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Messages - Larry Allison

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1
Gear Talk / Re: Weed fin for JL Sidewinder
« on: July 06, 2020, 07:32:43 PM »
Can anyone recommend a better weed-shedding all-around fin for the Jimmy Lewis Sidewinder? The stock fin seems to have a good enough balance of tracking, stability, and maneuverability for my use, but it's AWFUL at shedding eelgrass and similar stringy seaweed. I've tried the SIC Weedless (7" ?) from my Bullet on the sidewinder, and that's much better at shedding the weeds, but it makes the sidewinder a bit tippier than I'm comfortable with.

I mainly race and tour this board in flatwater and coastal chop (quartering wind, reflected waves, etc), so I'm more interested in speed and stability than downwind/surfiness.

Thanks!

BS
Allison Dolphin Keel all the forward in the fin box at all times.

2
Talldude, You are right around 2013. Had a few interesting comments with Corran on Facebook and the forum. Got to give it to him he knows his boats, but not Paddleboards. He has crazy energy, like that guy. Hope you are well my friend.

3
Sorry been super busy at the new factory and short handed making fins. So I have to step in and foil along with some other tasks. Thank you Pono Bill for the kind word. Hi to Bean also and Luc.

As for a ventral fin on that Imagin, Imitation is a form of flattery and screw up. My friend that front box is at the balance point which will increase your yaw opposite effect. Better to ride that board with no Ventral fin because the placement of the front box is the same as a Windsurf Dagger fin to point higher. That placement will cause reaction that you will have to fight at any size fin. You could try a Stavron small Angry fin, but you will probably just get Angry, LOL!

Love to sell you a fin, but cant because poor fin Box Placement.

Thank you for the support my friends.

4
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 27, 2018, 04:01:25 PM »
Probably because the allstar is tippy and you the 4 fins to make it go fast and stable and did I guess that right?

Allstar is not a tippy board quite the opposite. Well, unless you are 225+ on 22.5"wide - then anything will be tippy.

Mostly 24.5 wide with a few 23.5 wide my friend. Mahalo

5
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 27, 2018, 01:49:22 PM »
Probably because the allstar is tippy and you the 4 fins to make it go fast and stable and did I guess that right?

Yes my friend, Mahalo

6
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 27, 2018, 09:31:39 AM »

7
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 10:08:55 PM »
Larry W. Allison
4 mins via Instagram
Here in Picture 3 and final post, the Twin Fins are set the same as a Surfboard would be used with the flat side facing in.

Notice the Twin Fin is vertical but look at the front Red Arrow pointing to the leading edge of the point of the fin facing inward which becomes reactive with water that now hits the outside of the front of the fin toward the the rail. Water moving from nose to tail will hit the outside acting like you are towing a Anchor even more then the Negative feel of CANTED fin position.

Hope these 3 pictures clear up any misunderstanding of the function of Allison Probox Race Twins which are again NOT LIKE A SURFBOARD.

Please feel free to ask any questions.

8
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 09:30:58 PM »
Larry W. Allison
5 mins via Instagram
 
Now here in Picture 2 I will explain and show you the negative effects of installing your Allison Race Twins the "WRONG" way compared to the "RIGHT" way in Picture 1.

The main thing to understand here in Picture 2 is how you see more of the inside of the Twin Fin. Along with notice the top of the Twin Fin how close it is to the rail line of the board tilted out (which is a term we call CANT). This is one of the biggest mistakes people make in understanding multiple fins being reactive.

What I mean by reactive is, looking at Picture number 1 with the Twin Fin in a Vertical position with the flat side out you hardly notice the fin in the picture. Then looking at Picture number 2 with the Twin Fins tilted (CANTED) out still with the flat side out you can clearly see alot of fin, which means water recognizes that also. Now your board feels like you are towing a Anchor.

This is also a great feature in using Probox Finsystems which allows you to set your fins in multiple tilts (CANT) to best preform in the right position by a patented interchangeable CANT insert.

In Picture 3 I will show and explain the same Probox Twin Fins in a Surfboard position which is even a more common mistake. This really kills the drive and glide of a Sup Board of any style.

9
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 08:06:11 PM »
Larry W. Allison
40 mins
Since the Explanation Videos about Allison Probox Race Twins a few weeks back by Paddlesurf Warehouse started. Then the results of Allison Probox Race Twin tests verses a Single Sup Fin from Doctor Bryce Dyer, PhD in Sports Technology / Senior Lecturer at Bournemouth University confirming what alot of us already learned and experienced in the last 8 years it has been crazy in LA's world. So I thought it's time to get in depth what goes on in a Probox Race Twin World with the overwhelming calls and emails from consumers and other board brands coming into market using the Allison Probox Race Twin Concept.

