the difference between a chicken?
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08/9/2009 at 8:27pm
Location: lancs Outfit: bailey senator wyoming
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Quote: Originally posted by Gram on 08/9/2009
"...Given that a stabiliser does take out minor oscillations but cannot dampen out major ones which we are all agreed on then there must be a point where the minor oscillation becomes a bigger one..." - unless the minor oscillation has been "taken out".....so what has ceased to exist (taken out) then creates something from nothing... Once again, UoB actual summary - "...has been shown to be very effective at smoothing down snaking oscillations and reducing settling time...."
The unproven suggestion persists that use of a stabiliser tends to give a false sense of security and encourages higher speeds. If so, it is equally valid that safety belts, air cushions, ABS, ESP will also encourage a false sense of security and encourage higher speeds. Whether these devices work or not is irrelevant; the "sense of security" is a perception - do these - have these - devices encouraged higher speeds? When crash helmets were made compulsory for motorcyclists, did they increase their speeds? Is there proof of any higher speeds because these devices/accessories have become standard and/or compulsory, rather than the modern tendency to rush and hurry through every part of life? Unfortunately, a few/some people may well consider that the mere prescence of these aids/accessories/devices do make higher speeds permissable, but the blanket assumption that the majority will do so is totally unwarranted - the fact that I have some fault or failing does not give me the right to assume, let alone suggest, that the majority of other people also have that particular fault.
Gram
Absolutely well said. I'm with you all the way. It's just common sense
------------- ant
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