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Neutral
The output shaft [2] connected to the propeller shaft does not transmit any rotation.
The clutches are disengaged.
Engine rotation (1
The output shaft [2] connected to the propeller shaft rotates in the same direction as the input
shaft [1].
Counter engine rotation (1
The output shaft [2] connected to the propeller shaft rotates in the opposite direction to the input
shaft [1].
Fig. 3.1
E.R.
= direction of rotation same as direction of rotation of engine
C.E.R. = direction of rotation opposite to direction of rotation of engine
The transmission ratio, for both the engine and counter-engine rotation modes, is stated on the
identification plate. The three types of operation are controlled by the control valve [3] (mechani-
cal or electrical).
st
Operation in 1
The drive boss [4] rotates at the same speed and in the same direction as the
input shaft [1] (Ratio 1:1)
nd
Operation in 2
The drive boss [4] rotates faster than the input shaft [1] .
The direction of rotation is the same as the input shaft [1].
st
Operation in 1
and/or 2
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st or
nd
2
speed)
st
nd
or 2
speed)
speed
speed
nd
speed is controlled by the electrical control valve [5].
7
GB
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