The results of the test programme performed on the sailing yacht 1:3 scale model C.2441, of the America's Cup Class (ACC) are presented. The tests were performed to determine the TH21B sailing yacht hydrodynamic characteristics in calm water towing conditions. The model belongs to the latest generation of hulls designed for the America's Cup 2003 PRADA Challenge, in order to choose the best hull to race. The experimental technique used is the so called partially restrained model. The model is free to heave and pitch, but restrained in the other motions. The test programme on the model fitted with the mobile standard appendages includes Appended Upright Tests, a reduced matrix of Appended Heeled and Yawed Tests with trim variation and Unappended Tests. Since the ultimate goal is to produce a performance merit list among hulls and/or configurations even with small mutual differences in shape, the accuracy of the experiment also reached values up to 0.5%.
Sono presentati i risultati del programma di prove eseguiti sul modello in scala 1:3 di barca a vela C.2441 (TH21B) di Classe Coppa America, al fine di determinarne le caratteristiche idrodinamiche al rimorchio in acqua calma. Il modello appartiene all'ultima generazione di scafi disegnati per la sfida di PRADA alla Coppa America 2003, al fine di scegliere il miglior scafo da far gareggiare. La tecnica sperimentale utilizzata è quella del modello parzialmente vincolato. Il modello è libero nel moto di sussulto e beccheggio e vincolato in tutti gli altri moti. Sono state effettuate prove sul modello, allestito con le appendici standard mobili, in assetto dritto, una matrice ridotta in assetto sbandato con angolo di deriva, ma con l'aggiunta di variazioni d'assetto longitudinale e su carena senza appendici. Essendo l'obiettivo finale quello di effettuare graduatorie di merito anche tra scafi e/o configurazioni con piccole differenze di forma, l'accuratezza della sperimentazione ha raggiunto valori anche dello 0.5%.
Tank tests on ACC Yacht models for PRADA Challenge 2003, TR No. 1/C2441
2002
Abstract
The results of the test programme performed on the sailing yacht 1:3 scale model C.2441, of the America's Cup Class (ACC) are presented. The tests were performed to determine the TH21B sailing yacht hydrodynamic characteristics in calm water towing conditions. The model belongs to the latest generation of hulls designed for the America's Cup 2003 PRADA Challenge, in order to choose the best hull to race. The experimental technique used is the so called partially restrained model. The model is free to heave and pitch, but restrained in the other motions. The test programme on the model fitted with the mobile standard appendages includes Appended Upright Tests, a reduced matrix of Appended Heeled and Yawed Tests with trim variation and Unappended Tests. Since the ultimate goal is to produce a performance merit list among hulls and/or configurations even with small mutual differences in shape, the accuracy of the experiment also reached values up to 0.5%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
