Boats & Polars

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Polars & Performance

Below is a collection of polar diagram from various sources.

Mostly in numerical format to easily plug into routing software. They’re published here just to play around with. For serious/real use you should get a real one for your specific boat. Also some links to tuning guides and other perfomance related info. Share and enjoy!

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Various sources for IMS ratings with VPP-data:

Just for reference I collected a bunch if IMS certificates here.

I also collected lots of IRC numbers, just for reference. Sorted by boat type and sorted by Time Corrector (TCC).

Pelle Lindell did some excellent comparisons between LYS, IRC, IMS, ORC Club and PHRF: “Käpp eller rullator, handikapp för seglare – En jämförelse av olika handikappsystem” + spreadsheet.

Various sources on trim/tuning (Swedish):

Various polars from Sailinline.org.

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47 Comments

  1. blur » Blog Archive » Polardiagram
    Dec 18, 2006 @ 12:17

    […] Jag har sammmanställt en del polardiagram för olika båtar här. Kan vara intressant att labba med om man skall byta båt (eller bara på kul). […]

    Reply

  2. blur » Blog Archive » Wrap Up 2006 - bloggen
    Dec 28, 2006 @ 22:18

    […] Sökt på Google: vad är det folk har sökt på när de kommer till blur.se? I fallande ordning ‘Maria Cattiva’ (>500 klick), ‘polardiagram’, ‘Tjörn Runt’, ‘Blur’, ‘x-35′, ‘Albin Nova’, ‘Bengt Falkenberg’, ‘Hermanö Runt’, ‘Gotland Runt’ och över 2.000 andra sökord. […]

    Reply

  3. Trimguider « Aiming First
    Apr 23, 2007 @ 22:06

    […] Jump to Comments Her er en liste over trimguider på nett. Les og kos […]

    Reply

  4. Ron Kallen
    Jun 12, 2007 @ 19:16

    Hi,
    I went to your Web page looking for polar diagram or data for Tartan 10. I found the tuning guides but not the performance prediction. If anyone has one please let me know.

    Thanks,
    Ron

    Reply

  5. Bruce Carter
    Jun 26, 2007 @ 04:52

    I also am looking for T-10 polars; are any available?

    Bruce

    Reply

  6. Euro
    Oct 25, 2007 @ 06:23

    Hi guys, given that there’s a lot of people from Scandinavia here I figured I’d ask the question; Has anyone come accross the polars for the dJUICE VO60 or any of the other last generation VO60’s. Please let me know,

    Euro

    Reply

  7. mandul
    Nov 13, 2007 @ 17:03

    Hi Euro,
    I have ORC polar data for VO 60 but only in paper format, so I have to rewrite them and then send it to you.

    Please, let me your e-mail.

    Mandul

    Reply

  8. Harald H
    Nov 25, 2007 @ 00:37

    Peter,
    Det finnes et ferskt IMS-målebrev for IW 31 FIN 6313:
    http://www.avomeripurjehtijat.fi/certlist/?boat=L-6313&content=pdf

    Jeg har plottet polardiagrammet her:
    http://iw31.blogspot.com/2007/10/s-fort-br-vi-seile-polardiagram-for.html

    Reply

  9. Brian
    Feb 11, 2008 @ 18:05

    Anyone with polars for :

    Benateau One Ton ?

    Would appreciate it.

    boloughlin@cox.net

    Reply

  10. Carl Schaefer
    Feb 25, 2008 @ 01:30

    I’m looking for polars for an Etap 30. I’m hoping someone across the Atlantic that races an Etap 30 might be able to help me.

    Thanks!
    Carl

    Reply

  11. lakis
    Apr 8, 2008 @ 11:50

    Please, is it possible the polars for X-40 with genoa 135% or genoa 105%.

    Thanks
    Lakis

    Reply

  12. Geof
    Apr 24, 2008 @ 14:03

    Do you know where I can get a polar diagram for Capri 22?

    Reply

  13. FC8
    Apr 25, 2008 @ 11:09

    Noen som kan hjelpe med å tyde polardiagrammet for First Class 8?

    Reply

  14. Roberto
    Jul 28, 2008 @ 21:18

    I am looking for catalina 38 polar diagrams?
    Or suggestion how to calculate them ?

    Reply

  15. mrcodydog
    Sep 9, 2008 @ 13:12

    any one have a polar or tuning guide for a Delher 22/Dehlya 22?
    thanks

    Reply

  16. Huwp
    Sep 18, 2008 @ 09:02

    Any polars/performance for the new First 45 with Carbon Rig and deep keel?

