Conventional seaplane hulls are kind of interesting in their step design and placement effectively making them two hulls (for a high speed and low speed regime). I wonder how this requirement would shape a tunnel hull designed for aviation.
Please take careful note that is a catamaran design NOT A TUNNEL !! AND THE CENTRE FOIL is the only thing needed for what I want to do the two small rear side foils are not required !
Instead of using "THE STEP" that everyone can relate to "it is not required" !! it would be replaced by the introduction of rocker shape in the hulls bottom !!The placement of the rocker is the key to the steps replacement !! The rocker would have another advantage also of a bad slightly nose down landing it would have the benefit of sucking the aft end of the hull down and self levelling the plane .I'm aware of the difference between a tunnel hull and a catamaran, I only thought that photo was of a cool cat, just checking to see if you are paying attention, as so few do.
Reference the last link I posted, it shows the foil, which could be at the very bottom of the hull, has already been invented and patented. You don't need foils at the back because the back hull planing surface serves that purpose well enough at higher speeds. The hulls would still benefit from a step like I showed because it will help the hulls get unstuck from the water quicker.
Yup, that is why flying boats and aircraft pontoons use them; they cause more problems than they solve.Tell me what does the step really do ??
why is it used ??
and what would happen if it wasn't used??
In the boating industry steps cause way more problems than they ever solve !!
very good !!Yup, that is why flying boats and aircraft pontoons use them; they cause more problems than they solve.
The step evolved through much experimentation to find a way to reduce hydrodynamic drag and to enable the airplane to rotate and break hydrodynamic suction.
Still waiting to see your "out of the box" improved design.
You might want to do a little research, and then think a little, before posting more comments.
no not at all!! the rocker is used to rotate the plane into the right position for take off !!Do you suppose all this sucking might make it difficult to take off? Yaaahahahaha
As have been pointed out, 70mph is above take of speed for many light airplanes. The stall speed requirement of an Light Sport Airplane is 52mph, typical takeoff speed is somewhat higher, but still less than your 70mph boat hull. At 70mhp the airplane is wing borne and flying, and the hull is out of the water.Its the tunnel between the hulls that's the key !! You are missing the point !! the hulls lift the boat at low speeds and when the speed gets to 50 mph plus then the air starts to take over and lift even more and so speed increases very quickly ! 70 to 80 mph and significantly the air had a lot of lift not only under the boat but also the vast existent of deck area produces quite a bit of lift as well !! To design a stable fast boat first you have to choose a foil to work with then superimpose the boat over the top retaining as much of the actual foil shape for the underside (tunnel roof ) and the upper parts as well !! simply it has to fly !!
No the boat in the picture was after time working with Scott but its the copy of a boat I wanted to make myself !!
If the boats wont reach 70mph plus I wasn't interested !!speed on water is something else !!