If you want to do the sums for yourself you can calculate the drag force on a chute under water using Force = 0.5 * Density of water * (speed)...
One very minor thing - the higher the aspect ratio of the hulls the greater the wetted area per unit displacement so light wind performance may...
Given all the difficulties of scaling - gravitational wave considerations need the flow speed to be reduced by the square root of the scaling...
I think the retracting foils have an advantage from the boat handling point of view - beaching a boat with foils lifted well clear has to reduce...
One of the reasons I'm interested in a scheme where the foils are fully retractable is that I think it's important to be able to operate in...
Yes, I did wonder about the limitations of racing rules - one of the reasons I'm not into formal competition - such things tend to get in the way...
Hi Doug and Simon It looks like I need to put some way of handling C of G shifts in the numerical model as well! - should be no great problem....
Hi Doug - Yes, I think it will be fairly easy for me to make the model so we can try any arrangement of wand positions and foils positions. I have...
Hi Doug - Yes I realise there is a shock cord providing a restoring force. In fact that was one other source of a rising gain with height effect I...
Sigurd - I think it is quite reasonable to have some loss in performance at low lift coefficients for sections with blunt trailing edges. For the...
""How about a mini version of the french tri foiler? make it about 23 feet long...."" While the French machine is a very fine design I think it...
Doug - many thanks that should give me a good starting point. I'm thinking of writing a model that just looks at three T foils with defined area...
Hi Doug - thanks for the welcome! My normal stomping ground is with aeroplanes and helicopters so I'm having a great deal of fun trying to...
Doug I'm not convinced that the midship wand is less prone to the problem you mention. One can draw similar diagrams - say with the wave crest at...
There are a number of things one could do to overcome the possibility of the foil producing a downforce or drag through being stalled. If you use...
Just to throw a sum into this. If we assume the foil could achieve a lift coefficient of about 1 (which is fairly conservative) at a speed of 20...