Author Topic: Jimmy Lewis taking about his construction vs. others..  (Read 7571 times)

Wetstuff

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Jimmy Lewis taking about his construction vs. others..
« on: April 30, 2016, 08:08:56 AM »


I have never pretended to be a materials engineering grad from MIT but I watched this and thought; "Wait a minute! ..the skin in isolation is 90% irrelevant in the water?!"  It seems to me his presentation only applies to point contact ..and/or would still only be somewhat supportive if SUPs were hollow without internal air pressure or framing?

Or you could add foam and radically increase the weight to present your case...

http://youtu.be/_FSoV6Hv8eQ

I know it's heresy to question a respected elder. So perhaps a real engineer can correct my assumptions.

Jim
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clay

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #1 on: April 30, 2016, 09:57:42 AM »
Interesting thread, I enjoyed watching the videos, thanks for sharing.

I love hearing from master board builders/shapers like Jimmy, and I like his boards and love his noserider.  I can testify first hand to the durability of his boards and I suspect he has the strongest boards on the market.

I also enjoyed this video:


A question that comes to me is:  is there a cost to stiffness and a lack of flex?  Or does the lack of flex lead to a less alive or unresponsive feel?
I suspect the only way to test this is to ride a custom shape that has the identical dimensions and shape of a production board.
Aloha, I welcome and appreciate all responses of positivity and good feeling.

YouTube: https://www.youtube.com/channel/UCOIE6FWr1SpWvbPJIIiEgog

PonoBill

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #2 on: April 30, 2016, 11:13:56 AM »
If you use a more sophisticated construction method, like a sandwich, you can design in the degree of flex you want. Most manufacturers don't, but it's feasible.
Foote 10'4X34", SIC 17.5 V1 hollow and an EPS one in Hood River. Foote 9'0" x 31", L41 8'8", 18' Speedboard, etc. etc.

The Kernel

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #3 on: April 30, 2016, 02:43:13 PM »
I'm convinced. 

Next project is to put quad fin boxes into a longboard that I rescued from a beach trash pile.  It would be my first attempt at fin boxes; I've done more extensive work (delams, snapped noses) but have been a little hesitant with fin boxes because of what I saw as the inherent weaknesses as they are set into a board. 

Now I'm thinking I'll just put in PVC foam first, then set the boxes into that.
Kernel:  Cutting through the bull**it.
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coldsup

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #4 on: April 30, 2016, 03:33:03 PM »
No sign of any deck compressions or dents in my JL's....but they chip just like the rest when they get paddle whacked

Dwight (DW)

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #5 on: April 30, 2016, 04:40:41 PM »
Much of the industry used to build them like JL. Remember Surftech surfboards, Randy Frenches company. After Seatrend.

Everyone moved away from that construction because they surfed like crap. Surftech tired to save itself with constructions that felt better, but too late. You don't see Surftech in any surf shops anymore. They used to be everywhere.

Bamboo surfs a little nicer.

Plain old glass over much denser foam surfs best, but Jimmy doesn't talk about that.

He told the truth, but not the whole truth.

Now we've got Innegra in lots of boards. Hammer proofing without any sandwich.

JimK

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #6 on: April 30, 2016, 06:34:04 PM »
Sunova is definitely designed with flex not much but it makes a difference
My 2 cents
JimK

southwesterly

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #7 on: April 30, 2016, 06:49:43 PM »
Seems like board flex has already been done.

Eagle

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #8 on: April 30, 2016, 07:13:13 PM »
Jimmy does make a nice board - but our boards from Bark Starboard and SIC are nice as well.  Have not had any major structural issues with any of them. 

The interesting aspect is his M-14 I-Beam is just half a pound heavier than our more expensive SB 14 Touring Carbon and nearly as stiff.  So overall his glass sandwich works just fine and is relatively lightweight.

Have one small dent on the deck - and the nose does flex a bit in big steep waves upwind.  So not bad for a glass board.

http://www.jimmylewis.eu/boards/m-14-m-126/
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Bean

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Re: Jimmy Lewis taking about his construction vs. others
« Reply #9 on: April 30, 2016, 07:56:37 PM »
One of the first things that I noticed with my 9'6" JL B&B was that it had a similar feel to my 10' polyester based long board.  Very lively. 

linter

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #10 on: May 01, 2016, 04:39:42 AM »
 i heard that dave daum at kings paddlesports has come up with a new resin or some such that is indestructible.  i mean, literally.  heard he's working on getting a patent right now ....

Ichabod Spoonbill

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #11 on: May 01, 2016, 07:12:20 AM »
I'm still looking for a hard touring board that can take a rock impact. I'd love that resin idea to be true.
Pau Hana 11' Big EZ Ricochet (Beluga)

coldsup

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #12 on: May 01, 2016, 07:24:03 AM »
i heard that dave daum at kings paddlesports has come up with a new resin or some such that is indestructible.  i mean, literally.  heard he's working on getting a patent right now ....

Is he trying to put the rest of the industry out of business :D

lucabrasi

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #13 on: May 01, 2016, 07:52:57 AM »
I'm still looking for a hard touring board that can take a rock impact. I'd love that resin idea to be true.
Jimmy's Searcher. Worth every penny in my mind tho I found a great deal as well. I got a different board on the way from him as well that may fit your needs. I will let you know more in a month or so about it.  Tho I am going to make an effort to "pack light" this season I will still be loading her up I think.

Ichabod Spoonbill

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Re: Jimmy Lewis taking about his construction vs. others..
« Reply #14 on: May 01, 2016, 11:16:06 AM »
Thanks, Luca. I'll keep an eye out.
Pau Hana 11' Big EZ Ricochet (Beluga)

 


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