This program was awarded Calculator.com's Hot Calculator award in May of 1998

The following calculator is based on the equations and formulae in chapter 3 of "21st Century Multihulls" by Joseph Norwood Jr., available from Multihulls Magazine

Chapter 3 of "21st Century Multihulls" deals with hull resistance. 

The aim is to derive simple mathematical formulae for the design of minimum-resistance hulls. The formulae can be used either for non-planing displacement hulls or for multihull outriggers. It is assumed that the front section has semi-elliptic plan and exponential profile, while the rear section has exponential plan and semi-elliptic profile. The theory may not be valid for sections which differ significantly from this. The theory divides the hull into 2 sections of equal volume (but usually different length), makes calculations for each half, then adds them together.

The theory and equations are copyright to Joseph Norwood

The Java program is copyright to Fiona Sinclair e-mail to:fsinc@globalnet.co.uk

Please wait patiently until a blank rectangle appears, then fill in the boxes and press Calculate.

SORRY THIS PAGE IS UNDER CONSTRUCTION

To run this off-line, you need to download the following:

Fred.class, Diagram.class, Gadgets.class, Matrix.class, Paper.class, Spread.class, Wireframe.class

PLEASE send Fiona Sinclair some user feed-back.

To all the people who ask why Fiona calls it fred.java: It was named after Fred Schurch, who read the book but could not cope with the mathematics, then (very sensibly) mailed a discussion group asking for help. This program is dedicated to all other people who are in a similar situation.