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Augment of Resistance and Thrust Deduction - Coggle Diagram
Augment of Resistance and Thrust Deduction
Augment of Resistance
Increase of resistance
from a towed model
to a propelled model
vanish of resultant foward resistance at stern
Resistance Augment Fraction
\( \alpha=\dfrac {T-R_T}{R_T} \)
\( T=(1+ \alpha)R_T \)
Resistance Augment Factor
\( (1+ \alpha) \)
\(R_T\) - Resistance Towed
\(T\) - Thrust. Maior que Rt
Seeing from other perspective
Loss of Thrust
Thrust Deduction
Fraction
\( t=\dfrac {T-R_T}{T} \)
\( R_T=(1-t)T \)
Thrust Deduction
Factor
\( (1- t)=\dfrac{R_T}{T} \)
Aumenta o FRACTION
Perde eficiência
Diminui o FACTOR
Maior diferença entre Rt e T
Usually without appendage
Some tests with rudder
Appendages
increase resistance