myiW Current Conditions and Forecasts Community Forums Windsurfing Videos Buy and Sell Services
 
Hi guest · myAccount · Log in
 SearchSearch   ProfileProfile   Log in to check your private messagesLog in to check your private messages   RegisterRegister 
New Kona longboard
Goto page Previous  1, 2, 3, 4, 5  Next
 
Post new topic   Reply to topic    iWindsurf Community Forum Index -> Windsurfing Discussion
View previous topic :: View next topic  
Author Message
Sailboarder



Joined: 10 Apr 2011
Posts: 443

PostPosted: Thu May 02, 2013 9:03 pm    Post subject: Reply with quote

My Kona is stable when planing. I assume it is something with your technique.

The only time the board ejected me was when I managed to plane with the daggerboard down. The board turned on it's side and shoot me up!

You might be experiencing tailwalking when you are going very fast. For me it has to be on very flat water, with a 7.5, maybe 25kts gusts and the 46 cm fin. You are then overfinned and the board starts to swerve since you don't put enough weight to counteract the fin lift. If you then open the sail, the mast pressure is reduced and the nose will go up. The Kona step tail always prevented me from falling back when I did that mistake. I never fell from this, but I can't get out of it without loosing the plane. Now, when if I feel this coming, I'll turn upwind before it starts to swerve around.

The easy cure is to change to a properly sized fin, a 40 for me.

Hope this help!

Yan

Another video, not too exciting though:
http://vimeo.com/65318890
Back to top
View user's profile Send private message
nodak



Joined: 13 Nov 2012
Posts: 94

PostPosted: Thu May 02, 2013 10:35 pm    Post subject: Reply with quote

I need to get more fins for my Kone One. I only have the 46cm stock fin and try making it work with 5.0-8.5 sails.
Back to top
View user's profile Send private message
jingebritsen



Joined: 21 Aug 2002
Posts: 2439

PostPosted: Fri May 03, 2013 1:05 am    Post subject: Reply with quote

the first container of kona ones came with a 41 cm fin. i thought it was the perfect one for it. steve g. thought it was small for light winds. i had no such issue. would go as small as 32 cm for really high winds.

nodak, are you using the foot straps? i've played about with these boards a ton. if one is really lit and steps way too far back, the board will do as you describe as well. so, too much fin, dagger self deploy or ill use, or one steps way too far aft. those are the ways to get the board to behave such.

_________________
www.aerotechsails.com
www.exocet-original.com
www.iwindsurf.com
http://www.epicgearusa.com/
http://powerexmasts.com/?page_id=72
Back to top
View user's profile Send private message
nodak



Joined: 13 Nov 2012
Posts: 94

PostPosted: Fri May 03, 2013 11:53 am    Post subject: Reply with quote

In 20mph+ wind I can only use the front foot strap on Kona One. The rear foot strap is difficult to reach. I'd rig it with a 5.0-6.0 Retro or similar. According to James Douglas' calculator, the fin ought to be between 34-37cm. You say I can use less. I use the stock 46cm and get overfinned, hydroplane out of control, etc.

Your observations are right on about standing too far back on this board in high wind conditions. Someone with a physics background could describe the workings of forces on such a long board.

Look forward to getting the pricing back from Steve Gottlieb sometime this month on Kona Carbon.
Back to top
View user's profile Send private message
scargo



Joined: 19 May 2007
Posts: 268

PostPosted: Fri May 03, 2013 4:05 pm    Post subject: Reply with quote

Besus that looks like a sweet board. I have the original One, but if I happen to have a moment of weakness this summer, she may have a new friend.
Back to top
View user's profile Send private message
Sailboarder



Joined: 10 Apr 2011
Posts: 443

PostPosted: Fri May 03, 2013 4:17 pm    Post subject: Reply with quote

I recommend you get from Steve the 40 Kona fin. It is class legal and a good step from the 46.

In higher winds with a 6.0 and a 46, the footstrap are hard to use because the board wants to turn upwind. You feel better in front of the straps, at least it goes straight. You need the smaller fin. But still, in 20kts, with my 6.0 and 40, the back foot wants to stay in front of the straps. Since I don't have a smaller fin, there are still 3 solutions. 1-Higher boom 2-Mast base back 3-Both straps forward, A mixture of the 3 seems to work.

Finally, I have a background in physics but it is long to explain. You can start with Jim Drake explanation that you will find on JoeWindsurfer blog. One day, I would like to build on his explanation to first understand well, and then explain the effects of tuning.

