Author Topic: The fun of unlimited boards  (Read 47851 times)

SUPflorida

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Re: The fun of unlimited boards
« Reply #120 on: May 23, 2016, 09:39:16 AM »
Ponobill what you describe as a switch blade is exactly what I had in mind. If it could be instantly retractable to volley between having the extra tracking in a beam wind/paddling into a strong head wind on the quarter....and being able to go to conventional rear fixed fin only...where would be the liability? Did you or Mark try it in conjunction with a fixed rear fin? or only with a rear rudder? Curious if you guys skipped right over that possibility in pursuit of a fully steerable concept....

UKRiverSurfers

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Re: The fun of unlimited boards
« Reply #121 on: May 23, 2016, 11:03:35 AM »
I think we agree. There have been successful SUPs with rounded(ish) hulls like the K15 and some of the NSP DC boards. And even one of my own 12-6s has a (fairly mildly) rounded hull (C4 Switchblade). You are right that you can learn to use and admire the handling characteristics - to a certain extent, and they can be fast, for sure. But as I say, to list people they feel a bit tippy for their width and a lot of people are obsessed with going as narrow as they can, so trying to sell boards that roll a bit is not always going to be easy. What sells is not necessarily what is the most effective.

K15's got a 'shallow arch' with 'tumblehome'  ;D
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UKRiverSurfers

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Re: The fun of unlimited boards
« Reply #122 on: May 23, 2016, 11:05:49 AM »
A 'round bottom' is actually round, or semi circular anyway.

Like a rowing singe skull.
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Area 10

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Re: The fun of unlimited boards
« Reply #123 on: May 23, 2016, 11:32:29 AM »
Jeez, I said "rounded" not "round" and could have said convex or a range of other things. Everyone will know exactly what I mean if I say "rounded" as opposed to eg. flat or concave, and no-one will think I'm trying to be clever by using fancy words that send everyone rushing to Google.

Anyone thinking that they could usefully SUP any hull that even remotely approached a true semi-circle is out of their mind.

UKRiverSurfers

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Re: The fun of unlimited boards
« Reply #124 on: May 23, 2016, 11:46:06 AM »
No seriously though, theres a fair bit of difference.

Look at a single skull... It has exactly the same radious all through its profile and will have absolutely zero initial stability, and absolutely zero secondary stability too. It will just capsize without the ours aiding balance. It will get some stability when it gets moving though.. It is the lack of primary and secondary stability that makes it so fast..

A shallow arch will have a different radius at different points which add either primary or secondary stability....Tumblehome for example. The word even describes the action :)
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photofr

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Re: The fun of unlimited boards
« Reply #125 on: May 23, 2016, 12:44:04 PM »
I just saw someone posting something like:
"Rudders do not do jack for you when paddling upwind, or side wind".

It was said with such certainty, that, NEXT, we'll hear the same person say:
Surfskis do not really exist and even if they did, they never would be able to travel upwind or side wind with a rudder, because rudders do not do jack for a surfski.

I know... I know... you can't see me... but statements based on omitting what we already have that already works are just OUTRAGEOUS.
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Area 10

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Re: The fun of unlimited boards
« Reply #126 on: May 23, 2016, 01:03:16 PM »
Oh fer chrissakes -we've done this one to death. Let's move on.

PonoBill

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Re: The fun of unlimited boards
« Reply #127 on: May 23, 2016, 01:04:07 PM »
Ponobill what you describe as a switch blade is exactly what I had in mind. If it could be instantly retractable to volley between having the extra tracking in a beam wind/paddling into a strong head wind on the quarter....and being able to go to conventional rear fixed fin only...where would be the liability? Did you or Mark try it in conjunction with a fixed rear fin? or only with a rear rudder? Curious if you guys skipped right over that possibility in pursuit of a fully steerable concept....

I dont know what mark did with the thing. Hes almost as easily distracted as i am. I suspect though that he came to a similat conclusion as i did. That for rough water and given our primary interest in downwind that ventral fins and daggerboards arent worth the effort.
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UKRiverSurfers

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Re: The fun of unlimited boards
« Reply #128 on: May 23, 2016, 01:23:02 PM »
Oh fer chrissakes -we've done this one to death. Let's move on.

I was just gonna post..... Lets rename this thread "The fun of Unlimited Threads"

 ::) ;D ;D
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PaddleSpot

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Re: The fun of unlimited boards
« Reply #129 on: May 23, 2016, 11:11:16 PM »
Ponobill what you describe as a switch blade is exactly what I had in mind. If it could be instantly retractable to volley between having the extra tracking in a beam wind/paddling into a strong head wind on the quarter....and being able to go to conventional rear fixed fin only...where would be the liability?


Something like that ?


Olivier Drut
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PaddleSpot

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Re: The fun of unlimited boards
« Reply #130 on: May 23, 2016, 11:36:59 PM »
On this downwing video, hail storm, 45 knots gusts, the DW beginner that I am had little tracking problems, until I decided to try the daggerboard, around 0:55

at 1.30 I can actually steer the board using the paddle IN THE AIR, at about 30° left or right.

At 1:50 I stand up, the board is tracking perfectly. Of course you don't chase bumps with the daggerboard, but you can choose a direction and keep it effortless.

The board is a regular f-one 14'x29", fixed fin, no rudder, I just added this little daggerboard.


« Last Edit: May 23, 2016, 11:48:33 PM by PaddleSpot »
Olivier Drut
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Re: The fun of unlimited boards
« Reply #131 on: May 23, 2016, 11:39:13 PM »
Anyway, like in DW, it's too late to turn back  ;D

Olivier Drut
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PaddleSpot

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Re: The fun of unlimited boards
« Reply #132 on: June 04, 2016, 10:57:56 PM »
Work in progress  :D

Olivier Drut
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TallDude

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Re: The fun of unlimited boards
« Reply #133 on: June 05, 2016, 12:30:48 PM »
This looks familiar. Here's mine 18' UL when I was cooking the hot coat.   
It's not overhead to me!
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Ichabod Spoonbill

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Re: The fun of unlimited boards
« Reply #134 on: June 05, 2016, 07:15:23 PM »
I love the daggerboard. Great addition.
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