Thank you, very use response. Poor wording can confuse the novice, relative to the wing chord at the tip (Fig 2b) the upwash (angle) seems a...
Confusion: the outboard forward tilted lift and thrust,as presented in the NASA paper's diagram, should increase heel. The trade off looks bad,...
Brummer's negative loading at top and Erwan's top sail inversion would indicate a reversal of downwash, does this transition effect the tip...
In the NASA paper there are associations with bird flight yet the wing tested and bird wings are quite different. Fig. 2 shows a bulbous LE,...
I assume the trim recommendation to have the top leech telltale not stream aft is an indication of upwash, not stall. Nice to see a vortex, even...
Seems past research involves aircraft, where lift and control must be balanced against thrust, if thrust were the main objective, it might lead to...
Questions after reading https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20160003578.pdf Could a taller but progressively lighter and...
If looped line or hook passes between the sail's foot and boom, this requires a 2 handed embrace of the flailing boom which I hope to avoid....
Yes, though because of roach this is beneath triangle in use especially in first reef.
Tying in excess sail fabric in slab reefing is most effective at last outboard reef point, yet is the most difficult to reach and often left...
A lot of the complications were experimental variables that proved useful for performance, like to experiment on a completely different kind of...
The system: DIY servo pendulum with variable vane to pendulum linkage, this has not been tested by ocean crossings or extreme weather, but has...
No experience with tankers but best performance sailing a delta on a Sunfish hull was with no camber and only offwind, high lift vortex forms on...
Wet behind the ears in fluid mechanics! Hard for me to see the down wash when most of the surface flow is pulled up into the LEV? Some delta LE...
These tests were just to establish flow patterns, flow was from a 36" fan through 2X2X2" grate. No more model testing, but have had fun sailing...
Seems few limits on extracting energy from wind. Gliders, losing altitude in a down draft can gain more kinetic energy than they lose in potential...
Seems utilization of Katzmayer effect best on the stable platforms of foilers and iceboats. Does Stanford paper indicate possibility of a glider...
Nice to see my speculations are real to more skillful sailors. By "beyond a frightened mind" I mean a feedback system to maintain full...
Could some gains made upwind in gusty and choppy conditions be from "extracting energy from atmospheric turbulence"...
Reread C.A. Marchaj's Sail Performance chapter "The Sail Performance of Various Rigs" which inspired much of the interest in vortex driven...
