29er GBR 074 Tynemouth |
J24 (Sail No. 4239) Dartmouth |
Laurent Giles 'Jolly Boat' Exeter |
List classes of boat for sale |
Radial rake measurement |
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piglet
Really should get out more Joined: 04 Jan 07 Online Status: Offline Posts: 514 |
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Topic: Radial rake measurement Posted: 16 Jan 16 at 9:56pm |
I realise this is horses for courses and a bit subjective, but,
What's a good rake measurement using a straight radial bottom section? I've got 3425 to where the tape touches the top of the transom, half way round the radius. |
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JimC
Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6649 |
Post Options Quote Reply Posted: 16 Jan 16 at 10:10pm |
Isn't at least 3/4 of the point of having a Laser to not worry about that sort of nonsense?
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PeterG
Really should get out more Joined: 12 Jan 08 Location: United Kingdom Online Status: Offline Posts: 818 |
Post Options Quote Reply Posted: 17 Jan 16 at 9:24am |
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Peter
Ex Cont 707 Ex Laser 189635 DY 59 |
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rich96
Really should get out more Joined: 20 Jan 05 Online Status: Offline Posts: 596 |
Post Options Quote Reply Posted: 18 Jan 16 at 6:01am |
I'm sure that someone on the Laser forums will be able to give you an informative answer
The rake issue is not unusual in the Laser |
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jeffers
Really should get out more Joined: 29 Mar 04 Location: United Kingdom Online Status: Offline Posts: 3048 |
Post Options Quote Reply Posted: 18 Jan 16 at 9:41am |
If the build quality was consistent yes. It is much better now than it used to be. We had some boats at Hunts that had masts at very strange angles.
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Paul
---------------------- D-Zero GBR 74 |
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 18 Jan 16 at 10:23am |
Looking at the way the boat is sailed, I assume the more upright the mast is, the more kicker you can Wang on before the boom hits the deck?
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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piglet
Really should get out more Joined: 04 Jan 07 Online Status: Offline Posts: 514 |
Post Options Quote Reply Posted: 18 Jan 16 at 10:39am |
I have had 2 very different and very good Laser sailors tell me that they have both had boats with a slightly forward/upright pot, and that under certain conditions the boats seem to be quick if you can get it right.
I don't suppose for one minute I would be able to tell the difference but the reason for asking was that I was looking at buying a 'medium age' (16# ###) boat and I wanted to check it wasn't a friday afternoon boat.
I think most people would agree that LP have improved QA in recent years.
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andymck
Far too distracted from work Joined: 15 Dec 06 Location: Stamford Online Status: Offline Posts: 397 |
Post Options Quote Reply Posted: 18 Jan 16 at 11:26am |
The issue was not the pot. They are all the same. The issue was the deck bond. If you look at any boat that has the deck bonded in this way there will be a varying thickness all round the boat. The pot angle was set by the mold, but if there was a slight excess of bonding agent at the bow compared to the stern then there was a significant affect on the overall mast rake. This also means the measurement for rake needs to be taken to the bottom of the hull as the measurement to the deck should be fairly reproducible. I suspect no one noticed until it became an Olympic class.
Now they are aware what the issue is, it can be looked at in the process. I suspect it took a lot of working out what the issue was. |
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Andy Mck
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jeffers
Really should get out more Joined: 29 Mar 04 Location: United Kingdom Online Status: Offline Posts: 3048 |
Post Options Quote Reply Posted: 18 Jan 16 at 11:36am |
That and there is a bit of tolerance at the bottom of the pot that allows it is sit off centre (that is usually full of bonding paste) if it has not been put together perfectly.
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Paul
---------------------- D-Zero GBR 74 |
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Roger
Really should get out more Joined: 23 Mar 04 Location: Somerset Online Status: Offline Posts: 524 |
Post Options Quote Reply Posted: 18 Jan 16 at 2:11pm |
Back in the day..... 1980's I went to pick up a new Laser from Banbury.
There that day were a couple of hot shot, top of the fleet guys, they spent hours weighing hulls and checking the rake by putting their own chosen bottom section in the pot of what seemed like dozens of hulls, they very carefully chose the ones they wanted, can't remember how they checked the rake, but they did say there was big variation. I remember my boat was a 128*** number, which kind of dates the time. I of course just took the hull they gave me.... |
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