The_navigator_© wrote in message ...
Why don't you read them yourself? WE already know how a sailboat works.

Cheers MC

Since you try to explain the sailforces using false "longer airflow
path behind the sail and sail beeing a "half venturi pipe", you seems
to need more correct physical flow information!

Jan-Olov Newborg


How local pressure gradients are created by turning the fluidflow you
can read he

http://www.scienceweb.org/movies/aero.htm


Here are some links of flow physics (not flow mathematics):

A Physical Description of Flight ©
http://www.aa.washington.edu/faculty/eberhardt/lift.htm

Bernoulli Versus Newton
http://www.grc.nasa.gov/WWW/K-12/airplane/bernnew.html

What is Ground Effect?
http://home.mira.net/~radacorp/ground_effect.html

Operational use of angle of attack (AOA) on modern commercial jet
airplanes
http://www.boeing.com/commercial/aer...12/attack.html

Weltner Lift
http://www.rz.uni-frankfurt.de/~weltner/
http://www.rz.uni-frankfurt.de/~welt...ht/PHYSIC4.htm

Weltner Bernoulli
http://www.informatik.uni-frankfurt..../MIS/mis6.html

Incorrect theory number three
http://www.grc.nasa.gov/Other_Groups...ne/wrong3.html

Lift from flow turning
http://www.lerc.nasa.gov/www/K-12/airplane/right2.html

Jef Raskin - Coanda Effect: Understanding Why Wings Work
http://www.jefraskin.com/forjef/jefw...da_effect.html

F18 Soundbarrier and highspeed pass
http://www.algonet.se/~newborg/

Beaty Gif pictures smokepuls plus SAAB 2000
http://www.amasci.com/wing/airgif2.html

Prof. Colombinis photogallery
http://www.diam.unige.it/~irro/gallery.html

Flow around an airfoil
http://www.diam.unige.it/~irro/profilo_e.html

ScienceWeb - Aerodynamics
http://www.scienceweb.org/movies/aero.htm



Lift from spinning balls

This website gives a lot of references all back to Newton/Robbins!

The Magnus Effect
http://www.geocities.com/k_achutarao...ew_magnus.html

The Science of Swing, maintained by James Foster
http://www.soest.hawaii.edu/GG/STUDE...ter/swing.html

Normal Swing
http://www.soest.hawaii.edu/GG/STUDE...er/normal.html

Reversed Magnus effect explained
http://www.soest.hawaii.edu/GG/STUDE...r/reverse.html



Wrong lift explanations

Smithsonian
http://www.nasm.edu/galleries/gal109/NEWHTF/HTF510.HTM



False Bernoulli explanations

How things fly, an interactive gallery. Bernoulli Brain-Teasers.
Activities you can do at home
http://www.nasm.edu/galleries/gal109...XT/TEASERS.HTM

US AirForce Museum
http://www.wpafb.af.mil/museum/zone/ff3.htm

Dr. John S. Denker online aerodynamic book. Wrong Lift explanation
explained by "Circulation flow 'creating' the Velocity Field"
http://www.monmouth.com/~jsd/fly/how/htm/
http://www.monmouth.com/~jsd/fly/how/htm/airfoils.html




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