What are peoples thoughts on a double concave bottom in the tail for a surf SUP? or is it possible to go from a double concave to a v? What benefits and disadvantages would come from this? Just doing an assignment for uni and would like some thoughts.....

laceys lane said...

Adapt said...

What are peoples thoughts on a double concave bottom in the tail for a surf SUP? or is it possible to go from a double concave to a v? What benefits and disadvantages would come from this? Just doing an assignment for uni and would like some thoughts.....

dales 12'6 do. a lot of shortboards have doubles into a tail v. it's tricky to get the tail plane shape line and rocker blend right

I'm aware of this on a shortboard, but Lacey how do you think it would effect the performance of a surf SUP or do you think a flat bottom SUP is the way to go? I'm thinking of a board between 8'10-9'6 when talking about this style of bottom.

D J sounds like he knows what hes on about both my Dc8.8 and 8 .10 have the concaves and they rip
I would give Dale a call on the benfits

or if your down this way have a surf on one my Dcs the surf report for scotts head onlly 2ft clean waves just got back water temp 24%
there has been a sup explosion at scotts counted 6 today

Adapt said...

What are peoples thoughts on a double concave bottom in the tail for a surf SUP? or is it possible to go from a double concave to a v? What benefits and disadvantages would come from this? Just doing an assignment for uni and would like some thoughts.....

G'day Adapt
Check out the beginning of of this youtube video this is my High Performance Woody Jack SUP you will see the rocker + concave with low rails. Yes this SUP goes unreal I love this board (not for sale) I'll be back in Fiji in a couple of days can't wait to get back on my SUP. I've only had one surf on it since September last year. As I mist riding my short boards. Check out my new MR 1979 model Sigle Fin can't wait to surf it at Cloud Break or Wilks Pass

awesome video iron phil i always look forward to watching your videos

ODSUP said...

D J sounds like he knows what hes on about both my Dc8.8 and 8 .10 have the concaves and they rip
I would give Dale a call on the benfits

or if your down this way have a surf on one my Dcs the surf report for scotts head onlly 2ft clean waves just got back water temp 24%
there has been a sup explosion at scotts counted 6 today

Dales bottom shapes work pretty well from 8.0 to 10.0 single to flat to deep spiral V

from today DC 8.0

laceys lane said...

ODSUP said...

D J sounds like he knows what hes on about both my Dc8.8 and 8 .10 have the concaves and they rip
I would give Dale a call on the benfits

or if your down this way have a surf on one my Dcs the surf report for scotts head onlly 2ft clean waves just got back water temp 24%
there has been a sup explosion at scotts counted 6 today

most of dales surf sups have nose concave, flat in the middle going to reasonable doubles into v.
for a long time a lot of prroduction boards were lucky to have a nose concave.

i've noticed naish are now putting a lot more into the bottoms of their boards, they seem to put a lot of effort into upgrading their boards every year which is great to see
cheers

I'm a fan of Dales race and surf boards, the only problem I have with the design is the volume as I'm not that light even for a weedy looking guy.

I think the question was what are the benifits of concave/vee throughout the hull of a surfcraft.Basically concave gives lift which creates speed and vee sucks to the face and gives the craft extra rail to rail manouverability.To test this get a table spoon and put it under a running tap you will notice that the concave side skipps out of the water where as the convex (vee) side sucks right into the running water.So whare to put what?Concave under the rider for paddle speed and down the line wave speed.Vee under the riders back foot so the craft wants to stay stuck to the wave when turning and for rail to rail manouvering.Another thought especially concerning SUP,concave gets a craft floating on the rails which is quite stable where as vee will make a craft rock from the centre which is rather unstable.
Hope this helps.

Thanks gumballs that helps out a bucket load! now just the decision making process of what I would like the SUP design to be so I can present it to the lecturer with appropriate resource and justification

Adapt said...

so can anyone tell me where the doubles start and finish before turning into the v? as i mentioned earlier this is for an assignment and potential a board to be built one day.

The double usually blends from the centre and stretches towards the tail.
Initially the double concave will have the middle of the board and rails at the
same height but the rails will slightly turn to V as you get closer to the tail.
This will make the concaves blend to normal V.

Does this make sense?

Spiral V can make the board/tail super loose but a bit "floaty" meaning you loose some control when laying over a heavy turn at speed. IMO regular V through the tail works the best.