…I look forward to seeing the next stages , then the finished product , then hearing how it surfs …I’m sure if you did pretty much all the shaping [by the sound of it !!] you may have trouble holding yourself back from riding it too, eh Lob ?
Glad to see you can also think in feet and inches as well as cms…
Well, it sure looks like it will be fun to ride ! [I’m sure you WILL , but please keep us updated !]
Wow lob!, very impressive. Overall I think you are onto something. If I could, I’d like to make a suggestion. You can run the contours up further into the board and allow them to arc the “other” way, ala the Venturi effect. That is, the runners and main contour are pointing to the nose… …well, follow the arc through to the point that the contours are pointing away from the nose.
We found they work best if they end about 40 inches up from the tail and the venturi contours should “neck down” just ahead of the front ventral fins. Depth should progress off the tail. Runnners can be shaped quite aggressively with no ill effects. It should work quite well “as is” in off-the-tail moves but the projection may suffer a little bit. Just my opinion…
"… You can run the contours up further into the board and allow them to arc the “other” way, ala the Venturi effect. That is, the runners and main contour are pointing to the nose… …well, follow the arc through to the point that the contours are pointing away from the nose.
We found they work best if they end about 40 inches up from the tail and the venturi contours should “neck down” just ahead of the front ventral fins. Depth should progress off the tail. Runnners can be shaped quite aggressively with no ill effects…"
… this is for you too, Shwuz , if you wanted to see the ‘Wilderness’ outline photo you posted earlier , as a bonzer, albeit the “3” version…
PlusOneShaper => Merci about those inputs… I’ll need to take a bit more time than usual to catch all the meaning of your technical speech - being french, it’s quite a bit tough to understand at first reading but I can catch it, thanks again.
More photos: Rocker and rails
Did you notice how impossible (almost) to picture rails ???
Wow lob!, very impressive. Overall I think you are onto something. If I could, I’d like to make a suggestion. You can run the contours up further into the board and allow them to arc the “other” way, ala the Venturi effect. That is, the runners and main contour are pointing to the nose… …well, follow the arc through to the point that the contours are pointing away from the nose.
We found they work best if they end about 40 inches up from the tail and the venturi contours should “neck down” just ahead of the front ventral fins. Depth should progress off the tail. Runnners can be shaped quite aggressively with no ill effects. It should work quite well “as is” in off-the-tail moves but the projection may suffer a little bit. Just my opinion…
I will try to break it down; please note that these findings are not absolute, they are just based upon testing of several different variants of the overall concept.
The Distance. The big concaves and the runners (the little ones outside of the main contours) could both run further up the board. These contours can go almost up to the wide point or even past it. Usually the concaves start about 40 inches from the tail.
The Venturi. (Refer to Chipfish61’s post above and you can check my website under “Special Projects”.) Notice the width of the contours; (the distance of the runners from the stringer). This distance is not constant. Specifically, the width is the least about 24 inches from the tail. The water is allowed to run faster and smoother through this area, and this is good (ie. dynamic lift). This lift area coincides with where you stand when pushing and turning the board. The rider almost “pivots” on this area and it is up to the shaper to tune the shape to the surfer, who may favor the front foot or the rear foot.
The Depth. All four contours seem to work best if they get deeper and deeper as they go toward the tail. The little runners can be quite deep as they exit off the rail (I’ve done as much as 5/8") and 1/2 inch (before glassing) is typical. The main contours are about the same depth as the runners, but they do not show this depth as much because they are wider and are distributed over more area.
Note: all this info is not the Final Answer on this concept, so take all this stuff as just one version. Lastly, this version works best with flexible ventral fins and a “boomerang” center fin.
The Depth. All four contours seem to work best if they get deeper and deeper as they go toward the tail. The little runners can be quite deep as they exit off the rail (I’ve done as much as 5/8") and 1/2 inch (before glassing) is typical. The main contours are about the same depth as the runners, but they do not show this depth as much because they are wider and are distributed over more area…
just to clarify , George…
when you use the term "runners , are you referring to the two side concaves in Lob’s board ?
I ask , because I thought the “runners” were actually the two [or four , in a "modern " bonzer5] side wedge shaped “fins”
You refer to them as ventrals yes , rather than bonzer “runners” ?
It was confusing to me as an aussie , so I wonder how much more for the europeans here at sways …semantics , I guess , but I just wonder if that clarifies it , in terms of fins and concaves , for Lob , Coque, Neira, Evilkid , and others