Here’s some pics of a template im modifying for an all round thruster ( knee to half OH, but mostly head and under ).
From around 12’’ from the tail, to 12’’ in front of my back foot, the outline is fairly straight. What effects will this have on the board??, as in, will it cause problems with the board "holding’ in the face, or stop it from turning??
Oh, and the ‘‘hip’’ from the tail back is supposed to be there!.
That is the same tail as a js I am fixing at the moment. Luke Egan used to ride the same tail.
…I dont see a smooth curve (line) there mate…anyway,
straight in front of the hip= more projection, less small radius of attack
Here’s a bump wing squash with a pretty straight segment at the back foot. Perhaps it can be a good reference for you.
Kind regards,
Steve Coletta
Looks like a standard bump squash that I’ve seen on a lot of Merrick’s, Rusty’s, JS’s and Parmenter’s. I believe it’s a pretty well tested design feature.
Both of these have the bump squash tail:
Thanks for the replies guys, i won’t be rushing out to change anything then. I want to try a shortboard, but i am no ripper for sure. And this board is going to turn much sharper than my twin keel, surely, with a 13’’ nose x 20-2 x 15 7’8’’ tail. Reverb, this will be board number 4, and im working on my templating. Next time, i will be drawing plot points every 6’', as i draw them to scale on graph paper, but only mark the wp, and nose and tail, and then join up with my long bendy stick. It seemed to work ok on my fish, but i think i’ll have to start plotting more reference points.
Thanks once again for the replies people.
Cheers
P.S Luke egan hey??, funny, we share the same surname. Never met the bloke, and i’d love to say i share the same surfing gene, but, alas, no, i musta got the dregs hahahaha
Lance, Definitely a well tested concept for outlines. Personally it’s not my favorite. I prefer thumb tails with no bump in my “everyday short board.” I use the bump wing idea on very short boards, usually the smallest boards in anybody’s quiver. It allows me to provide them with extra surface area in the back / tail half of their outline, then reduce the surface area aft for a little more “control” without too much curve in the last 12 to 18." The straighter line behind the bump maintains sufficient “projection” out of turns when riding a very short board in gutless - marginal conditions. I try to make the bump as subtle as possible. Al’s bump wing is pretty significant by comparison. Your links illustrate that pretty well. I’m sure most shapers are trying to achieve the same results when they design this kind of outline.
Kind regards,
Steve Coletta
Steve, im referring to the part of the template in front of the bump. It just looks to me that it doesnt have a lot of curve, it seems fairly straight. From 12’’ back, that doesnt worry me, i want to keep the wide tail ( 15 7/8 ), but not too wide a tailblock ( 5’’ ), so i get the benefits of a wide tail in small/gutless waves, but with a bit more manouverability. I was keen on a wide round tail, but the template is an existing one im modifying.
Cheers
…yes Beerfan, is like I comment before
so with that type of outline you obtain projection and a pivot point (hip)
Mark, Have a look at this one. I drew this one to the dimensions you had in mind - 15 7/8" @ 12" with a 5 1/2" tail block. It has quite a bit more curve in from the wide point to the bump. The inside (gray) line is the previous outline …
Kind regards,
Steve
Thanks reverb, more projection sounds good to me. I can put up with a lesser angle of attack as i aint no kelly or mick!!, and coming from a twin keel, it will turn a lot sharper than that im guessing.
Thanks for that steve. I dont really want to make another template up, as i’ve run out at the moment. I had that temp there so i just modified it. Nice curves though. Which software is that??