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Clean wind or favoured tack?
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Grumpycat View Drop Down
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    Posted: 07 May 22 at 3:55pm
Originally posted by A2Z

Originally posted by sawman

Originally posted by Grumpycat

Originally posted by A2Z

Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.


Oh come on lol. If you cannot come out of the tack faster than you went in , there is no point doing it  LOL Wink

theres always someone who is rubbish at roll tacking blathering on about rule 42 Wink

in this situation, it would be reasonable to return to the speed you had before getting stuck in dirty air - so not gaining speed, more returning to previous speed.
 No, it’s reasonable that  “just after the tack or gybe is completed, the boat’s speed is not greater than it would have been in the absence of the tack or gybe.”.  You can’t use the tack to get to accelerate you, so there are no “kinetic benefits” to be had, at best there is still some loss as there will be speed (and distance)  reduction in the turn that can’t be compensated for.

It might ‘ reasonable’ . But every dinghy sailor from reasonable club sailor to world champions does come out of the tack quicker . Smile
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sargesail View Drop Down
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Posts: 1459 		Post Options Post Options   Quote sargesail Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 1:21pm
Originally posted by A2Z


Originally posted by sawman


Originally posted by Grumpycat


Originally posted by A2Z


Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.

Oh come on lol. If you cannot come out of the tack faster than you went in , there is no point doing it  LOL Wink

theres always someone who is rubbish at roll tacking blathering on about rule 42 Wink
in this situation, it would be reasonable to return to the speed you had before getting stuck in dirty air - so not gaining speed, more returning to previous speed.

 No, it’s reasonable that  “just after the tack or gybe is completed, the boat’s speed is not greater than it would have been in the absence of the tack or gybe.”.  You can’t use the tack to get to accelerate you, so there are no “kinetic benefits” to be had, at best there is still some loss as there will be speed (and distance)  reduction in the turn that can’t be compensated for.


So right and yet so wrong! The legal gain in a roll tack is in improved VMG during the tack. Ie when pointing upwind. If the return (and no more) to entry speed is efficient then a big gain is available. So kinetic gains mischaracterises the mechanism of gain, but the mechanism dos rely on good kinetics.
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Guests View Drop Down
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 1:11pm
Originally posted by sawman

Originally posted by Grumpycat

Originally posted by A2Z

Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.


Oh come on lol. If you cannot come out of the tack faster than you went in , there is no point doing it  LOL Wink

theres always someone who is rubbish at roll tacking blathering on about rule 42 Wink

in this situation, it would be reasonable to return to the speed you had before getting stuck in dirty air - so not gaining speed, more returning to previous speed.
 No, it’s reasonable that  “just after the tack or gybe is completed, the boat’s speed is not greater than it would have been in the absence of the tack or gybe.”.  You can’t use the tack to get to accelerate you, so there are no “kinetic benefits” to be had, at best there is still some loss as there will be speed (and distance)  reduction in the turn that can’t be compensated for.
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sawman View Drop Down
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Posts: 205 		Post Options Post Options   Quote sawman Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 12:50pm
Originally posted by 423zero

Couple of good pumps too

if you have got it, flaunt it....
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sawman View Drop Down
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Posts: 205 		Post Options Post Options   Quote sawman Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 12:49pm
Originally posted by Grumpycat

Originally posted by A2Z

Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.


Oh come on lol. If you cannot come out of the tack faster than you went in , there is no point doing it  LOL Wink

theres always someone who is rubbish at roll tacking blathering on about rule 42 Wink

in this situation, it would be reasonable to return to the speed you had before getting stuck in dirty air - so not gaining speed, more returning to previous speed.
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423zero View Drop Down
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Posts: 3420 		Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 9:29am
Couple of good pumps too
Robert
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Grumpycat View Drop Down
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Posts: 497 		Post Options Post Options   Quote Grumpycat Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 9:16am
Originally posted by A2Z

Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.


Oh come on lol. If you cannot come out of the tack faster than you went in , there is no point doing it  LOL Wink
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423zero View Drop Down
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Posts: 3420 		Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 8:59am
Bit of ooching to follow
Robert
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Guests View Drop Down
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 8:50am
Originally posted by sawman

 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
I refer the honourable gent to rule 42.
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sawman View Drop Down
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Posts: 205 		Post Options Post Options   Quote sawman Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 22 at 8:38am
 Tack, tack back - parallel lane to the original, enough gap to break dirty air, and the kinetic benefits of 2 roll tacks 
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