Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[mikew]

Good Morning All


I have just started to transfer the measurements for the cut outs on the hull shaft/rudder etc. from the RNLI drawings that I have and find that the rudder posts do not fall directly in line C/L to C/L but in fact the rudders are to the outside of the shaft C/L,.


Can anyone tell why this is so, is it to aid turning and if so would/should I use CW and CCW props ???   


Regards
Mike

[Netleyned]

Probably to facilitate removal of shafts
without disturbing rudders/steering gear.


Ned

[gribeauval]

The offset is standard practice for RNLI lifeboats. As Ned said it enables the shaft to be removed when needed without dismantling the rudder gear. The props need to be a 'handed' pair and should rotate outwards for forward propulsion when viewed from the stern.

Mike

[mikew]

Ned, Mike


Thank you both for that, how simple it seems when you know the answer.


Handed props it is then.


Mike

[BFSMP]

CW and CCW props ??? 

what are they, please.


Jim.

[mikew]

Clockwise & Counter Clockwise, Left & Right

[SailorGreg]

The props need to be a 'handed' pair and should rotate outwards for forward propulsion...

Perhaps I am a little slow, but does this mean the top of the prop is moving outwards or the bottom?


And what difference does it make?


Greg

[BFSMP]

Clockwise & Counter Clockwise, Left & Right

duuurrrrrr.................I sound so stupid now, just can't get used to acronyms at my age,


thanks mike.