broadoak 0 Posted June 1, 2013 Share Posted June 1, 2013 After the interesting responses to my last question I am eagerly awaiting responses to this one Does anyone have the polars for a Lotus 1280? She may have been built before these were routinely done, but I am hoping some diligent Lotus owner or some other interested party may have worked them out and would not mind sharing the information. Here's hoping Cheers Link to post Share on other sites
Fish 0 Posted June 1, 2013 Share Posted June 1, 2013 If you can't get hold of any polars, an ORC rating certificate will produce fairly accurate polars for your boat. They used to be about $70 nz, but went up a whole lot, maybe $250. Google ORC club. I think they can also produce just detailed polars, I.e. not a handicap rating, again for a fee though. Link to post Share on other sites
broadoak 0 Posted June 2, 2013 Author Share Posted June 2, 2013 Thanks Fish, will look at that. Link to post Share on other sites
all fired up 6 Posted June 11, 2013 Share Posted June 11, 2013 I would love to lay my hands on a set of Polars for a Ross 930. Does anyone know if these exist? a.f.u Link to post Share on other sites
smithy09 50 Posted June 21, 2013 Share Posted June 21, 2013 And same again for a Ross 40!! Any help rewarded with Rum!! Cheers, Smithy. Link to post Share on other sites
woodsy 0 Posted June 21, 2013 Share Posted June 21, 2013 While we are on Ross boat polars a set for a Ross 9.1 would be suitably appreciated as well. Link to post Share on other sites
Pugwash 0 Posted June 21, 2013 Share Posted June 21, 2013 At the risk of seeming ignorant, may I ask what 'polars' are please? I subscribe to 'the only silly question is the one you don't ask' school of thought. Link to post Share on other sites
gurge 0 Posted June 21, 2013 Share Posted June 21, 2013 At the risk of seeming ignorant, may I ask what 'polars' are please?I subscribe to 'the only silly question is the one you don't ask' school of thought. Glad you asked. You were braver than me Link to post Share on other sites
Jon 360 Posted June 21, 2013 Share Posted June 21, 2013 Here ya go This is for a 6.5 mini Link to post Share on other sites
Pugwash 0 Posted June 21, 2013 Share Posted June 21, 2013 Hmmm. I'm deducing something to do with boat speed relative to wind speed and bearing of the boat to wind direction? Link to post Share on other sites
Jon 360 Posted June 21, 2013 Share Posted June 21, 2013 Then the interesting bit. Is you make up a sheet like this that will tell you what speeds you should be hitting at what wind speed and angle. Link to post Share on other sites
Pugwash 0 Posted June 21, 2013 Share Posted June 21, 2013 Ahaa! Is there a formula for calculating these? Link to post Share on other sites
Jon 360 Posted June 21, 2013 Share Posted June 21, 2013 Yes but I'm not that clever The designer usually produces them but the serious only use these as a starting point, then you start recording your speed,wind angle and speed to compare or you can build your own from scratch. Some chartplotting software run on a laptop when connected to your wind gear can record and produce your actuals Link to post Share on other sites
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