Hello, I just want to know what exactly are “BONJEAN AND HYDROSTATIC CURVES” (definitions) and also what are they used for I mean. For more accuracy and larger trims the Bonjean curves can be used. If the end draughts, distance L apart, are observed then the draught at any particular. bonjean curve. Tonnes Per Centimetre Immersion (TPC) For each waterplane the area defines, for a given density of water, the change in buoyancy in tonnes is.

Author: Togul Nataur
Country: Myanmar
Language: English (Spanish)
Genre: Career
Published (Last): 9 May 2017
Pages: 14
PDF File Size: 13.30 Mb
ePub File Size: 9.15 Mb
ISBN: 727-6-72279-348-3
Downloads: 66048
Price: Free* [*Free Regsitration Required]
Uploader: Mozil

Learn More about Bonjean curves.

Subscribe to America’s largest dictionary and get thousands more definitions and advanced search—ad free! Moment to Change Trim One Metre MCT buoyancy will be created at the end of the ship at which the draught increases and a loss of buoyancy at the end which emerges from the water.

From the aggregation of such inundations at two representative waterlines curvse the elapsed time between them, it would be possible to compute a rate of inundation and thereby arrive at a notional aggregation of the areas of all the breaches in the cirves.

Considering the infinitely variable conditions of lading of such as a tweendeck or cuurves hold containing general cargo, once you get past the design stage ‘permeability’ must border on curvves guesswork.

Wilding probably took recourse to Bonjean curves because the soundings book did not survive to help him, curvss assuming it was filled in the damage control soundings probably arrived at the bridge on such as the back of a fag packet in the time-honoured manner.


They are normally plotted as a fair cure on a profile of the ship. A very useful set of curves can be produced based on the hull form. Note that the above does not purport to be a definitive or complete exposition of the concept or the procedures.

What are bonjean and hydrostatic curves?? | Boat Design Net

What cjrves the area? It was this second set of calculations that became the basis for his famous “12 square feet” estimate curvds the damage. No, create an account now. Free hydrostatic software for Mac Rosco99Oct 7,in forum: This can only be a brief response to various representations of Wilding’s 12 sq. If the trim change is one metre between perpendiculars, the moment is referred bonuean as the moment to change trim one metre MCT. The significance of this is that Wilding used a standard method technique of naval architects as the basis of his calculations.

Resources for Bonjean curves Time Traveler! What are the advantages of registering under a flag of convenience? Definition of Bonjean curves.

I can get the inflow per square foot per minute, and by dividing the one by the other I can get the square feet. Bedford and Hackett calculated 9.

The name, as far as I can ascertain, originates in Provence and should be accorded the French pronunciation. Bonjean curves form part of the set of hydrostatic curves provided to the vessel by the builder. It rises and curves forward on the profile, indicating the transverse area of the hull at that location on the hull. In effect, a “fudge factor. For the engineering types on the board, could someone provide me with a concise and understandable explanation of the Bonjean Curve Method as it applies to Edward Wilding’s calculation of 12 square feet of aggregate hull openings?


If the ship trims through a small angle about a transverse axis through the CF, the volumes of emerged and immersed wedges will be equal and the overall displacement remains unchanged. Beaufort wind scale Force 6.

Your name or email address: You can not facilitate what is not possible. As for the curvaceous M. In my previous post I omitted to mention that the immersed volume is derived from the length of the horizontal ordinates related to some concomitant scale. We have seen that for small changes in trim about the CF, there is no change in overall displacement.

Bonjean Curve Method

They are important in defining the heights of the transverse and longitudinal metacentres above the centre of buoyancy. Most of this information is covered in basic texts on naval architecture. From the outset he would have know that the Titanic’s floodable length had been exceeded.

Yes, my password is: