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Topics - SUPeter

Pages: [1]
1
Wingsurfing, Windfoiling, Wingfoiling, Wing SUP / DIY Kite Wings Anyone?
« on: November 11, 2019, 06:05:18 AM »
Just curious.  Anyone else out there trying?  I made one, which at 3.6 M is too small for the types of wind we get in Maine.  Currently making a 5M .  It is not easy!  Maybe I do it just to grow some neurons. Being such a new sport, I can see there being so many improvements to current gear in the not too distant future. 

2
Wingsurfing, Windfoiling, Wingfoiling, Wing SUP / DIY kite wing
« on: April 16, 2019, 05:14:22 AM »
I have many old kitesurfing kites and am plan on cutting them up to fabricate a kite wing based upon Duotone, Ozone, and or Naish kitewing types.  Any information to add to the current brain storm in my head would be appreciated.  That just looks like the perfect tool for Maine, where the beaches are few and the winds are many.

3
Foil SUP / possible E-foil project?
« on: March 08, 2019, 07:02:34 AM »
While at a second hand store the other day I picked up a working fishing trolling motor for $15.  I figured, what the heck?  It may give me enough thrust to at least get my big wing up and flying, its the right size, shape, ......?

Has anyone ever tried using an electric motor like this to create an e-foil?   Just have to figure out the control mechanism required to turn it on and off.  Possibly a cable or wire to a trigger in my hand.   

4
Foil SUP / Wing shaping and wing washout
« on: February 20, 2019, 12:34:01 PM »
Yes, I know, What the hell does this mean?
I am making a new wing(41"W x 9" cord) in hopes of downwinding and if I get good enough, some paddle assisted flatwater takeoffs.  As I sit here and ponder the wing segments glued to my anhedral form I can not help but wonder if I would benefit from having some washout at the wing tips.

What is washout, you ask?  Washout is when the wing tips are slightly twisted down to decrease the angle of incidence  when compared to the root of the wing.  If all wing segments are in the same angle of incidence, there is no washout. 
Washout is used in airplanes to decrease sudden stall in low speed situations. Though in the world of hydroplanes, there may be no benefit. 

I am wondering if anyone has ever taken the time to notice whether or not the angle of incidence of their wings root is identical to the angle of incidence of the wing tip.  To do this one would have to use a level and place it on the middle of an upturned wing exactly for and aft. Make it so the level reads level by altering the boards position.  The more difficult part is to place the level in an absolutely parallel position to the middle line of the wing, but this time near the wings tip(3"from tip)?)  Are the measurements level or does the level now angle up ever so slightly(down when surfing)?

Just curious, as I have always made my wings with no washout.   I would love to hear from those more knowledgable in aerodynamics and hydrodynamics. My guess is most wings have no washout and I will just have to experiment or, more probably, stick with what I know.


5
Foil SUP / Anyone with experience with bi-concave wings?
« on: January 22, 2019, 05:21:28 AM »
You know Da Kine.  There is a slight amount of double barrel concave on either side of the fuselage.  At the present time I cant seem to recall which companies produce such wings but Slingshot and Signature wings come to mind.  I up here in Maine and do not get to see any production wings in person.  The only production wing I have met in person is the Naish Thrust.   If any body has any experience riding this wing design and can compare it to non-bi-concave wings I would love to hear all about it.    Thank in advance!

6
Foil SUP / Changing cord to thickness ratios from wing root to wing tip
« on: January 21, 2019, 08:28:03 AM »
There has got to be someone out there who has information regarding this topic.   I am in the process of making a very large( 42" wide) downwind wing for my measly 155 lb body weight.   I also hope this wing will allow me to flatwater SUP start, eventually.  I have often wondered if decreasing the cord:thickeness ratio starting from wing root and decreasing towards wing tip would help with regards to increasing maneuverability of these XL wings.  Not sure if I want to go there.  For example, Wing root- NACA 4416 down to wing tip, NACA 4414.  Just a thought.  maybe it would lessen the outer wing torque against your feet?  Just wondereing.

7
Foil SUP / Dry Land Training
« on: November 14, 2018, 07:12:55 AM »
Dragged the old unicycle out of the shed since the gales of November have pretty much destroyed our surf opportunities. Not to mention having to kill some time one afternoon.  I was absolutely amazed how similar riding a unicycle is relative to foiling.  The whole upper body turning thing is practically identical though more pronounced on a unicycle, unless of course you are Austin Kalama.  His upper body swinging motions are just about the same.  I just hope it translates to better foiling technique while I wait for better conditions.

