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Tacking |
| Message #940 by: |
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| Posted on: |
Monday 5th of July 2004 at 7:16 am |
what are the cew actions and the helmsman's actions during a tack in about 15 knots wind with swelly seas?as of now (just to avoid those nasty nose up capsizes)we've been dpoing it this way:
Helm:
1. goes in
2. then bears in and eases the main a bit.
3. Gets on the other side ond hooks on.
Crew:
1. (asthe helm goes in) goes aft on the wire
2. eases the jib (to help the bow swinging in to the wind)
3. as the boat goes through head to wind, crosses over and sheets the jib in then takes over the main and the traveller.
4.hand over the main sheet and keeps the traveller.
This is how we've been doing it.but,dont want to develop any bad habits.any chance i can get a step by step procedure how to go about it?we dont have anyone to see and learn over here....
Also,i was just going through the class rules where it says that adjustable Trapeze wires are permitted.Do most people use them?are they better of?do they use the same system as a 420?
What about foot straps on the side bars?are they allowed and good in especially rough seas?
can you suggest some techniques to improve boat handling?(e.g.in the 420's,we used to sail with the rudder blade up)
Thank You very much!
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Training |
| Message #944 by: |
Dave Cooper |
| Posted on: |
Tuesday 6th of July 2004 at 12:59 pm |
I am sure one of the youths will put you right. Would be good for you to get to the training session this weekend
Dave |
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Please help |
| Message #947 by: |
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| Posted on: |
Tuesday 6th of July 2004 at 6:54 pm |
| i really wish i could,but i'm not in the UK,so i cant attend the training sessons.if i were,id be the first to sign up.Any tips? |
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Tacking |
| Message #949 by: |
Bobby G |
| Posted on: |
Monday 12th of July 2004 at 12:20 am |
Helm goes in. Do not ease the main until you are head to wind.
Crew does not ease the jib until it has filled on the other side and the the cat has fully tacked.
Some Hobie sailors sail with one rudder blade up. It is not seamanlike and there is no gain.
Buy a modern cat and you will not have any problem tacking ! ! ! |
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rudder up |
| Message #950 by: |
beg to differ.... |
| Posted on: |
Monday 12th of July 2004 at 11:32 am |
Whilst not a Hobie sailor anymore, i would suggest that
the 'rudder up' scenario does offer a gain and is not
'unseamanlike' in the right hands.
Raising a rudder will only pay if the boat is in very good
order, and all cams etc are functioning properly. On top
of that, you need a skillful helmsman to avoid losing out
in tacks and gybes.
Hobie rudders are ideally set tow'ed out. lifting one
reduces drag of foils by 50%, and will pay off both
upwind and downwind in the right hands.
If you lose a leeward rudder at any speed, due to it
popping up at an obstruction, your windward rudder, as
most will have experienced, is virtually useless at
controlling the boat, therefore negating the
'seamanship' comment.
Bobby G, back to your Westerley caravan cruiser! |
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rudder up? |
| Message #996 by: |
maybe....... |
| Posted on: |
Saturday 14th of August 2004 at 1:11 am |
| I think the theory now stands that there is no real gain to be had by sailing with a rudder up.The drag of a rudder is only very slight anyway,and the rudders can actually help smooth the flow of water leaving the transoms.Regarding toe-out on rudders,this is known as 'the ackermann effect' and has been all but disproved.Rudders will cause drag unless they're properly aligned with each other.The toe-out theory is based on the outside hull having to travel further when turning the boat,but what's the point if it's dragging all the time you're going in a straight line? |
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toe out |
| Message #1000 by: |
Nonsense!!! |
| Posted on: |
Monday 16th of August 2004 at 8:56 am |
the toe in/ out of rudders has nothing to do with the
ackerman effect.
The ackerman effect relates to any vehicle with two
turning wheels / rudders etc.
ALL cats use this - it is the bend in the tiller bar inboard
from the rudder before connecting to the cross bar.
when going straight - rudders are straight - when
turning, one turnsmore than the other.
The permanent toe-in discussed previously has not
been disproved. It is due to the assymetric shape of
the hobie hulls. the water leaves the two sides of the
hull at different angles, combining into a trailing wake
just off centre. the toe of the rudders aligns with this
stream, and thus travels 'straight' through the water.
Colby doea this, along with everyone else, and it
doesn't seem to slow him up much.
do a little research on the ackerman effect! |
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