Franklin, I think this discussion (rel supercavitation) has gone well beyond the topic of this thread,namely boats that use air lift, especially...
I give up. I don"t understand the theory or your intended implementation for planning craft enough to comment further and you dont seem disposed...
Torpedos, the last time I looked, were basicaly neutrally bouyant.They dont need much lift. They don't sink anyway.Whether super cavitating or...
I remember reading the Scientific American Article with great interest. Now I fail to see how lift can be generated by a fully submerged super...
This is one interesting thread even if it sometimes becomes a little sarcastic. When I was up to Lake Winipasauki N.H. the other week I visited...
The conversation on this subject has gotten much more practical. I would like to add a little more of such pragmatic thought. One of the ideas...
CDBarry---- Thanks for info. I am way past the "matching" phase. I have built a racing hydro and have purchased a custom made prop that is...
If one knows the prop shaft HP vs. shaft rpm* and the prop pitch,the theoretical thrust vs boat speed should be easy to calculate. Unfortunately...
This post has been arround a while, so I don't know if you got an answer yet or if you still want one. In any event,the dynamic pressure in...
Jim Boat As I was thinking about your list of variables relative to performance, it accured to me there is another parameter absent but no...
Jim Boat, Your "description" of the problem in the form of the list of "variables" is excellent and It is the most complete list I have seen in...
jimboat--- We are in total agreement as to "crux of the matter". It is as you say, a complex issue. I have done my studies through closed form...
In the class of boats we race, the planning element and the air lift element are one and the same.IE the bottom of the foil near the trailing edge...
jimboat and lucdekeyser, Thanks for your interesting comments on my post. The boat that I have designed and built has an actual AR of 1.4 and an...
TSPEER Thanks for reminding me one more time that Froude knew what he was doing. I believe you are correct that pressure is an impulse...
There has been a lot of discussion about the simultaneous application of both aerodynamic (WIG) and hydrodynamic forces and their interaction on...
DJ, Since the keels are attatched to the hull, of course the hull portion of drag is comon to all and in theory can be subtracted out.However this...
D. j .PIERROT Are you talking about displacement hulls, Planing surfaces or simply fully submerged objects. If I knew which one maybe I can help...
Wig Foxxaero, Once again you have missunderstood what I am saying. I don't wish to throw out the IMO definitions. My point is they don't...
Wig Foxxaero, We find ourselves deeply into philosophical discussions. I fear we are coming from two different directions.To help me...
