Power used in working engines and shafting.
0-67




2-46


} , ,, the friction of load.
1-99




7*31


,, ,, ,, ; , the screw


1'46




5*36


, , expanded in producing thrust


23'10


27*22


84*87



Table XLIV.— Eesults of Trials with Screws A, E, and F,
showing eelation between indicated thrust and power
Expended.
Speeds in Knots


J 50

i


5-5


6-0


6-5


7-0


7-5


8*0


8 5


Thrust on dynamometer


3154


368-8


449 9


560-6


707-0


8671


990-7


1082-4


Tow-rope tension . . lbs.
315-5


378-0


453-6


538-0


631-0


718-0


813-0


914-0


Revolutions per minute


' 10713


118-54


130-03


141-69


153-78


167-48


182-30


196-50


Slip per cent.
7-82


8-37


8-87


9-40


10-10


11-56


13-33


14-57


I.H.P. for propulsiou


, 4-847


6-235


8-297


11-200


15-211


19-99


24-361


28-280


,, slip


0-411


0-569


0-808


1-171


1-709


2-613


3-747


4-823


Propulsion and slip


■ 5*258


6*804


9105


12 371


16-920


22-602


28-10S


33-103


Thrust H.P.
I 5*257


6-805


9115


12*350


16 '910


22-580


28-100


33-100


Calculated thrust . lbs.
, 375-


■■












1250



Table XLY. — Showing Pressures on Pistons due to Reaction
of Screws at Various Speeds. Screws 4'33 feet diameter
x 5-136 feet pitch.
Screw.
A, E and F
B
C
I)



Surface in Feet.
Helical. Projected.
6132
4-808
3-066
1-742



Speed of Ship in Knots per Hour.
5 '195
4-073
2-598
1-476



8-5


80


7-5


70


6-5


c-o


5-5


59*076


54-073


47-330


38-584


30-622


24*556


20-129


59-074


54-071


47311


38*588


30-599


24-558


20*129


59-085


54-007


47-328


38595


30-382


24-590


20-091


59-260


54-085


47-334


38-583


30-670


24-555


20-134



Showing Pressures on Pistons due to Reaction of Screws at Various Speeds
Screws 4 '33 feet diameter x 7 "0 feet mean pitch.
