The tests have been conducted applying the method of comparative towing tests of the hull

C.77-132,a model with a floating lenght Lwl = 2,584 m and wet surface WS model = 1.154 m²

The tests have been made at towing speeds that could generate numbers of Reynolds superior
to 1*106, such as to permit a turbolent flow around the hull.

The model has been towed, applying and without applying Acquablitz® , at different speeds.
The obtained experimental values of the two situations have then been compared.
Hereafter we make a presentation of the measurable results by scaling the data obtained on
the foresaid model to a hull with the same features and a lenght of 10,33 meters ( ratio 1:4).

Lwl model = 2,584
Lwl boat = 10.33 ( ratio 1:4)

Drawing Rr from the well known formula that expresses the coefficient of residual resistance Cr
we obtain :
RR = CR * ρ/2 * WS * V²
Where
RR = residual resistance(value to be determined, which depends on the drag viscous component)
CR = coefficient of residual resistance (experimental values obtained during the towing tests)

ρ = water density at a given temperature (for t = 24° ρ = 104,621)
WS = wet surface of the hull [WS model = 1.154 m²; WS boat = WS modell * (scale factor)²]
V = meters/second speed of the model; V boat = V * ( scale factor )1/2

Calculating the RR boat referred to the hull treated with Acquablitz® by the couple of experimental values V = 1,2952 m/s e CR = 2,1347*10-3 we obtain RR boat= 13,835 kg

Calculating the RR boat referred to the hull NOT treated with Acquablitz® by the couple of experimental values V = 1,2952 m/s e CR = 2,2755*10-3 we obtain RR boat = 14,670 kg

Kg 14,670 – Kg 13.835 = Kg 0.835 ( 6% )

THE TREATMENT WITH Acquablitz® HAS REDUCED THE RESIDUAL RESISTANCE, ASSOCIATED WITH THE DRAG VISCOUS RESISTANCE, OF 6%.

The report by the Naval Laboratory Dept. of Trieste University concludes that at higher rates of Reynolds (RN) (which means in actual conditions) the effect of Acquablitz on drag reduction may be even higher than in laboratory, as in real movement conditions the turbolence flow is generating numbers of RN which are varying from 1*108 to 1*109, thus much higher than those ones obtained in laboratory