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Boats for sale
| Rossiter Pintail Mortagne sur Gironde, near Bordeaux |
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| Laser 28 - Excellent example of this great design Hamble le rice |
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List classes of boat for sale |
Effects of tide on boat speed |
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Sam.Spoons 
Really should get out more 
Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3400 |
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 Topic: Effects of tide on boat speedPosted: 18 Nov 19 at 9:37pm |
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Must have been the lee bow effect then  I was one of the two boards and there was enough wind not to need to pump. And, anyway, back then pumping was illegal even on windsurfers. Later on, if there was no wind, on Raceboards we'd just pump 'dead downwind' in any direction, I reckon I could make 2 or 3 knots in a flat calm*. * Coming from a dinghy background I was fiercely opposed to legalising pumping on windsurfers but when it became a 'fait accompli' I just learned how to do it (and got quite good at it too).
Edited by Sam.Spoons - 18 Nov 19 at 9:38pm |
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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davidyacht
Really should get out more
Joined: 29 Mar 05 Online Status: Offline Posts: 1345 |
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Posted: 18 Nov 19 at 9:28pm |
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Of course tidal gates can allow fast boats to get past points where slow boats can simply not get past!
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Happily living in the past
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Rupert
Really should get out more
Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
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Posted: 18 Nov 19 at 7:34pm |
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In terms of improving accuracy of tidal yardstick, I'd have thought a combination of varying tidal venues will be more accurate than having non tidal venues still in there. For inland venues, removal of tides will also be more accurate, even looking at Rutland and Shearwater, judging by the comments on this thread.
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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eric_c
Far too distracted from work 
Joined: 21 Jan 18 Online Status: Offline Posts: 382 |
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Posted: 18 Nov 19 at 7:22pm |
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Since they pump their way up wind, when it's calm, it's their choice which tack to be on? Either that or one was 'leebowing' with some sort of divide by zero (tide) error? Makes as much sense as anything else on that subject....
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tink
Really should get out more
Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789 |
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Posted: 18 Nov 19 at 7:14pm |
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When I win the lottery I am going to fly 100s of drones over the lake with sensors and analyse the wind for a few weeks.
Or perhaps move to some tropical island..... Obviously somewhere without tides  Edited by tink - 18 Nov 19 at 7:15pm |
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Tink
https://tinkboats.com http://proasail.blogspot.com |
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Sam.Spoons
Really should get out more
Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3400 |
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Posted: 18 Nov 19 at 6:47pm |
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I experienced similar on Bala, two Div 1 Windsurfers, 30 yards apart, sailing exactly the same course upwind on opposite tacks.
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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tink
Really should get out more
Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789 |
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Posted: 18 Nov 19 at 6:36pm |
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Actually at Ullswater off the point between Sharrow bay and the club
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Tink
https://tinkboats.com http://proasail.blogspot.com |
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ohFFsake
Far too distracted from work
Joined: 04 Sep 08 Location: United Kingdom Online Status: Offline Posts: 219 |
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Posted: 18 Nov 19 at 6:32pm |
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Haha yes - used to happen a lot at South Windermere.
Not so much since I moved to Ullswater where the wind is "steady"  |
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Sussex Lad
Far too distracted from work
Joined: 08 Jun 18 Online Status: Offline Posts: 360 |
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Posted: 18 Nov 19 at 6:30pm |
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Lol......no thanks,
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tink
Really should get out more
Joined: 23 Jan 16 Location: North Hants Online Status: Offline Posts: 789 |
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Posted: 18 Nov 19 at 6:25pm |
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Ah but have you ever seen symmetrical spinnakers perfectly set on a dead run
on two boat less the 50 foot apart on reciprocal courses |
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Tink
https://tinkboats.com http://proasail.blogspot.com |
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