A sharp bow (pointy and about vertical shaped) entrance angle is one of the factors which reduce resistance in displacement end pre-planing...
going on Thinkdesign par. CAD3D+SUPHAD hull analysis+COSMOS FEA composites K.
Going on using Thinkdesign 3D par. CAD and SUPHAD (beta v.1.6.2) for hull dynamic analysis.
Yes, You are right, Fastwave, I agree, that's the reason why we made trials on a small model, it was easier to change and test different mass...
interesting... We built and succesfully tested a stepped hull of 12' lenght many years ago (1996), inside a R&D program made just to invetigate...
Have a nice 2014! Going on with Thinkdesign3D parametric CAD, CosmosM FEA for composite structures, Suphad for planing and stepped hull...
Around 1906-1908 William Fauber obtained a US Patent for multi-step planing hull with steps ventilating air ducts, some water-based airplanes...
I guess dimensionless nr. should always be used, when applicable. I think the best dimentionless nr. to account for relative speed is the Froude...
why instead of "fussing and fighting my friends" do not we try to work in the direction to achieve conventionally a common technical and practical...
Hi, happy to see "best trim" item... best trim angle is one of the most important parameters to take in account for, just since very first...
Nothing changed: Thinkdesign+SUPHAD have a nice 2013! K.
That's right Joakim, we deal with stepped hulls, specially single-step one, and one of the targets is to match, for example, low overall trim...
I substantially agree with response 4.3. Even if different hull shapes could have a slightly different behaviour (depending on a lot of factors:...
Sorry, nothing in Spanish or French. Anyway, did You check all threads on forum about the matter? May be You can find out the right way......
imo, they actually realized a sort of "swept back step": http://www.foils.org/02_Papers%20dnloads/Clement%20dynaplane.PDF...
Well it seems an old post... but It could be seen also: http://aeromarineresearch.com/index.html and http://www.idet.it/idra.html K.
No fantasy nor magicians are needed, it's just a matter of physics. Like all physics phenomenons, it must be faced rationally and deeply. Many...
Hi, check some thread here in the forum, may be some idea and general info could be found:...
It's a famous and complete series of towing tank tests on parent planing hulls model with sistematic variation of aspect ratio (5 models), tested...
Hi, try to get this paper: "Resistance tests of a systematic series of planing hull forms", SNAME Trans. 1963, 71, 491-579. 13, Clements, J. C.,...