flipper
Well-Known Member
Do you think she dries out? What's that tab for at the back?
What is it and where is it?
- Thread starter flipper
- Start date
sailorman
Well-Known Member
Do you think she dries out? What's that tab for at the back?
Crusader & Foxs
Mandarin331
Well-Known Member
Yes, she would definately dry out on any suitable sand/mudbank.
Not sure she'd ever refloat though.
Wasn't it Dockerell made a cruising yacht with a keel like this - on the scary assumption that she would sit upright on it?
Not sure she'd ever refloat though.
Wasn't it Dockerell made a cruising yacht with a keel like this - on the scary assumption that she would sit upright on it?
Norfolknick
Well-Known Member
Trim Tab
The trim tab works much like that of a powerboats - it essentially allows you to carry more unbalanced thrust (and therefore more sail) without too much leeway.
It has an obvious problem of drag though and is now a very outdated idea (it was big on the 12's during the 80s). If I understand the physics correctly (and I'm a dumb Seaman Officer so I'm probably wrong) then because the trim tab is affecting the flow nearer the fulcrum point it can achieve a greater effect from a smaller movement (to achieve the same at the rudder you would need a lot more either angle or size - and thus weather helm).
The trim tab works much like that of a powerboats - it essentially allows you to carry more unbalanced thrust (and therefore more sail) without too much leeway.
It has an obvious problem of drag though and is now a very outdated idea (it was big on the 12's during the 80s). If I understand the physics correctly (and I'm a dumb Seaman Officer so I'm probably wrong) then because the trim tab is affecting the flow nearer the fulcrum point it can achieve a greater effect from a smaller movement (to achieve the same at the rudder you would need a lot more either angle or size - and thus weather helm).