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    Posted: 03 Oct 09 at 8:32pm
Originally posted by blaze720

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 ..

 

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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Post Options Post Options   Quote Nick Peters Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 11:56pm

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

 

Nick


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Post Options Post Options   Quote Daniel Holman Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 10:07pm
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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Post Options Post Options   Quote rodney Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 5:15pm

Originally posted by G.R.F.

950!

Not a part time band leader by any chance Rodders?


Funny you should say that

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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 4:16pm
950!

Not a part time band leader by any chance Rodders?


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Post Options Post Options   Quote rodney Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 4:12pm

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 Chichester Harbour and other UK locations as well as having the feedback from the more exotic Lago di Garda. 

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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Post Options Post Options   Quote Norbert Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 09 at 12:31pm




Edited by Norbert
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Post Options Post Options   Quote blaze720 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 09 at 8:53pm

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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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 09 at 8:31pm

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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Post Options Post Options   Quote blaze720 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 09 at 11:03pm

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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