alden haverly

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@michal5869 11 ай бұрын

hi what accelerometer chip is inside Wixey WR300? the most of smartphone accelerometers for angle counting has Linear acceleration sensitivity = 0,061

@Subscribe2Glide Жыл бұрын

Great videos! You should make tuning vide for flat water pumping and dock starting specific. I use a 3 degree negative mast shim for increased forward surge and a positive rear wing shim of 3 degrees for increased stability. I am going to test adding a negative shim to the fuselage for even more forward surge when pressing down on a flat board so i dont have to angle the nose down to drive speed and so i reduce drag during the weightless climbing phase.

@brucespradley5328 Жыл бұрын

Get a second opinion

@pedromarcos1472 2 жыл бұрын

Shiming the mast does the exact same thing as shimming the glider, assuming the fuselage doesnt bend

@livingsevilla9854 2 жыл бұрын

thaks for sharing, only one question if you are so kind of reply. where in the horizontal length of the wing you measure.? (half way from fuselage to end of the wing?

@aldenhaverly 2 жыл бұрын

Two to three inches from the fuselage in most cases depending on the foil shape.

@markusbroyles1884 2 жыл бұрын

ALL the details needed to get these issues top notch ! HERE'S a ton of gratitude from a do it yourselfer ~ yay !!

@jessewilson73 3 жыл бұрын

Thank you I got a new Takuma and it’s razor city. I’m going to take it down. The previous owner sprayed it with black paint to cover scratches It’s rough but not orange peeled. Just wet sand with 400?

@jogo8502 3 жыл бұрын

Does this also apply for windsurf boards ? (I guess so)

@enzodebredo 4 жыл бұрын

does it make a difference when the stabillizer is mounted on top of the fuselage!?

@werdasliest 4 жыл бұрын

I always wonder if the front wings are at 0° AoA (in line with the fuselage) and the lift will be greated by the Naco profil itself. Or is it usefull to give the frontwing already an 2-4° AoA ? I am more interesstet in an foil for pumping . Would be also great if someone has experiance what kind of Naca will work out. Hearing a lot of diferent things at the moment. Naca 63 210 or 6412

@thefoildesigner 4 жыл бұрын

Most thread I have read were not very convincing. Has to do with the back ground of writers/shapers/foilers I think, most are purely experimenting and interpretation are not always accurate IMO. You often see that on how folks interpret the role of bottom contours on surfboards. Regarding your questions, I have been wondering the same for a while but some facts make me think that wing profile has little to do with the lift, or at least not as much as the angle of incidence (AoI: the angle of the front wing relative to the fuselage, AoA is what YOU control with the board pitch). Fact 1 is that planes can fly up-side down by compensating the down ward lift (if any) of the wing with the AoA. Fact 2, which is more telling for what we do, is that Naish moved away from asymmetric profiles few years back and are now using only symmetric profiles. If lift was indeed primarily governed by the profile, then you would expect NO lift on these wings, and as far as I know, Naish sells them by the metric ton so they work. At the end of the day, you as rider will adjust you board level (the AoA) to optimize the speed. If your AoI is off by several degrees, you may ended up having to pitch the board more than you should to correct it, which may not be comfortable, but theoretically doable. I recently built a large aspect ratio for a wing surfer with only 0.5 degree AoI. The goal was to be able to go fast and reduce drag and he loves it! For pumping, since speeds are rather low, I would thing a larger AoI is required, maybe 3 degrees. Finally, the thickness of the wing will most-likely affect the drag, so fast wings (like for kite or tow-in) are usually very thin and have (I assume) a low AoI. XXL wings for SUP are usually thinker, thus slower and easier to control and presumably have larger AoI.

@Twizz1979 4 жыл бұрын

Awesome videos. You had me at turbulent vs laminar flow!!! 🤩

@ΘεοδωροςΚαρρας-ω2β 4 жыл бұрын

Hi I believe that you will have the same effect if you alter the top front or the bottom back at the joints ...and vice versa...

