SR3 Upright "life" Part 2

SR3 Upright "life" Part 2

Author
Discussion

splitpin

2,740 posts

198 months

Sunday 9th September 2012
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Simon T said:
I use the hub tie down fittings, two at the front one at the rear (only cos I cant access the other one). Been using Them for years, never found the geometery moved a jot

S
That's because you know how much to give it (just enough and no more) and therefore don't overdo it Simon: I've actually seen some blokes using a long breaker bar to get extra leverage onto the strap ratchet tensioner; makes you wonder whether they think a Radical weighs about 1500kg as well as usually not having a handbrake.

BioBa

Original Poster:

317 posts

153 months

Sunday 9th September 2012
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Very interesting as I just started to us the hub tie down method a couple of month ago. I always feel uncomfortable putting preassure on to them. We used to simply put the slings around the rims.

Not tying down the front is fine during normal driving but could be very danderous when having to do an emergency brake (in particular in a turn) or having the trailer swing. Securing the car is mostly related to those situations and you certainly do not want the car coming off the trailer while trying to avoid an accident in the towing vehicle.

double d racing

306 posts

198 months

Tuesday 11th September 2012
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Following on from Stilling and Splinters ( or was it Splitpin ). .....
I've used the hub centres on every Radical/trailer I've had and no problems.
Its very easy to over tension using ratchet straps as its very easy to apply undue pressure. We nip up the front ones exactly the same, taking care not to slew one wheel v the other and then apply "all " the tension on the rear two wheels.
D D

splitpin

2,740 posts

198 months

Tuesday 11th September 2012
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Each to his own guys, but I was simply passing on what I was told was now (Spring of this year) Radical's way of doing it and I always think that 1) Radical have forgotten more than we will ever know and 2) that their experience is based on a lot more experience than all of us put together.

Other than their single rear wheel lashing that I am not comfortable with (for reasons previously stated i.e. the pivoting effect in the event of a hard stop), to me their one point tensioned both ways makes perfect sense; in effect they are hard securing the tie down insert itself and as we all know, there is 'float' between that insert and the centrelock stub; pull on that in one direction (as your method must David) and there must be a danger of introducing an uneven load/stress onto that stub; fair enough, 'just enough' tension means it is probably negligible/irrelevant, but equally a newbie could easily overcook it and as Steve has suggested apparently some have, some who apparently ought to know better.

And actually, I do cover BioBa's point: on a belts and braces basis, I do use a couple of 'assistor' scaffold boards wedged alongside the front wheels to make sure that 'come what may', the front does not skip sideways.

Extremeracer

41 posts

192 months

Tuesday 11th September 2012
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On one occasion Radical returned my SR4 on my trailer with the strapping simply engaged by placing the metal hooks over the lower rear wishbone outer ball joints (no under-tray at that time) which I thought ingenious but questionable.

radical78

398 posts

144 months

Thursday 13th September 2012
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those hubs were not broken tying on a trailer. either seized or badly fitted wheel bearings

BioBa

Original Poster:

317 posts

153 months

Thursday 13th September 2012
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Nothing seized and bearing works perfectly and looks like its seated perfectly. It was simply metal fatigue.

Ron V

85 posts

151 months

Thursday 13th September 2012
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If you look at where both hubs broke it is right at the "hinge" point, just inside the upright where the bearing meets the hub.

If the radical tie downs that go inside the hub do not fit almost perfectly, (and it has been mentioned that they do not by a fair margin) then the inner most part of the "tube" inside the hub is going to tension the top side of the hub, and in turn the outer most point of the tube is going to tension the bottom part of the hub. This will happen as soon as you start to lash the car. The tighter you go the more it will leverage the hub right at the point where they are breaking. i.e. the load is not displaced across the full inner diameter/length of the hub.

Simon knows how to use them as I am sure many others do. Fact remains that if used incorrectly more than x amount of times then this is a possible result.

Hope that made sense.

I would still love to know how the other car was tied down.

Edited by Ron V on Thursday 13th September 20:13

Count Johnny

715 posts

197 months

Friday 14th September 2012
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Crack testing is generally cheaper than replacing parts or crashing.

Simon T

2,136 posts

273 months

Friday 14th September 2012
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Count Johnny said:
Crack testing is generally cheaper than replacing parts or crashing.
spectating is even cheaper biggrin

splitpin

2,740 posts

198 months

Friday 14th September 2012
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Count Johnny said:
Crack testing is generally cheaper than replacing parts or crashing.
Anyone in particular in the UK that you'd recommend Iain?

Count Johnny

715 posts

197 months

Saturday 15th September 2012
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splitpin said:
Anyone in particular in the UK that you'd recommend Iain?
Sorry Trev, I'm afraid you're banned so I can't respond to you.

Ron V

85 posts

151 months

Saturday 15th September 2012
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Huh?

Count Johnny

715 posts

197 months

Saturday 15th September 2012
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Ron V said:
Huh?
Sorry, Ron. A little private 'joke' between me and Splithair.

If you happen to be in the Midlands, NDT Midlands are local but, TBH, there are lots around and - because they're usually involved in closely regulated stuff like aerospace - Google will find you a quality supplier.

Count Johnny

715 posts

197 months

Saturday 15th September 2012
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Simon T said:
spectating is even cheaper biggrin
One hundred thousand of your earthquids says you're wrong. smile

splitpin

2,740 posts

198 months

Saturday 15th September 2012
quotequote all
Count Johnny said:
splitpin said:
Anyone in particular in the UK that you'd recommend Iain?
Sorry Trev, I'm afraid you're banned so I can't respond to you.
Thanks for letting me know Iain, but really? If so, I've never heard anything like it; finding out an unpleasant thing from a third party on a sunny Saturday morning, something that one would have hoped that those responsible would have had the courtesy and/or the balls to let one know direct. Extraordinary!

Oh well, back to Item 7 of Life's Little Rules ........... 'Don't get angry, get even'.

Ron; the PJ continues ...........


Edited by splitpin on Saturday 15th September 12:52

Count Johnny

715 posts

197 months

Saturday 15th September 2012
quotequote all
splitpin said:
Thanks for letting me know Iain, but really? If so, I've never heard anything like it; finding out an unpleasant thing from a third party on a sunny Saturday morning, something that one would have hoped that those responsible would have had the courtesy and/or the balls to let one know direct. Extraordinary!
Yes, really!

I'm afraid we now live in a world where temperately expressed differing opinions are unwelcome to the extent that they are deleted and the author is banned. It's a bit like being suddenly excluded from email dialogues when you happen to disagree, isn't it? wink

Never mind whether I'm right, or wrong, such an act of censorship - countenanced by a director of said organisation - is truly shocking isn't it?

Ah well. Back to my well thumbed copy of Orwell's greatest work. wink

dunc_sx

1,608 posts

197 months

Saturday 15th September 2012
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Aaaaaanyway, I had a rear upright crack in an entirely different place (no specific impact) which would have definitely lead to failure also, I'll try to dig out a pic.

Dunc.

splitpin

2,740 posts

198 months

Saturday 15th September 2012
quotequote all
Count Johnny said:
I'm afraid we now live in a world where temperately expressed differing opinions are unwelcome to the extent that they are deleted and the author is banned. It's a bit like being suddenly excluded from email dialogues when you happen to disagree, isn't it?
That would never happen to me of course wink

Count Johnny said:
Ah well. Back to my well thumbed copy of Orwell's greatest work. wink
One could take a wild guess that you're not referring to Eric's other great work "The Road To Wigan Pier"

Count Johnny

715 posts

197 months

Saturday 15th September 2012
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splitpin said:
Count Johnny said:
That would never happen to me of course wink
Of course. wink

splitpin said:
One could take a wild guess that you're not referring to Eric's other great work "The Road To Wigan Pier"
No, it's the one about a dystopian future within which a totalitarian regime suppresses the truth and inconvenient news is shoved into memory holes.

Double think and all that. wink