| VESSEL
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| VOYAGE NO.
: 2004 - 09 |
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| DATE
: JUL. 18, 2004 |
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| WINCH BRAKE TEST FORM
( BHC ) RENDERING |
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(1) |
(2) |
(3) |
(4) |
| WINCH |
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BRAKE CAPACITY |
| POSITION
NO. |
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R(cm) |
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D(cm) |
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P(kg/cm2) |
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(Tons) |
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| FWD PORT(NO. 1) |
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17 |
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59 |
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220 |
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33.74 |
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| FWD STBD.(NO. 2) |
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17 |
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59 |
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300 |
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46.02 |
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| AFT PORT(NO. 3) |
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17 |
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59 |
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270 |
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41.41 |
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| AFT AFT.(NO. 4) |
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17 |
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59 |
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270 |
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41.41 |
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| AFT STBD.(NO. 5) |
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17 |
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59 |
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300 |
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46.02 |
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| Column
(1) R : Distance between centre of
drum and first layer of rope. |
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| Column
(2) D : Distance between centre of
drum and jack.. |
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| Column
(3) P : Pressure reading when drum
begins to drift (must be read-off during test) |
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| furthermore,
A : Piston area of jack (given in jack specification in cm2) |
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44.2 X D(2) X P(3) |
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| Column
(4) Brake Holding Force = A X (3) X (2) = TONS |
(1)
X 1000 |
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| The
result in Column 4 should equal to the required brake force and a mark
attached to the brake screw handle |
| stating
the degree to which the brake handle screw must be fastened to obtain the
required brake force. If the |
| result
in column 4 is different from the required,the brake may be re-adjusted and
the test repeated until the |
| required
brake force is obtained,and the corresponding screw tighness marked. |
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| WORKED
EXAMPLE : |
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| Given that
the distance D (I.e. distance between centre of drum and jack) is D = 59 cm |
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| and R =
17cm (I.e. distance between centre of
drum and first layer of rope) |
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| once the
above measurements for D(cm) and R(cm) have been taken,and the brake screw
tightened ,the force |
| applied
by the jack may be gradually
increased. |
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| If the
pressure reading just before the brake begins to slip is say P = 160 kg/cm2 |
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| Also,assuming
that the piston area of the jack ,as is the case on the "EIRINI
L",IS A = 44.2 cm2 |
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| then
, F(TONS) = 44.2 x 220 x 59 =
33.74 TONS |
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17.0 X
1000 |
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| CHECKED BY
: |
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M
A S T
E R |
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