The comments are partly correct. By the time Rasher is airborne the main foil is that close to the surface that it is of little help irrespective...
I have a moderately accurate VPP for predicting Moth performance. it correlates nicely with Ned's numbers and 40 knots is certainly possible with...
Doug The simple answer is yes, but once you are at speed the increase in induced drag is small and the "flapping" contribution is about 10% of...
Doug I don't say suck it at see will not work ; this technique has not been applied to aircraft for near a 100 years. However S and S is much...
To clarify a point and add to the debate(s). When David Lugg and I were developing his foiled int 14, we dismissed using any sort of add on device...
Bora A great bit of footage. I sailed 14's from the "rock" for nearly 20 years and we used to sail that same track many time just for fun, some...
Doug As soon as the tow line is released the bow rises before the front foil can respond and then with the drop in speed she sinks back into...
Canard will work OK the 11 foot model in the attached video is being towed from the top of the mast at about 60 degrees from its track
Mark your statements are true for aircraft that do not have their stability augmented with "auto pilot" gearings. The static margin analogy would...
Doug When testing our large Kooee model, we discovered why front wheel steering has not been successfully applied to sail boats. I certainly...
Doug Can you tell me where to find the video you refer to? Just because moths with bow wands experience more crashes than a centre wand may...
Doug Yes, linking both flap and elevator to the one wand is workable profided their motion is opposite to one another. However you really need...
Practical experience is always the best teacher but these days validated science can usually assist
New moth control system Doug Lord has requested my response I am sorry I have not been following the foiler and moth threads of late and...
Where the Breakthrough occured Breakthrough There is an old adage in aircraft design “ stability then control and then performance”. Wind the...
Ventilation Several years ago when we were sailing a large model tri-foiler we found that ventilation was occurring via the control push rod and...
Sigurd Ian Wards work was early in the piece when everything about foiling was difficult. Anhydral would be more difficult especially for the...
sigurd the trade maintains the angle of attack constant for a given speed and lift. The inverted "vee" foil was an idea for getting additional...
Just for the record re the development of David Lugg’s int 14 foiler David Lugg writes (july 2006) “Our initial aim was never to fully fly at...
frosh, one of the things that excites me about foilers is that their design yields to aerospace design methods and techniques. Inaddition their...