@ΘεοδωροςΚαρρας-ω2β 4 жыл бұрын

On second thought...i am wrong and he is Wright....sorry...

@gastonbarouille767 4 жыл бұрын

Thank you for share your knowledge! You explanation was super clear. I have an RRD85 foil and it's super lifty. has an 85cm mast, 120 boom, 80 wing and 38 stab (plus another 55 stab purchased separately). I put a stainless steel washer in the front screw of the stab to make a trim correction

@hugoacuna8918 4 жыл бұрын

I would like to contact you and ask you a question. Do you know how I can do that through KZbin?

@thefoildesigner 5 жыл бұрын

Thanks for the info. I am currently building my own foil system from 3D printed parts vacuum laminated with carbon fiber/epoxy. What coating schedule would you recommend to get best finish. I have currently done one hot coat that I sanded following be a gloss coat, all with epoxy. Unfortunately, I can still fell some irregularities (weaves and bumps) when sanding gloss with 320 and up. My issue is that each time I gloss the parts I get drips and the edges which are a nightmare to sand. Should I sand everything down to 120 and them apply clear coats + wet-sanding and buffing for best finish? I would like to avoid compounds as much as possible for esthetic reasons. Thanks!

@kjeldthorlund7009 5 жыл бұрын

Thanks Alden, good tip. In regards to sanding does it make sense to sand the rear of the wings (front and rear) to avoid them being knife sharp, or will it damage the flow / performance of the foil?

@chrisanderson6942 5 жыл бұрын

george needs to hit the qym

@rprudon361 5 жыл бұрын

Great tips and very helpfull, do you also have tips for adjusting the mast position?

@gabriellecorre2325 6 жыл бұрын

Nice to see some videos again!!! Many thanks for your explanations!!!

@RobSAtlanta 6 жыл бұрын

Alden, This is SOOO helpful. I've been using West Epoxy with various fillers to fill scratches for years (what a mistake- too HARD to sand it just right). Is there a way to pigment or get the glazing in black? Then it would blend in perfectly when maintaining our carbon foils.

@unihenke8913 6 жыл бұрын

Good video. Keep them coming :)

@RobSAtlanta 6 жыл бұрын

Thanks for sharing the symptoms of a rear foil having too much angle of attack vs. too little! Very helpful

@TheNewps 6 жыл бұрын

Another great foiling explanation video Alden. Thank you for sharing your knowledge and experience. I keep coming back and watching your videos over and over. It reminds me of what I should be thinking about when I make adjustments.

@s2oooo 6 жыл бұрын

Absolutely awesome 2017 naish hover foil 92cm 160 hover board. Insane amount of front foot pressure needed. Not being able to shim the mast I've just cut an angle on the bottom . Absolutely perfect it is so much easier to use thank you sir from the uk.

@rikardwildare1714 6 жыл бұрын

Hi! I am working on a electric hydrofoil board and I would love to hear your thoughts on the AOA of the rear wing when the forward force is coming from a propeller placed just above the rear wing. One would think that the angle would be the opposite from when a kite is used to "propel" the foil. What do you think? You can se the build on Instagram @wildtech.eu. Thank you.

@junuhunuproductions 6 жыл бұрын

Wow, your build is awesome. I love seeing the process of making :)

@zzebowa 6 жыл бұрын

Regarding the laminar to turbulent flow transition. With turbulent flow skin friction increases, but the foil has a lower effective frontal area, which causes less drag friction. This is the reason golf balls have dimples, to cause the boundary layer to go turbulent sooner. It reduces drag. I have been looking at the Reynolds number for a 4 inch wide foil in water, airfoiltools.com/calculator/reynoldsnumber?MReNumForm%5Bvel%5D=10&MReNumForm%5Bchord%5D=0.1&MReNumForm%5Bkvisc%5D=9.7937E-7&yt0=Calculate, and the Reynolds number is 1 x 10^6. This is well above the critical Reynolds number of 4,000 at which the layer transitions to turbulent so the flow of water over a foil at 30 mph will always be turbulent.

