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3.2 - Froude's Experiments - Coggle Diagram
3.2 - Froude's Experiments
Slow Speeds
80 to 85% total resistance
High Speeds
Approx 50% total resistance
Important parcel of resistance
up to 50ft
Greyhound trials
Equivalent plank resistance
Ship with skin
similar to a plank with same area
Except low veloc
Número de Froude
\( Fr_n= \frac{u}{ \sqrt{gL}} \)
incógnitas
u
veloc relativa
entre NAV e mar
L
Comprimento NAV
Linha d'água
Speed-lenght ratio
Para Frouder legal, toca Uma, depois RaizGa eLa
ITTC Performance Committee
Form factor
Form influences
viscous pressure drag
Resistance
Reduces
increases length for same breadth
\( R=fSV^n \)
S - Area
V veloc
f and n
rougher surface - HIGHER value
Depends on length and nature
f
longer surface - LOWER value
Resistência é Frequente se Você Não lubrifica