Hope this helps

Yan
Back to top
View user's profile Send private message
noshuzbluz



Joined: 18 May 2000
Posts: 776

PostPosted: Fri May 03, 2013 6:38 pm    Post subject: Reply with quote

This might be somewhat of a threadjack and I apologize for that but I had a surprising result when I put my new 7.5 Cheetah on my rrd LongRider (350/70) a couple of weeks ago which is the redheaded stepchild of the Kona One from what I've read. I got the 7.5 specifically for low wind/long board days. The specs on the website say 7.5 is at the top of its range for this board (2009-2010? Year 13) which I didn't know let alone think about. Hell, I thought I could put a 10.0 on this board with no worries. Anyway, got it out and powered up and as soon as I raked the sail back and got my foot in the back strap and pressured the fin I rounded up and everything got all funky. The straps are one setting from being all the way out. I was totally caught off guard since I've had a blast with this board/fin (stock MFC 34) with a 6.5. At first I thought it was the daggerboard slipping down and creating havoc so I took it out. Come to find out that was the base was too far back. I ended up moving it all the way up I could and still could have used another 2 inches or so to get balanced. It was doable but disappointing. In hindsight I could have used less DH/OH on the sail to get the COE more forward which would have helped a lot but really, I didn't think it would be so critical for such a big board. So why is it these modern boards have such short mast tracks? I've seen more adjustability in some fin boxes!?
EDIT: I do realize that I need a bigger fin for this sail but it wouldn't have acted like it did had I more adjustment to move the up base up. The CEO was clearly behind the fin, not just under finned.

_________________
The Time a Person Spends Windsurfing is not Deducted from their Lifespan...
http://www.openocean.com
Back to top
View user's profile Send private message
jingebritsen



Joined: 21 Aug 2002
Posts: 2439

PostPosted: Fri May 03, 2013 7:21 pm    Post subject: Reply with quote

not getting to the back strap is actually from having the boom too low? how is that true? not seeing is all about guessing, but most people that can't feel comfortable in the back strap and front only usually can't sheet home. as the mast is raked back, the boom lowers relative to the sailor as one moves back. if the boom is too low, mast foot pressure becomes harder to achieve. then one sheets out, and MFP leverage gets worse yet.

is the boom too low or base too far forward? explore your solutions by trial and error. worx for either kona one or rrd long rider. these boards force folks to find easy. once applied, they are really fun.

_________________
www.aerotechsails.com
www.exocet-original.com
www.iwindsurf.com
http://www.epicgearusa.com/
http://powerexmasts.com/?page_id=72
Back to top
View user's profile Send private message
noshuzbluz



Joined: 18 May 2000
Posts: 776

PostPosted: Fri May 03, 2013 8:51 pm    Post subject: Reply with quote

jingebritsen wrote:
not getting to the back strap is actually from having the boom too low? how is that true? not seeing is all about guessing, but most people that can't feel comfortable in the back strap and front only usually can't sheet home. as the mast is raked back, the boom lowers relative to the sailor as one moves back. if the boom is too low, mast foot pressure becomes harder to achieve. then one sheets out, and MFP leverage gets worse yet.

is the boom too low or base too far forward? explore your solutions by trial and error. worx for either kona one or rrd long rider. these boards force folks to find easy. once applied, they are really fun.


jingebritsen
I'm not sure if your reply was directed at me as much as it was Sailboarder because of the boom reference but yes a higher boom would have helped now that I think about it. I'm sure coachg will tell me the same next time I see him. Probably should have run that one but him to begin with. Sure is nice to have a great source of knowledge here AND in person! But still wondering why a bigger board would have such a limited amount of adjustment.

_________________
The Time a Person Spends Windsurfing is not Deducted from their Lifespan...
http://www.openocean.com
Back to top
View user's profile Send private message
DanWeiss



Joined: 24 Jun 2008
Posts: 1961
Location: Connecticut, USA

PostPosted: Sat May 04, 2013 8:46 pm    Post subject: Reply with quote

Guys, this comes from my own racing experience on the Kona One, also confirmed by Joachim Larsson of Kona One AB, the brand owner.

If the nose is riding high and all else is in tune, lower the boom. As well, a sliding harness hook actually makes finding that fore-aft balance a lot easier.

Finally, not to pimp the brand too much, but the Kona racing harness is designed for longboard racing and long harness lines. The pull from the harness lines follows a line right down to the bottom of your hips. Most racing harnesses don't do this and direct the power more to the rear and upper hips. In found the Kona harness work a lot better than any other harness I own for Kona racing.

_________________
Support Your Sport. Join US Windsurfing!
www.USWindsurfing.org

www.konaone.com
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    iWindsurf Community Forum Index -> Windsurfing Discussion All times are GMT - 5 Hours
Goto page Previous  1, 2, 3, 4, 5  Next
Page 4 of 5

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum

myiW | Weather | Community | Membership | Support | Log in
like us on facebook
© Copyright 1999-2007 WeatherFlow, Inc Contact Us Ad Marketplace

Powered by phpBB © 2001, 2005 phpBB Group