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So the variations of Streaker development |
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iGRF
Really should get out more Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6496 |
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Topic: So the variations of Streaker development Posted: 07 Feb 18 at 9:42pm |
Thought it better to start a separate thread, it could be interesting to talk about the different brands in the development of the Streaker, rather than it being buried in the Nat18 thread, story so far being a particularly quick in iffy conditions Streaker from Boatyards at Beer, it's number 1958 so I guess fairly recent, a nice little boat giving us in our Solutions a hard time which really it shouldn't.
So, somebody said something about the positioning of a buoyancy tank, can't see why that should make any difference but it certainly appears to sit higher in the water then the other Streakers of which there are a few at the Redoubt. Streakers have been sailed here since the dawn of time. I know there are tolerances and different layouts, some give you more legroom than others, that much I gleaned from a conversation at last years dinghy show talking to somebody about the Butler Boats model v another from a different builder. So that's about the gist of it, what more does the hive mind know? |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 07 Feb 18 at 10:04pm |
Picture your Minisprint, when you move across boat back of boat sinks, increase buoyancy and it won't sink, probably sit higher too.
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craiggo
Really should get out more Joined: 01 Apr 04 Location: United Kingdom Online Status: Offline Posts: 1810 |
Post Options Quote Reply Posted: 07 Feb 18 at 11:45pm |
I think a physics lesson is needed!
Bouyancy tanks/bags have absolutely no effect on how a boat sits on the water unless you allow water to come over the decks. A tank or bag simply stops water filling that volume of the boat. Changes in buoyancy tank position are largely ergonomic, or to reduce amount of water scooped up in a capsize. The only thing that will change the waterline is immersed shape of the hull and weight. Due to boats like the streaker originally being designed for homebuild in ply the tolerances are massive. The same can be seen in Solos where different designs are visibly different hull shapes. As has been said on the other thread I imagine they have gone for an extreme hull shape and it's down to weight, whereas the old ply boats knocking about may have taken on a few kgs over the years. |
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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: 08 Feb 18 at 6:52am |
Same can be said of many OD home build classes including those already mentioned the Fireball and Phantom have both had hulls 'optimised' within the tolerances to make the best hull shape (according to the person who did the optimisation).
The Solos have several hull shapes, some of which are reputed to be better inland, some better on the sea (the Winder Mk1 or 1a seems to be the favoured shape for people at Hunts). |
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Paul
---------------------- D-Zero GBR 74 |
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Paramedic
Really should get out more Joined: 27 Jan 06 Location: United Kingdom Online Status: Offline Posts: 929 |
Post Options Quote Reply Posted: 08 Feb 18 at 8:38am |
The Streaker falls into the same category as the Phantom in that modern materials mean that you can now build a boat thats stiff and down to weight. Previously they could probably have one or the other.
Also the weight in the ends of the hull can be reduced without compromise. The boat will now float differently to a wooden one (And no comparison at all to a single skin GRP example!!), and pitch noticably less - and this does make a difference inland too. If they have also added volume to the bow section towards the extreme of the permitted tolerance that will change how the boat floats too. All of this is within the rules, though it does effectively divide the class. Similar changes, plus carbon rigs transformed the Phantom into a class that people actually wanted to sail. Its only going to make a Streaker faster too, and i'd suggest that sailed well by someone the right size in optimum conditions it will punch well above its perceived weight. The 5 point PY reduction for 2017 bears this out. Vs a Solution, they aren't too dissimilar and given that the three people I know who had a Solution were all disappointed with it and bought something else very quickly I'm not surprised that the Streaker performs to a similar level if well sailed. The Streaker is significantly lighter, but has significantly less sail area - maybe a more efficient combination?
Edited by Paramedic - 08 Feb 18 at 8:41am |
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Sam.Spoons
Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3398 |
Post Options Quote Reply Posted: 08 Feb 18 at 9:23am |
Gut feeling, Streaker at 48kg, hard to build stiff and down to weight until modern materials came along so older boats all weight 53-55 kg. That's a difference of 10-12%. By the time you add a rig and a crew that % is at least halved. Should be easy to confirm though as they will all have been measured/weighed.
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seasailor
Newbie Joined: 07 Feb 12 Location: Hove Online Status: Offline Posts: 30 |
Post Options Quote Reply Posted: 08 Feb 18 at 10:55am |
Will it have been measured though?
I'm sure I overheard a bloke down the pub saying it hadn't been.
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iGRF
Really should get out more Joined: 07 Mar 11 Location: Hythe Online Status: Offline Posts: 6496 |
Post Options Quote Reply Posted: 08 Feb 18 at 11:09am |
Er... I realise an internal buoyancy tank makes no difference unless of course it's positioning affects the external shape and overall volume of the boat which clearly this model does. I also know changes have been made to the rear end of the Streaker, notably by Rooster, which looked quite tasty a few seasons back at the Dinghy Show.
One day they'll spot it's a lightweights boat it should have a carbon rig, they can't possibly use the 'it'll make older boats obsolete' excuse with all this other stuff going on, so I guess it's just the usually impecunious nature of the beast preventing complete modernisation. I was just wondering if anyone actually knew the difference of that tank positioning compared to say where it is on a Butler or Rooster boat. Edited by iGRF - 08 Feb 18 at 11:10am |
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2547
Really should get out more Joined: 11 Aug 11 Online Status: Offline Posts: 1151 |
Post Options Quote Reply Posted: 08 Feb 18 at 11:13am |
I thought you said it sat higher due to bubbles in the foam ....snigger ....
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L123456
Really should get out more Joined: 30 Apr 12 Online Status: Offline Posts: 500 |
Post Options Quote Reply Posted: 08 Feb 18 at 11:16am |
Eureka ...
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