At the next Sacred Craft it would be interesting to have a “Rocker off” in addition to the “Shape off”. It would be cool to see the different measuring methods and what the spread is among the shapers… Might not be feasible though-cuz Dave Parmenter says you can’t measure rocker!
plotting rocker with numbers
is a tough go.I just made a rocker stick
with masonite and a
piece of pine 1x4
transcribed rocker with a
sharpie clamped to a spacer
nex to cut it out
and check the blank.
maybe cut out the stringer
and make a new one
to get the rocker tits on.
…ambrose…
and the magician who was
a great shaper,reached into his boxers
and shaped a woodie
and then there are spherical rockers, which Stretch is currently a devotee of: http://kyleberube.com/surfing/stretch-interview/
So, already been blah blah about what works for me as a front froot surfer…only two years ago, was on HI for a 4 month work gig from March - June, and towards end of April when the North Shore started dropping out, needed a quiver filler for spring eastside and early season south’s…looked around, picked up an 8’0 Trueline mini longboard/hybrid out of a shop that just looked…interesting… like the third off the rack board I’ve bought in 40 years…
That board just rocked my world…funnest damn board, super loose, fast as hell, rode it in waves from mellow chest high to well overhead and pitching…liked it so much, brought it back home with me instead of offloading it with the rest of the quiver…
Once home, put it on the stands, got out the 8’ level…4"’ nose rocker, 3.25" tail rocker, distributed almost spherical, single to double with the trifin cluster an 1" further back then I usually ride…totally different then the “front foot” rocker I ride in the rest of the quiver, and I do have to drive this board from the back seat…
but damn, is it hella fun…and just another reminder that you just never know…
yep, ark rockers are good. been on to them for 15 years.
Thats what I have based almost every board around.
…take a look at the project 15 DHD. looks to me (personally) its got a radius ark of 20 ft. That coupled with the late tight curve in the tail outline, make it work quite Ok…But thats just what I see.
Great thread here. Have learnt alot. One question. When measuring rocker on a shorter wider Flatter board that are in vogue at the moment do you adjust rocker measurements to make them lower to suit or do you adjust your entry point forward to say 8 inches instead of 12 and run a standard shortboard measurement because essentially with alot of these boards you are cutting 4 inches of nose off and adding volume to accommodate.
For example if I was to make a dumpster diver that was to be 4 inches shorter than my hpsb would I lower my hpsb entry rocker from say 1.5’ to 1.25’ at 12 inches … Or… Would I slide my rocker forward 4 inches and aim for 1.5’ at 8 inches?
You get the same result, but essentially on shorter boards your entry is going to be closer to the nose so it might make sense to measure your entry rocker there rather than say it has lower entry rocker at a point that isn’t the true entry.
Ok I’m rambling now and I’m only a 6 board newbie.
[quote="$1"] ....because essentially with alot of these boards you are cutting 4 inches of nose off and adding volume to accommodate. For example if I was to make a dumpster diver that was to be 4 inches shorter than my hpsb would I lower my hpsb entry rocker from say 1.5' to 1.25' at 12 inches ... Or... Would I slide my rocker forward 4 inches and aim for 1.5' at 8 inches? ... [/quote]
You can invent whatever rocker design system that makes sense to you and allows you to compare boards. However something to consider is:
If whatever system you come up with involves placing the rocker stick anywhere other than the mid point then you will have great difficulty communicating that system with anyone else when comparing measurements.
The standard is always to place the rocker stick at a tangent to the mid point of the board - however you have got me thinking about mid point measured over the curve Vs straight line - there will be a slight difference there with over the curve mid pointed shifted forward a bit on most boards which have more nose rocker than tail rocker and the various 1' points will be shifted a bit too and the resulting rocker measurements.
I don't think over the curve Vs straight line has been standardised, but the results either way at least give an idea of the rocker situation for a shortboard.
eg. Claude and myself discussed this on my [url=http://www2.swaylocks.com/forums/dynocore-premium-build]dynocore HPSB thread[/url] and according to boardCAD rocker for this board at the 1' nose point varies by only 0.07" and the 1' tail rocker measurement by even less at 0.01 when it is changed from straight line to over the curve.
One thing which I have noticed is that the term "entry rocker" was used mainly by the marketing description on the various commercial offerings, but to me at least meant absolutely nothing because no one has standardised where entry was - recently on Swaylocks various members (including myself) conveniently choose 1' as the entry on a HPSB and this does help us communicate with each other.
The other problem with a marketing description of entry rocker is that what is high and what is low is an individual judgement - if I remember correctly my Bushman Pancho Sullivan board was described as having high entry - but I personally class it as medium