Here in picture 1: I created a lay-out diagram showing what I have learned that Allison Race Twins are doing. Using a Starboard All-star as a example.

First off notice looking down over the Rail Twin Fin that the rail side of the fin which is flat runs parallel to the center fin. This is so the fin does not interfere with the water flow coming from the nose to tail. The Twin Fins also creates a water snake that gives better release over a Single Fin on a Square tail board that sticks to the water.

Now looking at the inside of the Rail Twin Fin, notice the foil (curved inside surface) front edge where the Red Arrow is pointing. The front edge of the fin is piercing the water from a small point to back 40 percent to the widest point of a Quarter Inch thickness fin tapering off for release This preforms one of the tasks of the Twin Fins in directing water flow to the center of the Board's tail.

The other major task of the Twin Fin is that it stabilizes the board wobble from rail to rail especially in Narrow Higher Volume Boards and aids in bringing the board back to center instead of throwing the paddler off the board. Which is a most common event to happen to a Paddler from a balancing Act of riding A Single Fin.

Another task of the Twin Fin is taking the pivot point out of the tail which minimizes the zig zag effect ( yawing) and aids in better tracking which translates to faster speed. Along with a easier experience in pivot turns.

Keep following as I add more information about the function of Allison Probox Race Twins.

10
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 03:57:54 PM »
Hey Larry, have I been installing my boxes backwards? ;D ;D ;D

In this picture the same fin is put in like a SURFBOARD setup flat side in. Notice the Toe in front reacts with the water flow coming from nose to tail. This is all wrong in a Probox Race Twin World.

11
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 03:47:53 PM »
Hey Larry, have I been installing my boxes backwards? ;D ;D ;D

When you have "V" in the bottom or flat then screws are to the outside allowing the Probox inner changeable inserts to bring the fin Vertical like shown in this picture. Notice you see NO side of the fin looking down in this picture which is why water does not react to the flow from nose to tail.


12
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 03:43:58 PM »
Hey Larry, have I been installing my boxes backwards? ;D ;D ;D

Bean if the fin sets in a concave which is Rare in this case or on a flat then screws face the inside to allow the inner changeable Probox Cant bringing the fin vertical.

Notice you see more of side of the fin with the Cant in this picture, that is what water sees which slows you down. 

13
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 12:17:58 PM »
Same board showing Box placement from stock placement.

14
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 26, 2018, 12:13:42 PM »
Here is a recent conversion done from a Probox Tech Installer in Washington. Thought I would share the review from the owner of this board. THese are customers that seek me out when they want to better their water experience.


Marcus Chiu
Marcus Chiu Friends with Sup Race Fins and 5 others
I tried my new fin setup, first with the Dolphin Keel and Ventral, then ProBox twin and Ventral.
Dolphin Keel was better than stock fin for stability, but the ProBox twin was way more stable and tracked like it was in rails.
I felt more confident and was able to focus more on paddling than keeping my balance with a faster top speed.
I look forward to putting more time on the water with this new setup.
Thanks Sean Thomas / Echo Composite for the install.🤙

15
Gear Talk / Re: twin-fins-or-more-on-a-race-board/so it begins
« on: July 24, 2018, 10:35:50 AM »
All this debating cracks me up because it shows that most don't even know how a paddleboard moves thru water and what the function of a fin is and does, LOL but yet argue points that make no sense in the real world of Mother Nature. The last few days I have received some PMs from people sending me information about what some companies are posting about Fin Function and Performance on how to pick the right fin, LOL! Sometimes it's best not to say anything then posting Koolaid that the consumers are smarter then the Manufacturing sector.  I experienced the same in Windsurfing but yet the best riders in the world later rode my fins, proof is in the Pudding, LOL!

Thank you Ukgm, Ponobill, Bean, Luc, Burchas, Brodog and Stoneaxe to name a few that stepped up to Infinity and Beyond.

Thank you Ukgm for doing the work of showing what we simple people already experience. Yes since a year ago I have created a few new designs that increase the speed numbers more so because of the request from the consumers and some pros that are looking and now learning the advantage of multiple fins. Yes in simple terms, In the World of Standup riding a Single Fin which is a Pivot point along with a balancing act with a small range of reaction that tires you out. Or a multiple fin set-up which takes the balancing act out with a larger range of reaction and aiding in other aspects to better your water experience.

Yes it is a changing world for sure from 8 years ago since I started this push of multiple fins to now where the board designs scream Multiple fins even more so because the boards are higher on water putting the fin dynamics more in play from the boards of yesterday that were water subs that you almost didn't need a fin, LOL!

I am here to help people push their experience on the water which is my Passion which I am blessed to do myself. So if a old guy like me can ride a board 23 wide it tells you I am not a Travis Grant for sure but it's the equipment, lol!

 

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