Recent Posts

1

Foil SUP / Re: Weight Matters

« Last post by PonoBill on January 31, 2023, 10:10:46 PM »

Gary Efferding (HiPer Tech) is still around in Hood River, still making amazing stuff out of composites, but he mostly does it for Insitu -- the drone company Boeing owns. I need to get him involved in some of the stupid projects I'm pushing forward. He's endlessly enthusiastic. The only problem is that when we get together it's an ADHD idea fest, and neither of us gets anything done.

2

Foil SUP / Re: new prop design for efoiling?

« Last post by PonoBill on January 31, 2023, 10:03:55 PM »

Cool, I'll work on that. I wonder if this thing can be made smaller than a conventional prop.

3

Foil SUP / Re: Weight Matters

« Last post by Beasho on January 31, 2023, 03:12:24 PM »

Back to the Weight. 

Here is a Matrix that shows what a board would weigh with:

1) 2X Layers of 6 oz Carbon around the whole board - This would be bomber AKA Heavy Duty.  12 ounces per yard of CARBON Fiber. 
2) 60% : 40% Carbon to Resin Ratio - This is what results from a vacuum bagging process
3) Assumed 2 lbs for TRACKS and reinforcement.  My latest TRACK Cassette was 19 ounces.  This leaves 13 ounces for reinforcement.

At this build schedule a 120 liter board with 1 lbs EPS foam (standard) would be 9.9 lbs. 

I have observed that most production boards come in 5 lbs heavier than these numbers.  And the manufacturers do not even post the weights (with some exceptions)

WHY? 

It comes down to construction method, and PAINT.  And when you do a minimal amount of research into Fiber to Resin ratios you will learn that heavier, non-vacuum bagged solutions are in fact heavier, more fragile and weaker.

Board shapes will change. 

These production methods have been around for 30+ years.  Windsurfers know, and remember the lightweight customs that used to come out of the Gorge in the late 80's and 90's.  Example HiPer Tech, Clam Sandwich . . . . 

4

Foil SUP / Re: Weight Matters

« Last post by blueplanetsurf on January 31, 2023, 01:46:01 PM »

The reason for balancing the weight of the board over the foil is so the board will fly by itself when it's unweighted.  This is crucial for dock starts and pumping.
This video shows how a well balanced foil mount will fly without tipping forward or backward:
https://youtu.be/_WPJ8kvsnLM?t=1471

5

Foil SUP / Re: Weight Matters

« Last post by jondrums on January 31, 2023, 11:33:31 AM »

I've never thought Kane's rule of thumb made any sense, but then he can foil circles around me, so I'm not in a position to make a big deal about that.

My own experimentation has landed in the same spot as Kane's rule.  Mind you this seems to be the optimum for pumping performance doing 2 for 1s and the like.

6

Foil SUP / Re: Weight Matters

« Last post by Hdip on January 31, 2023, 09:51:42 AM »

Sounds like the weight doesn't matter, but the shape does. People are obsessed with the idea that "the board doesn't matter" in foiling. We've got to stop saying that. The shape definitely matters.

7

Foil SUP / Re: Weight Matters

« Last post by Dontsink on January 31, 2023, 09:24:44 AM »

I just sold a 5.0 wingfoil board because it felt too heavy.Lost about 30% of the money i paid for it new
Loved the shape,track placement, the build quality,the specs...but i could not get used to the bigger weight and the sluggish inertia it created.
On a digital scale the difference was a ridiculous  +700 grams compared to what i am used to riding.
Sounds like nothing but it completely changed the feel in any conditions, way less fun and responsive.
In light wind it really affects the bottom end.

8

The Shape Shack / Re: Ultralight Board Designs

« Last post by jondrums on January 31, 2023, 09:00:46 AM »

another plus one for rspro cork deck.  I now use it on 4 different boards.  Its about $120/board, but so so light, very comfortable and great traction.  Here's my recipe:




I use less than half of the hex pads, and you might be able to skip them if you don't have a wide stance.  Here's what it looks like

https://www.instagram.com/p/Cah6j0CPxpN/?utm_source=ig_web_button_share_sheet

9

The Shape Shack / Re: Ultralight Board Designs

« Last post by Beasho on January 31, 2023, 08:59:19 AM »

I am going to add ~ 12 ounces of ding protection and it is scheduled to be 9 pounds 11 ounces.

10

Foil SUP / Re: new prop design for efoiling?

« Last post by jondrums on January 31, 2023, 08:56:34 AM »

pono, I'm quite handy with CAD and I know I could loft a copycat.  If you can share diameter and pitch that's been working well or better yet an STL, I might take a crack at generating a file one of these days.  I think I would want to know the root pitch and the tip pitch.  I know there are tons of files on FOIL.zone, but I can never figure out which ones are actually good to start with