Hi,
Some pics of my venturi surfboard experment goes well draws some air through the air intake manifold
The exhaust port air out let
cool! so...you gonna give us the theory, or a ride report, or an explanatory diagram or anything? Magic carpet rides on air? - btw, 9 fins?
Hi,
Once the board is in motion air is sucked through the intake manifould.
Down through the transfer chamber.
Due to the low pressure area at the exhaust port where a venturi affect is takeing place.
The more area that is hollowed out going into the tail the great the amount of air is pulled through.
You can hear the air being sucked through at the nose esp if you have a large hollowed out section going to the tail.
The one you see is only a small hollowed section but enough to get the air through to break the water tension.
Helping to release the tail when turning with such a large wide fast tail area.
The principle: http://www.carbkitsource.com/carbs/tech/articles/Carburetion/Carburetion4.html
It works on the same principle as an old carburetor.
Hi,
Why so many fin attachments = 9?
The board was maid for expermental purposes so I could try many combination thruster, twin fin, quad etc
Standard fin combinations adding Adjustable Wing Twin Fin to the mix just anything and everything haveing a lot of fun.
But just a standard set of Adjustable Wing Twin Fin will keep you there and keep you loose.
Thank you
Seems that this idea has sprouted again,…I first saw this in Cocoa Beach in the late 60’s, along with finless and full slot bottoms.
Then in the early 70’s Morey did a take in Maui.
However, I was under the impression that the air cause friction loads-----slowing not accelerating the board.
Aloha, Randy
Nice...
If you were to place the intake under your front foot you could control the air feed by moving your foot.
Would be like an F1 car, have it nice and planted when doing turns, then BOOM move the foot, open the intake and down the line it goes!
hi wf
i'd be keen to hear / read / ?see footage of how it takes off , bottom turns , holds in trim , gets tubed , does reos and cutties ....
a mate of my brother [ Kim , by name] had a similar 'air intake ' , combined with the erle pedersen jet bottom , in a 1981 ? kewarra ' board he had .
can you please post a photo of it set up with all 9 fins in the plugs , too ?
cheers !
ben
[quote="$1"]
Nice...
If you were to place the intake under your front foot you could control the air feed by moving your foot.
Would be like an F1 car, have it nice and planted when doing turns, then BOOM move the foot, open the intake and down the line it goes!
[/quote]
Stall that wing with the f-duct! I'm waiting for the first surfboard with a blown diffuser myself. Bernie will change the rules right after it's developed, lol. Maybe we can use flow-vis paint to verify CFD and wind tunnel testing?
Hi,
Yes I have seen a lot of chat about this before and probably lots of experiments done in the past.
I do not feel any drag but then the rear of the board is very wide and fast, the wide point is 19" and is 32" from the rear of the board the board is 7’2". The tail is 9" wide.
There is no air pressure build up the camber running to the tail is a V shape so there is no compression.
As you go faster the board it begins to ride on just the 2 surfaces on either side of the chamber with the uncompressed air separating it, the air has no affect on it just like the air on top of your board has no affect.
Thank you
Hi,
Nothing like a good imagination.
Is that your emial and website:
mike@coilsurf.com http://coilsurf.com http://c.slum.se/
If so can I contact you.
May be send you a fin to try.
WaveFin
Hi,
If I had some one and a movie type camera I would put up a lot of footage but I don’t sorry.
What area are you from in Australia I am from the Gold Coast.
Nice pics in your blog
http://bchipper.blogspot.com.au/
Thank you
Hi,
Sounds like a radical move rev up your surfboard guys fun in the sun.
Thank you
[quote="$1"]
Stall that wing with the f-duct! I'm waiting for the first surfboard with a blown diffuser myself. Bernie will change the rules right after it's developed, lol. Maybe we can use flow-vis paint to verify CFD and wind tunnel testing?
[/quote]
Haha..indeed!
I'm waiting for a surfboard where the lack of ability can be converted into forward thrust...... if only there was a way to fit a motor inside a surfboard. 8| (cunningly wating for someone to bite).
Wavefin, do you feel a difference between closed and open ports on the same board using the same fin set-up?
Hi,
I have not surfed the board with the intake air ports closed. One would have to make the exactly same board with just a normal bottom to compare. But next time I go out I will tape them shut at the nose to feel the difference.
Thank you
Great to see someone trying something thats “out there”, a really interesting thread.
Any chance of some detailed pictures of the fins, closer pictures?
Have you tried this stuff with a more conventional finshape?
Why the fin shape?
Innovative character, the board shape, the air, the fins … I love it.
I would really like to see a vid, no matter how good or bad, just to see whats going on.
Wavefin,
You are to be congratulated…you put your money where your mouth is - in that you’ve come up with a concept and actually put it into a build and, basically, put it out to your fellow surfers with descriptions and theory for all to enjoy, contemplate and attempt for themselves.
Great progressive stuff that epitomizes Swaylocks - my hat’s off to you for putting it out for all to enjoy !
Very recently, there’s been claims here by a couple of people that they have come up with the greatest fin (and/or finless -depending on whose posts you read) design that will revolutionize surfing - without crap to back themselves up - and there’s all kinds of “Oooohhhs” and “Aaahhhs” cause they once came up with some stoned attempt to cash in on advancements in fin box systems way back when - that 5 or 6 people tried and discarded - and they think there’s money to be made on a fin (or finless) design - and they won’t share it unless you’re willing to pay, and/or invest, in them. That’s bullshit !
Nobody EVER made money on one fin (or finless) design - THEY SHARED IT !
Thank you Wavefin for a breath of freash air - and lack of egotistical comercialism - in a place that shares and doesn’t lurk for investors.
This is Swaylocks at it’s best - I love reading these type threads -
Thank you