KJF then presented the result of his work in graphical format (N―117).
65 boats from 5 countries were calculated,
37 of them were power boats,
28 of them were sailboats
58 of them were FRP boats.
He had to deal with several inconsistencies:
- material properties for FRP were directly taken as supplied, calculation based on the old formula,
- Iocal canoe body draft missing in the data sheet, TC taken from calculation
- some side panels have zero height above bottom/side limit,
- in some cases material data were missing,
- wrong units in one occasion, corrected,
- thicker inner sandwich skin than outer, not corrected,
He explained the new setup of the spreadsheet:
- 1 sheet only for the formulae
- 1 workbook for 1 country
which will facilitate work.
The principle results are as follows:
Bottom - sailboats: o.k.
Bottom - power boats: o.k.
Side - power boats: most of the boats do not meet requirements
Side - sailboats: most of the boats meet the requirements, but not all of them.
Sandwich construction : The requirements are very low as to the section modulus (SM).
Attained values are usually far beyond requirements. This is
mainly due to very thick cores. Panels are usually not optimised.
KJF will check if our assumptions are in line with other rules.
The results of the calculations are displayed in a series of graphs that were distributed to members.
5.2 Changes to Doc. N-113
There were several editorial changes made:
Fig. 2a, 2b: Description
Tc to be incorporated into formula (8)
- Fast sailing craft: To be a separate and numbered paragraph
- Fig. 9: Arrows to the right places
- Formula (15): Factor 4 inserted again (misprint)
- Clause 5.3 : Addition of a note
- Figures for bulkheads (Fig. 10 and 11 ): To be numbered. Inscription changed
