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Old 04 January 2004, 15:29   #11
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Quote:
Originally posted by RIVA
yes just a little knoelage
But not much literacy. Take some English lessons from that Icelandic chap. Two out of ten you naughty boy.
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Old 04 January 2004, 15:50   #12
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Quote:
Originally posted by RIVA
THE ROUND NYLON BUSH MAKES IT ROUND that fits in the roller as you will know nylon on aliminium alowes in built material lubrication for designd less friction.
Yes and that's exactly where the flaw is, it's a theoretically plausible idea that doesn't stand up because the axle takes up a large proportion of the inner diameter of the roller. In turn this compromises the length of the split pin over the retaining washer The washer then rides over the split pin and introduced the oh so cleverly designed aluminium axle into my hull during the recovery process.

Again out of interest do you not think a round aluminium axle with a round nylon bush would do a better job.

Your maintenace schedule seems OK but 3 sets of bearings per year seem a little excessive ?

The storing with the drums off is definitely a valid point, thanks for that
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Old 04 January 2004, 16:08   #13
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on the english sorry small condition called dilecsea , look @ the ally propperly it has rounded edges the reson they pop of is usually 2 things 1 driving boat on in a current were it screws roller over pin this is very comon but never is admited to as every owner thinks they can drive a boat on very hard skill realy the other is not set up right in the first place , if you look closley only the top of the shaft is in contact with the ally thus pecentage wise less surface contact in side , which i think is what you ment you will also notice its not round so is stronger than putting a hole through round bar wich weekons the round bar but not formed ally
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Old 04 January 2004, 17:38   #14
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Quote:
Originally posted by Richard B
But not much literacy. Take some English lessons from that Icelandic chap. Two out of ten you naughty boy.
Richard you can't win or lose a technical argument by pointing out that someone can't type well. In my case it would be hypocritical!

Riva

I see your point, but where we launch from is quite sheltered from the current. It quite a way up the Itchen (Saxon Wharf) and its a shallow slipway so we have to approach quite slowly so we don't ground the Skeg.

Obviously, lateral forces are causing the problem in pushing off the rollers but those forces are also exerted normally when the boat is moving up the rollers, as the hull shape is spreading the rollers. Basically the problem is caused I think by the split pin being too short. I'll go and have a good look at it tomorrow and come back to you.

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Old 04 January 2004, 17:40   #15
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Wasn't arguing, just being.... awkward.

In fact - Sorry Riva - that was a bit (lot?) cruel of me.
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Old 04 January 2004, 18:02   #16
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Hi Rich

SI perhaps?

You weren't arguing I was, and not with you for a change!

Any way It's livened up a slow nite
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Old 04 January 2004, 18:17   #17
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Originally posted by Rogue Wave
SI perhaps?
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Old 04 January 2004, 18:42   #18
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The Whiteshooz syndrome (Stella Intolerance)
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Old 05 January 2004, 05:19   #19
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Have to agree with Rogue on this, the design of Indespension traliers leaves alot to be desired. Plated split pins and washers in Aluminum dipped in salt water is not a good recipie. Replacing the split pins is almost impossible, different hub sizes even on the same size of trailer ads confusion and means dealers don't stock the right size. And making brake shoes and springs out of mild steel for a boat trailer is astonishing, or good business practice as you can sell new brakes shoes every year for every trailer you make

Quote:
if you service right every dip no problem
hmm, there is no way you should have to take the hubs off after every dip, 3 times a year sounds better. From experience my bearing last 2 years with this and a set of bearing protectors.

Pete
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Old 05 January 2004, 10:33   #20
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Right then I have been down to the trailer and have had a look at the design and I still maintain it is Flawed.

The extrusion that forms the roller axle is Ovoid
The plate washer that retains the roller on the axle has a round hole
Where the round hole of the washer is placed over the ovoid shaped axle the split pin is inserted through the thinnest section of the axle
Behind the very short split pin you can see the Gap between the washer and the axle which fairly quiclky allows the split pin to be ridden over by the washer.

A friend has a new Ribtec which came with a new indispension trailer and that's got the same problem and they are beginning to go after about 10 launches

over
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