Author Topic: Foil design paper - knowledge source  (Read 701 times)

supmmmm

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Foil design paper - knowledge source
« on: February 12, 2020, 07:42:08 PM »
As I attempt to educate myself on the whys and howís of this foiling thing - came across this recent paper by some BC engineering students that Iíve enjoyed reading.
Thought I would share.
https://circuit.bcit.ca/repository/islandora/object/repository%3A909/datastream/PDF/download/citation.pdf#page15

red_tx

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Re: Foil design paper - knowledge source
« Reply #1 on: February 12, 2020, 11:04:10 PM »
such a shady link but I really want to read it. if it is real.

Someone else click it and let me know.
-red

PonoBill

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Re: Foil design paper - knowledge source
« Reply #2 on: February 13, 2020, 08:08:20 PM »
Yup, it's real, I read it. There's some interesting stuff, but  some of the technical detail is poorly explained: Equations without an explanation of the variables seems pointless. The resulting design is primitive. The fuselage to wing attachment and the stabilizer are particularly brutal.
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.

jondrums

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Re: Foil design paper - knowledge source
« Reply #3 on: February 18, 2020, 09:31:10 PM »
not to shabby for undergraduate engineering final project.  The tail looks huge, but I bet it rides quite stable (if a bit sluggish).  nice work

container

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Re: Foil design paper - knowledge source
« Reply #4 on: February 22, 2020, 10:24:10 PM »
In the words of a very well known new zealand boat designer- you must be an artist, designer, engineer and rider to create a good foil!

Wetstuff

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Re: Foil design paper - knowledge source
« Reply #5 on: February 23, 2020, 10:21:23 AM »
Atlantis Mistress .. Blue Planet MultiTasker ..   Atlantis Venom

SUPeter

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Theory only goes so far
« Reply #6 on: February 24, 2020, 04:35:04 AM »
Just about anything, even something built asymmetrically, will fly.  A riders position is all that needs changing in most circumstances.  Once you build one and determine which conditions it is best suited for, you will be on to your next one.  Again and again and again.  It took me six wings before I settled on the last two wings which are the only wings in use at present.  Of course, ones skill level changes as you progress dictating different wing shapes and types .  Here are some very basic tips should you get the urge to roll your own. .  While the  paper mentioned covers much in theory, any engineer will tell you, practice makes perfect.

Beginner
NACA 4415 to NACA 4417 or similar
Cord 190-198mm +/- 
Wingspan 26-29" +/-
Washout 1-1.5 degrees

Intermediate-Advanced
H105 or similar wing cross section, use a more blunt leading edge for forgiveness
Cord 120mm +/-
Wingspan 35-40" +/-
Washout 1-1.5 degrees


As far as the tail-  Just make it slim, 200-300 sq cm, and adjustable for angle.  You'll be making a few of these also.



« Last Edit: February 24, 2020, 04:38:44 AM by SUPeter »