8
Foil SUP / Inserts for foot straps?
« on: October 16, 2018, 01:24:38 PM »
Having never put foot straps on a board, I was wondering what all the foot strap guys use for inserts into the board.  I was going to use stainless T-nuts but figured you guys would have a better alternative.  Thanks, in advance.

9
Foil SUP / A little is a lot
« on: October 08, 2018, 06:22:46 AM »
I'm not really sure who said this first with regards to foiling but find it to be the perfect  descriptive phrase for foiling. .  Dave Kalama comes to mind though it could have been a number of other early adopters of this addictive sport.  Finally finished my 6' x 29" Fugly and other than the need to move my tuttle back 3" , it worked quite well.   
    Now to get to my point.  Over the years I have spent a considerable amount of time reviewing the research having to do with surface skin drag reduction on hulls moving through water.  Anything from polymer infusion, air bubble infusion, super hydrophobic surfaces, riblets of varying size and texture, Earl Pedersons "Jet Bottoms",  Jick Mebane "Jick Bottoms"  and various other methods. 

    My hypothesis being that if we could lessen the surface skin drag by only a small amount we may be able to create a board that lifts free of the surface that much sooner and with greater ease.  To do this I used the same carbon fiber tow strips to create a rippled surface that would decrease the laminar flow, adding a slight bit of "confusion to the water, thereby decreasing the drag coefficient.  Of course, this is not easy, having to vacuum bag the glass over these strips to maintain the ribbed and pleasurable feeling.  Well, it got done and with a bit of cabinet scraping of the valleys there is a noticeable ripple to the bottom of my board. 

     Now, I have only tried this board once and on a very big day which is not ideal at my experience level but here is what I found.  Maybe Kalama type Fuglys do this automatically, but compared to my 7' 4" Simmons inspired SUP, this board got up to speed and flying almost immediately. Of course, I have no control group to compare with but I was impressed.  Maybe it's the Placebo Effect but at least I'm satisfied with the fact that all this work trying to texture the hull did not slow it down any.  It is going to take some getting used to but so far so good.   

     I definitely would appreciate any one else's experience or knowledge pertaining to the subject of "Skin Drag Reduction"  But I will continue with the notion that in all aspects of foiling--------------------A Little is a Lot!

   

10
Foil SUP / Foot strap placement?
« on: September 25, 2018, 04:24:52 AM »
I have read past posts regarding this topic but none give specifics.  Having never put straps on a board, I am wondering how far off center to put the mounting nuts.  Just thought I'd ask before I do this.  I know where my feet are going but am curious as to how much to the toe side of the stringer they will be attached.  Thanks in advance.

11
Foil SUP / Stability of Kalama type "Fugly" boards witout mast and foil
« on: August 04, 2018, 06:14:09 AM »
Anybody ever get on one of these fugly  boards without the mast and foil?  It appears to me that they would be somewhat unstable with the least amount of foam at the rails.  Without the  stabilizing aspect of the long "keel" I would imagine that they are tricky to balance on. 

12
Foil SUP / Anyone with specs on the Dave Kalama type foil boards?
« on: July 10, 2018, 04:37:10 AM »
I'm looking to make a new foil board like the ones Dave Kalama uses both on ocean waves and in the Hood River Gorge.  You  know da kine.   The real short, rectangular plan shape with the heavily beveled edges and stern.  I have a pretty good idea of what it will be but thought it would not hurt to ask.  After foiling for some time I am now coming to realize the benefits of having a board that can be easily "pitched", for and aft, for getting increased foil speed for take off as well as getting the board out of the way while flying.  Thanks in advance!

13
Foil SUP / Shape of wings to come!
« on: July 05, 2018, 06:34:44 AM »
Finishing up the new Big Wing!  The lacewing method is making experimentation quick, easy and inexpensive.  Having an internal skeleton practically eliminates the need for all that expensive carbon cloth of the traditional exoskeleton.  Warning-  the process carries a high risk of addiction and chemical dependency.  Participate at your own risk. 

14
Foil SUP / Re: River Foil Surf
« on: June 09, 2018, 02:58:01 PM »
    Thicker wing definitely makes hanging on the wave easier.  The foil is unfortunately more sensitive to boils and turbulence making it more tricky to control.   Pumping or I should say unweighting the board allows it to gain elevation and position itself near the top of the wave.  From there, its a downhill coast until pumping is needed again.   I am looking forward to a better tide range and a larger wave.  Not sure how that will go.  At this time there is too much kelp guarding the entrance onto the shoulder wave.  We usually scoot across the shoulder wave to the main face on regular surfboards, but with 2 plus feet of mast and wing, I'm not so sure.   I cant seem to put the link into the attachment box but then again, maybe I don't have to. 




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