New Posts New Posts RSS Feed: Wiki Sail by GRF
  FAQ FAQ  Forum Search   Register Register  Login Login

Wiki Sail by GRF

 Post Reply Post Reply Page  <1 678910 34>
Author
johnreekie1980 View Drop Down
Groupie
Groupie


Joined: 11 Jun 07
Online Status: Offline
Posts: 91
Post Options Post Options   Quote johnreekie1980 Quote  Post ReplyReply Direct Link To This Post Topic: Wiki Sail by GRF
    Posted: 27 Mar 13 at 1:31pm
Paul Goodison manages fine sailing his laser flat without the gunnels dragging in the water all the way up the beat. If iGRF spent as much time lookig inwards as he spends looking outwards then he would have figured out this sailing game a long time ago.
Back to Top
pondmonkey View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 12 Aug 11
Online Status: Offline
Posts: 2202
Post Options Post Options   Quote pondmonkey Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:36pm
Yay - chainsaw a laser, although just a fake one please; no need to chainsaw one that's paid its design royalties.
Back to Top
Daniel Holman View Drop Down
Really should get out more
Really should get out more


Joined: 17 Nov 08
Online Status: Offline
Posts: 997
Post Options Post Options   Quote Daniel Holman Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:41pm
Originally posted by iGRF

Originally posted by Daniel Holman

Another effect is squat - prob less significant on boards which are essentially flat,



Not quite



That flat.


So, tell me, there are these two boats, a stock Laser and my Laser which has been professionally cut in half and it's freeboard increased by a couple of inches, you have to race a series with some big money prizes at the end, are you going to ignore the big Laser? (Given it was altered by someone who could build down to weight rather than that last place you used to hang out at)


Pretty sure I'd qualified the flat statement in the buttock plane - both these examples especially the excocet are very flat in that respect. Both of these have almost boat like curvature in the section plane which is a lower wetted surface / lower form drag solution in pre planing and displacement speed ranges.

Yep if you found somebody who could add a foot of depth to the laser in a material that incurred no extra weight penalty, then I would still sail the original if my life depended on it. My CoG lower, less windage, identical flat water hydrodynamics/hydrostatics, less parasitic volume so less motions / added reisitance in waves, whats not to like?!
Back to Top
iGRF View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 07 Mar 11
Location: Hythe
Online Status: Offline
Posts: 6499
Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:42pm
It's not just that it floats higher, it's the dynamic reaction at all points of the extra volume. The resistance to heeling, the extra support for rig loads, in light weather the ability to roll heel and reduce wetted surface.

The laser has quite a flat bottom, making it bigger in those curved side walls would also be a benefit.

But whatever, we'll go round and round and disagree and it can't be proved either way until someone physically goes out and does it.

But you're all wrong just the same.
Back to Top
iGRF View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 07 Mar 11
Location: Hythe
Online Status: Offline
Posts: 6499
Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:44pm
I didn't say a foot I said a couple of inches...

Don't put words in there because you've lost the argument now
Back to Top
blaze720 View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 28 Sep 05
Location: United Kingdom
Online Status: Offline
Posts: 1635
Post Options Post Options   Quote blaze720 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:50pm
This thread was such a good idea ... for all sorts of reasons !!   LOL  Well done Scotsfinn is worth saying though .... !!

Edited by blaze720 - 27 Mar 13 at 1:51pm
Back to Top
AlexM View Drop Down
Really should get out more
Really should get out more


Joined: 10 Jan 06
Online Status: Offline
Posts: 857
Post Options Post Options   Quote AlexM Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 1:52pm
So if you kept adding a few more inches you'd float even higher?
you could keep adding the inches and then you've built a flying boat!
That's how that Wayfarer did it!!
Back to Top
fab100 View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 15 Mar 11
Online Status: Offline
Posts: 1005
Post Options Post Options   Quote fab100 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 2:11pm
Ah Alex, be careful - he's moved the goalposts. Without admitting that theory was complete nonsense, we've now moved to whether a laser with more freeboard but identical in every other way (ie with a free-lunch) would just be faster. Like it matters.

Its typical politician disassembly - when your stance on an issue is shown to be ridiculous, what you do is sneakily move the discussion on, claiming you were talking about something else all along, and hope no one notices.

Luckily, as its sailing (well peripherally) its far more interesting than politics. And tickling to see what rubbish comes from Kent next is certainly more entertaining than debunking Keynesian economics or endogenous growth theory or whatever it was
Back to Top
Medway Maniac View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 13 May 05
Location: United Kingdom
Online Status: Offline
Posts: 2788
Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 3:01pm
Originally posted by fab100

 And tickling to see what rubbish comes from Kent next 

Please qualify that: "East Kent", i.e. Men of Kent, not to be confused with the higher species, Kentish Men.

But you are right - a distinct shift in the goalposts.  We may consider the argument won.

What a disappointment though. There I was looking forward to telling my grand-children about the day I witnessed a discovery as great as Newton's with the apple.  Was all set up to take screenshots of my name next to Grumph's and everything.
Back to Top
shadeux View Drop Down
Groupie
Groupie
Avatar

Joined: 06 Feb 09
Location: United Kingdom
Online Status: Offline
Posts: 77
Post Options Post Options   Quote shadeux Quote  Post ReplyReply Direct Link To This Post Posted: 27 Mar 13 at 3:25pm
Originally posted by iGRF

Only one thing will resolve this issue..

Cut the Laser in half, add in the inches and see which goes faster.

Nothing of anything written here will convince me that the bigger of the two lasers will not out pace the smaller of the two around a race circuit under all but full planing conditions.
 
 
Eh? Surely if you cut it in half neither part will go very far.................or did I miss something 50 pages ago?  Why not just cut it in half and leave it at that?
Bruce
Shadow002
Back to Top
 Post Reply Post Reply Page  <1 678910 34>

Forum Jump Forum Permissions View Drop Down

Bulletin Board Software by Web Wiz Forums® version 9.665y
Copyright ©2001-2010 Web Wiz
Change your personal settings, or read our privacy policy