New Posts New Posts RSS Feed: Tales from aFarr
  FAQ FAQ  Forum Search   Register Register  Login Login

Tales from aFarr

 Post Reply Post Reply Page  <1 89101112>
Author
iGRF View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 07 Mar 11
Location: Hythe
Online Status: Online
Posts: 5436
Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 18 at 3:58pm
Originally posted by Fatboi

Are you lifting the board when reaching?


No, not especially, it's raked. I lift it when I'm racing on deep legs, but no I tend to leave plates down until they become really noisy, but thinking about it that could have set a vortex going which transferred to the back foil it was quite bouncy in the short chop.
Back to Top
davidyacht View Drop Down
Really should get out more
Really should get out more


Joined: 29 Mar 05
Online Status: Offline
Posts: 835
Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 18 at 10:07pm
Could fit a fence to the top of the rudder blade to reduce aeration/cavitation, or maybe have a look at the area at the air/water interface to see if there is anything that might allow air to get drawn down the rudder blade that might cause cavitation ... flat leading edge or submerged rudder stock spring to mind.  Also a poor (flat) airfoil section might lead to stall.

And smile when you see a camera
Somewhere between lies and truth lies the truth
Back to Top
craiggo View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 01 Apr 04
Location: United Kingdom
Online Status: Offline
Posts: 1787
Post Options Post Options   Quote craiggo Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 18 at 10:13pm
Sounds like not keeping the boat flat as a gust hits.

I can imagine with the Farr hull shape that it will overpower the rudder pretty quickly when heeled, spinning up into wind and throwing you into the middle of the boat especially if you are trapezing high.

Keep it very flat by quick steering and quick easing of the sheet.
Buy a heel gauge (like a spirit level) as used on Oppies and learn to sail the boat bolt upright.
OK 2071
RS200 411
Back to Top
Do Different View Drop Down
Really should get out more
Really should get out more


Joined: 26 Jan 12
Location: North
Online Status: Offline
Posts: 971
Post Options Post Options   Quote Do Different Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 18 at 10:45pm
Rudder hung off a gantry, any side effects?

You right at the back pressing the gantry into the water causing turbulence?

If you are wiring that far back you are loading the rudder pretty heavily; maybe in your fun n games you got a bit too much heel on causing weather helm and a momentary heavy correction was simply a load too far resulting in stall.

edit, sorry Craig......, got distracted mid two finger typing. yes what I was thinking.



Edited by Do Different - 16 Jul 18 at 10:48pm
Back to Top
Fatboi View Drop Down
Posting king
Posting king


Joined: 09 Aug 16
Location: Hampshire
Online Status: Offline
Posts: 129
Post Options Post Options   Quote Fatboi Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 18 at 8:44am
Originally posted by iGRF

Originally posted by Fatboi

Are you lifting the board when reaching?


No, not especially, it's raked. I lift it when I'm racing on deep legs, but no I tend to leave plates down until they become really noisy, but thinking about it that could have set a vortex going which transferred to the back foil it was quite bouncy in the short chop.

Try giving it a lift, will help when the gusts hit as the boat will have less drag underneath and start 'skipping' a little more. The board is pretty key in most boats offwind planing and most people leave it down too much thinking that it will make it all more stable. 
Back to Top
Sam.Spoons View Drop Down
Really should get out more
Really should get out more


Joined: 07 Mar 12
Location: Manchester UK
Online Status: Offline
Posts: 2012
Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 18 at 9:42am
I was always taught to lift the CB off wind (Oppi, Heron, Enterprise and OK), around halfway on a reach and right up on a run, I was never taught it increased stability, actually just the opposite, the foil causes instability off wind as the boat can trip over it. In the Spice I set it for the conditions and leave it, too much else to do to faff around with the DB but the boat is uncontrollable with it fully up (even if that was possible without it getting in the way of the kicker and preventing you tacking or gybing). On the Blaze, I have upwind and off-wind positions, upwind varies depending on wind strength from fully down to about 15% back, off-wind is about 50%. Likewise the boat is un-sailable with it right up.

Edited by Sam.Spoons - 17 Jul 18 at 11:42am
Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"
Back to Top
Noah View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 29 Dec 04
Location: United Kingdom
Online Status: Offline
Posts: 518
Post Options Post Options   Quote Noah Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 18 at 11:06am
Me likewise Sam. Half board approx when three-sail reaching prevents the boat tripping over the board in a gust. It slips sideways instead. Beware the inadvertent board-up through either not enough friction or hitting e.g. jellyfish though. Result is crew in the water and a likely capsize to windward (embarrassing in 20kts!).
when running we have the board mostly up (75-80%) & kicker off. If the boat gets unstable a bit more board & a touch of kicker will stabilise it.
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: Online
Posts: 5436
Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 18 at 11:53am
Originally posted by Do Different


Rudder hung off a gantry, any side effects?


Was top of my thoughts..

It was quite broad and I was in the rear strap, the other suggestions heel etc do occur on tighter reaches and with the onset of a cross on, weather bow wave, especially if I ease the front foot to try and take the wave with the v of the hull rather than have it slam, it can then be a bitch to get bore off again. But it wasn't like that, it was a break out, there's something else it could have been, there are lots of jelly fish about, when i got back I'd been stung (which could have happened at the waters edge) but when they used to impact windsurf boards they can break the back out, so it could also have been that, slammed by a Portuguese Man O War!
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: Online
Posts: 5436
Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 23 Aug 18 at 8:26pm
Well the adventure continues, I've had a couple of bad breaks, basically my trapeze wires which were a fabrication of my own device have failed a couple of times with me out on the wire and i've finally given in to reason and sheathed separate lines anyway that's not the news. The news is tonight, I got a 2nd, mainly because it was bloody windy to start with and only a few of us got out, but it was about as windy as we ever race in so I'm quite chuffed with myself for getting round with only the one capsize and that was a stupid one on the bear off where i hadn't dumped the kicker, mistakes do get amplified when the winds up. It was fair bucking about tonight almost getting airborne on the upwind leg into the waves. Best result I've ever had in a breeze, still can't get near the Contender yet, but I screwed up the start being over early and having a very dodgy re round. No doubt about it though this boat is made for a breeze, just wish I could find a way to get it to work in light weather.

Edited by iGRF - 23 Aug 18 at 8:28pm
Back to Top
Jack Sparrow View Drop Down
Really should get out more
Really should get out more
Avatar

Joined: 08 Feb 05
Location: United Kingdom
Online Status: Offline
Posts: 2900
Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 24 Aug 18 at 10:15am


Back to Top
 Post Reply Post Reply Page  <1 89101112>

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