Traiisacrioiis Socirly Xa'iVl Archilrcls and Marine liutiinccrs. I'lil. 2j, ipip. 



Plate 42 



To illustrate paper on "Non-Rolliju/ Tasseju/er /.iiiers — Observations ou a Large Stabilised 

 Ship ill Service. IiicludiiKj the I'Uiiit aiKlJicoiioiiiies Effected by Stabilisation," by Elmer 

 ./. S perry, Esij., Member. 



Fig. 1. — Some of the Thousands of Feet of Records 

 Used in Studying Ship Stabilization. 



Fig. 2. — Original Active Stabilizer Installed on 

 Destroyer Worden. 



Path cut thru water by stabilized vessel. 



: m ',.j jj/ -I ^•. .-D^ . V .'/y^^^Ayy/fWfv/: 



'■ -en the vessel is not stabilized it cut5 a wider path as indicated above. 

 ; :.^ sbaded area indicates proportional increase in power. 



Further increase in power is required when the ves.'sel yaws. 



The constant use of rudder abaorts power and tends to ralard the vessel. 



Fig. 3. — Losses Due to Helm, Rolling, and Sinuous Course 