@theseatpostman8961 6 жыл бұрын

Hi George, thanks for the informative video. If setting up a surf or SUP foil I would presume the stabiliser angle would be less as the nose of the board is not driven down as in a kite board?

@aldenhaverly 6 жыл бұрын

Yes. You’re apsalustly correct

@pcatran 7 жыл бұрын

Hello, I will try this today afternoon. How many degrees aprox would it be advisable to increase? thanks

@pcatran 7 жыл бұрын

pls check my foiling on the waves ;-)

@MaciejPiotrowski 7 жыл бұрын

Great tips. Thank you.

@cesarbressiani2551 7 жыл бұрын

Please activate the Portuguese language in your videos thanks. Will have greater visualization.

@christianlassen1577 7 жыл бұрын

There's a couple videos of guys doing flatwater pumping on a foil board, once they get some speed (boat or paddle) they're foilborne and pumping to keep self propelled for a couple hundred yards. What kind of design and angle do you think would work best for something like that?

@glennvanrooij5571 7 жыл бұрын

Hi Alden, thanks 4 this video. I have shared it on the Dutch facebook page for hydrofoiling. facebook.com/kitefoiling/

@mfuzita 7 жыл бұрын

Dear Alden what you suggest for stand up paddle? What wing and stabilizer size? Regards Marcelo

@Mcfly77777 7 жыл бұрын

Outstanding tips, thanks so much for putting these videos together.

@fungyang742 7 жыл бұрын

Nice!

@SparD4029 7 жыл бұрын

I don't have too much front foot pressure on my Spotz 3...

@christophemeletiou9078 7 жыл бұрын

Wouldn't shimming the back wing also reduce front foot pressure?

@aldenhaverly 7 жыл бұрын

+Christophe Meletiou yes but not every one has a adjustable back wing. Some are a one piece foil

@gb8327 6 жыл бұрын

Ok, but if it is adjustable, then surely that is the much simpler option. Simply shim the rear stabilizer wing?

@sergemann5951 5 жыл бұрын

Can someone explain how that's done? I have a 633 moses and I am very light guy. Which way would you tilt it to? It has two screws. would you shim using the front screw or the back? Thanks in advance

@sampep 8 жыл бұрын

Amazing! Thanks for this video and keep them coming:)

@SaulOhio 8 жыл бұрын

If the hydrofoil is used on a windsurfer, is there any difference in how much angle of attack is needed?

@aldenhaverly 8 жыл бұрын

The angle should be between 2 to 3 degrees +SaulOhio

@robrockwindsurfboards75 8 жыл бұрын

If the fuselage goes horizontally through the water! What is the angle at which the main wing goes through the water ??

@aldenhaverly 8 жыл бұрын

+Rob Rock Windsurfboards ideally the main wing is parallel to the fuselage and the rear wing is between 1 and 3 degrees depending on your foil setup

@markusbroyles1884 2 жыл бұрын

@@aldenhaverly This is the detail that I've been missing ~ but right on time now as I plunge into making up a set of these foils and masts and boards for myself... ALOHA !

@SaulOhio 8 жыл бұрын

5 inches in front of the front screw of the front wing, or of the mast?

@Rick_Cavallaro 8 жыл бұрын

Very helpful. But I'm wondering what screw you're referring to when you say the center of your stance should be 5" in front of the front screw? Is this the screw that mounts the mast to the board, the fuselage to the mast, or the front foil to the fuselage? Thanks.

@aldenhaverly 8 жыл бұрын

The screw that the video is referring to is the screw farthest towards the bow of the board that is used to attach the strut to the board.

@Rick_Cavallaro 8 жыл бұрын

Thanks! I'm up and riding now, but still a ways to go.

@SaulOhio 8 жыл бұрын

Oh, OK.