Dinghy development: course setting

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course setting

Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13027
Printed Date: 18 Aug 25 at 1:05pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com

Topic: course setting

Posted By: Gordon 1430
Subject: course setting
Date Posted: 27 Mar 18 at 2:09pm

Hi All especially those with a technical brain.

On Monday we have a one of race designed to be a bit of fun, easter eggs as prizes etc.

As race officer I was thinking of extending the windward leg in groups to take out the handicap.

this if done correctly could end up with an almost all together finish.

They do something like this at Hill Head with the triangulation but normally its reaching legs.

So how do I work out the extra distance required slowest boat Topper 1358 - fastest 49er 697.

hopefully it will be the rs400 942

So working in groups of 100 py points and the furthest I would want to use being East Brambles at approx. 1 mile. race time set at 45minutes.

Any sensible help gratefully received.

Regards

Gordon

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Gordon
Phantom 1430

Replies:

Posted By: JimC
Date Posted: 27 Mar 18 at 2:39pm

You're going to need to measure your total course length, because this is a distance on distance handicap. I think I'd contact Hill Head and find out what formula they use, because I wouldn't be at all surprised if there's more to it than the obvious, but the obvious would be something like:

Extra Distance = (Basic Course length/PY * highest PY in use) - Basic Course Length

Because its a distance on distance handicap the best bet is to do several laps so you can shorten near your 45min target. Don't forget that as the typical spread in any fleet is around 20% your last finishers are still going to be about 20% later than your first one, they won't be any tighter bunched than a typical championship race.

Posted By: Sam.Spoons
Date Posted: 27 Mar 18 at 4:06pm

Can't you run it as a pursuit race, staggered starts and a line finish at the next buoy as the time limit expires?

Bear in mind that the difference between the Topper and 49er would mean the 49er would have to sail almost twice as far as the topper (or would start at zero mins and the 49er around 20 mins later

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"

Posted By: JimC
Date Posted: 27 Mar 18 at 4:21pm

I've done the triangulation a couple of times at least. The distance on distance handicap is a bit of a blunt instrument, but its great fun. You get a nice lead over that slow boat and then see him peel off and head back again and if a faster boat overtakes you you get all the time back as he has to head off over the horizon. A hell of a thing to organise I fear, but perfect for a lighter hearted one off race. I think last time I did it you had a streamer to put on your shrouds which matched a flag on the mark you had to go round.

Posted By: Gordon 1430
Date Posted: 28 Mar 18 at 12:44pm

Hi Jim

Thanks for the advice. As it is meant to be a bit of bank holiday fun I will take a wild guess based on your comments but with a slow boat bias (mostly kids and Trainees).

Yes HH still use the streamers and coloured buoys, but I think the methodology may be by wrote now rather than by any method as it did not alter the course when it was southerly wind not SW.

As you say its good fun though and definitely pays to be fastest in your group which is a sod as the Phantom is now in the same band as the 400.

Regards

Gordon

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Gordon
Phantom 1430

Posted By: craiggo
Date Posted: 28 Mar 18 at 6:54pm

Don't forget to allow for the tide!

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OK 2129
RS200 411