NACA Foil sections

Technical discussion of ARC products
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thommerrill
Professional
Posts: 113
Joined: November 23rd, 2003, 9:15 pm
Boat Make/Model: ARC22,FMS20,F25c
Location: Dallas, Tx

NACA Foil sections

Post by thommerrill »

Is there a NACA web site that shows foil section drawings? I am looking for a rudder replacement thats about 48" tall. I know the ARC /RC daggerboards are around that height but am curious about the difference in design. I have tried a word search but but never found a drawing, just a few pics of ships.

thanks,
thommerrill
F25c 009 - Charisma
FMS 20 57 - newly faired and painted with Awlgrip -For Sale
Matt Haberman
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Foil Database

Post by Matt Haberman »

Thom,
You can try visiting http://www.aae.uiuc.edu/m-selig/ads/coord_database.html the database hasn't been updated for over a year, but none of the NACA sections have changed.
Matt Haberman
Aquarius Sail Inc.
http://www.aquarius-sail.com
thommerrill
Professional
Posts: 113
Joined: November 23rd, 2003, 9:15 pm
Boat Make/Model: ARC22,FMS20,F25c
Location: Dallas, Tx

NACA Foil sections

Post by thommerrill »

Thanks Matt-

I really appreciate your help with the link,

thom
thommerrill
F25c 009 - Charisma
FMS 20 57 - newly faired and painted with Awlgrip -For Sale
Bill Roberts
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Joined: November 17th, 2003, 9:13 pm
Location: Stuart, Florida

Post by Bill Roberts »

Thom,
The NACA foil sections are described in terms of % chord, 0 to 100%, and the thickness or the half thickness is described in therms of % chord also. There are no drawings of a specific size. What is provided is dimensionless and allows easy scaling to any chord dimension desired. The 63 series NACA foil sections provide the best, the highest, lift to drag ratio sections for sailboat rudders and centerboards. This is what your ARC22 foils are.
Good Sailing,
Bill
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