Devotti Single Hander |
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Topic: Devotti Single HanderPosted: 03 Oct 09 at 8:32pm |
Hi Mike, Gonna take a rain check on Sunday mate, gonna race at QM instead, got a few tweeks to do before racing wont have time to do that and drive to Burf. See you soon Tim Just posting to the blog |
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Nick Peters
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Joined: 08 Feb 06 Location: England Online Status: Offline Posts: 192 |
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Posted: 02 Oct 09 at 11:56pm |
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Daniel - perfect timing - I was just reading this thread and wondering where the RS100 and D1 PY's would end up: I have always come up with a TN after lots of sailing against known benchmark boats - still a bit early for the 100 to put a firm marker in the sand - and I am certainly not that clever (or geeky!!) to tackle the calcs. What data were you using? Latest RS100 data: Beam 1.85 / wl length 4.25 / all up sailing weight 80kg (hull 55kg) / upwind sail area 10.25m / downwind sail area 22.75m. (both big main) Vareo experience would indicate these boats might struggle on short reachy club courses and therefore not actually acheive a theoretical PY. My gut feel was that both would be higher (slower) than Daniels fine calcs. Time will tell. Does anyone know - Rodney? - figures for the D1 - bearing in mind the different rack settings etc. In Y/Y, Andy Rice wrote the hull excl wings is 60kgs - was that meant to be incl wings? Nick
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Nick
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Daniel Holman
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Joined: 17 Nov 08 Online Status: Offline Posts: 997 |
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Posted: 02 Oct 09 at 10:07pm |
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Using my geeky sh*t and with the Vareo number of 1038 (WL?) As a decent like for like baseline I get:
D1: 950 RS100 (Big Main): 990 RS100 (Small Main): 1015 This is using: ((0.4*(3188*(Length^-0.7775)))+(0.05*(709.06*((Total Displ/Length cubed)^0.346)))+(0.4*(2266.4*(Righting Moment^-0.3661))+(0.1*(868.5*(Upwind Sail Area^-0.2962)))+(0.005*(918.43*(Downwind Sail Area^-0.2208))))- (0.4*(0.4*(3188*(Length^-0.7775)))+(0.05*(709.06*((Total Displ/Length cubed)^0.346)))+(0.4*(2266.4*(Righting Moment^-0.3661))+(0.1*(868.5*(Upwind Sail Area^-0.2962)))+(0.005*(918.43*(Downwind Sail Area^-0.2208)))) i.e the prediction that is weighted by a factor of itself. Again, usual health warnings apply. Sten sailing as distinct from a club level helm is worth well over 100pts in my humble opinion so in essence all this PY chat is hot air really, no?! A graph of some spinnaker dinghies predicted vs actual PY attached. Nick Peters, you're welcome, mate. ![]() Edited by Daniel Holman |
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rodney
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Joined: 26 Feb 09 Location: United Kingdom Online Status: Offline Posts: 915 |
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Posted: 02 Oct 09 at 5:15pm |
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Funny you should say that |
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G.R.F.
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Joined: 10 Aug 08 Location: United Kingdom Online Status: Offline Posts: 4028 |
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Posted: 02 Oct 09 at 4:16pm |
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950!
Not a part time band leader by any chance Rodders? |
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rodney
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Joined: 26 Feb 09 Location: United Kingdom Online Status: Offline Posts: 915 |
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Posted: 02 Oct 09 at 4:12pm |
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D-One - PY? Good question! It's interesting that Sten's original take on this was 950 but this was based on a relatively short period of testing so we felt a need to get more input. We have now had the chance to pace the D-One against a number of other boats in Guess what! We have concluded that 950 is our recommended PY and we will be monitoring results on a race by race basis and analysing this information. I will give this forum feedback on this as more data comes to hand. With 4 boats racing from now on in the UK at different venues and courses against widely varying handicap fleets we should have some seriously meaningful stats soon. A nice weekend to all, at least it should blow away any cobwebs Rodney |
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Norbert
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Joined: 31 Mar 04 Location: United Kingdom Online Status: Offline Posts: 351 |
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Posted: 02 Oct 09 at 12:31pm |
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Edited by Norbert |
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blaze720
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Joined: 28 Sep 05 Location: United Kingdom Online Status: Offline Posts: 1635 |
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Posted: 01 Oct 09 at 8:53pm |
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Tim I'm guessing but around 11.00 is standard - but park/launch time is low. F5 ... should be interesting but a bit lighter on Sunday Mike L. PS - As it is a pursuit event you should have plenty of extra time .. |
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Posted: 01 Oct 09 at 8:31pm |
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Hi Mike, hmmm....I am not sure yet. I am picking D-One up Friday afternoon so I can get a whole day sailing in a force 5 at QM....after that I might hitch it and show my face at Burf. What time is first start? TIm |
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blaze720
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Joined: 28 Sep 05 Location: United Kingdom Online Status: Offline Posts: 1635 |
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Posted: 30 Sep 09 at 11:03pm |
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BTW ... er Tim - I was not going around the cans. I was just sneaking up on you in the D1 trying not to look too obvious to see how they compare. We are not going your particular way with Blaze/Halo but real on the water info is the hard currency that feeds into practical ideas .. and if Halo looked fast in that dismal wind then just wait and see what 'simple' really can do in a few more knots ! Can you make it to BSC this weekend ? Variety is the spice of ... well you know. And after the GRF 'crack' you owe a beer or two... Mike L.
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