The Resistance and Propulsion Compilation of Project II-2 embodies the preparation and printing of three sets of sheets containing summaries of model test data and related data useful in the design of ships and propellers. These three sets have the following titles:
1. Resistance Data Sheets, abbreviated RD sheets
2. Propeller Data Sheets, abbreviated PD sheets
3. Self-Propulsion Data Sheets, abbreviated SPD sheets Group 1, beginning with sheet number 101 is a continuation of the series of Model Resistance Data and Expanded Resistance Data Sheets previously prepared and published by the Society, carrying sheet numbers I through 100.
In selecting the models for which Model and Expanded Resistance Data Sheets Numbers 1 through 150 have been prepared, an effort was made to include as wide a variety of ship types as possible. Most of these models were tested prior to adopting model basin techniques in which there is artificial stimulation of turbulence. Recent experience in model testing indicates that the resistance data of models of about 0.68 block coefficient and fuller should be accepted with some caution if tested without turbulence stimulation. This qualification applies to all usual model sizes in preparing additional Model and Expanded Resistance Data Sheets, beginning with RD sheet 151, only those models believed to be free of laminar flow will be selected.