    Reply

  17. Joakim
    Sep 18, 2008 @ 10:01

    Here are some Dehlya 22 polars from IMS VPP (with oversized 36 m2 spinnaker). Displacement and RM are not accurate, but I found the target speeds to be OK.

    The boat is very fast for it’s size and age when the wind is 10 kn or less. In stronger winds it’s speed is limited by the short waterline and the hull form that is very difficult to get out of displacement mode.

    TWS, BSP, TWA, BSP, TWA
    6, 3.79, 43.9, 3.67, 148
    8, 4.63, 43.4, 4.61, 150
    10, 4.77, 40.5, 4.81, 165
    12, 4.85, 39.4, 5.17, 170
    14, 4.91, 38.8, 5.52, 172
    16, 4.95, 38.6, 5.80, 173
    20, 4.98, 39.2, 6.35, 172

    Reply

  18. Eric
    Oct 3, 2008 @ 15:55

    Joakim. Thanks for these figures!
    As a new owner of a Dehlya 22, I’m interested in the target speeds of my boat.
    But how can I transfer these numbers into a polar diagram? Do I need specific software for this?
    Do I read it right as TWS = True Wind Speed, BSP = Boat Speed, TWA = True Wind Angle?
    As I understand the angles, they represent the wind angle producing the maximum boat speed when tacking, and reaching. But what about the other wind angles?

    Eric

    Reply

  19. Mister B.
    Oct 5, 2008 @ 11:15

    Eric, you can use a spreadsheet like Excel to present these figures in graphical format. You would of course need the “other” angles too, they are found in the boats ORCc/i certificate – maybe Joakim can help you to find one?

    Reply

  20. Joakim
    Oct 6, 2008 @ 15:37

    Here are all the data for Dehlya 22. Note that TWA includes leeway. Hope you can read it. I don’t see any use of making the polar diagram. Just pick some values from the table and compare.

    Wind Velocity 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
    Beat Angles 44,0° 43,5° 40,3° 39,1° 38,5° 38,2° 38,5°
    Beat VMG 2,65 3,28 3,58 3,72 3,81 3,87 3,89
    52° 4,15 4,89 5,19 5,38 5,48 5,54 5,59
    60° 4,57 5,06 5,37 5,58 5,69 5,75 5,81
    75° 4,80 5,35 5,64 5,76 5,95 6,07 6,17
    90° 5,00 5,49 5,81 6,00 6,10 6,19 6,46
    110° 4,91 5,40 5,76 6,07 6,35 6,55 6,77
    120° 4,75 5,28 5,67 5,98 6,30 6,59 7,04
    135° 4,15 5,00 5,43 5,77 6,07 6,37 7,01
    150° 3,52 4,54 5,10 5,49 5,80 6,09 6,67
    Run VMG 3,05 3,93 4,59 5,04 5,40 5,69 6,22
    Gybe Angles 147,6° 149,5° 164,6° 169,7° 171,5° 172,9° 172,3°

    Reply

  21. Mister B.
    Oct 6, 2008 @ 18:18

    Polar diagram might come handy, if you are intrested in optimising VMC, on longer offshore legs perhaps…

    Otherwise, it’s just as Joakim says, pick your target and compare. You will however have to calculate your target speed: TBS=VMG/cos(TWA). And note also, that in the range 0…10 kn the TBS changes quite rapidly, so the wind (TWS) should also be measured accurately.

    Reply

  22. Eric
    Oct 7, 2008 @ 13:08

    Thanks a lot!
    Now I can compare my performance, and check the best course!
    As you say, the graph is not necessary, It’s the data I need..
    It will help me to improve my sailing :-)
    Eric

    Reply

  23. Eric
    Oct 8, 2008 @ 18:54

    Looking at the data, I’m not sure I understand it all :-(
    TWA 90° means: wind 30°; course my GPS 120° for example?
    And: if the wind blows 6 kt, and I sail 90° wind angle, I should be able to do 5 kt?
    I was comparing the data to the Dutch ORC-data I have for Dehler Sprinta (http://www.watersportverbond.nl/data/8F2_Sailspeed.xls), and it is suggested that the Dehlya is faster, allthough smaller???
    Thanks again for explaining, and helping me!
    Eric, Senior; but Junior Racer…….

    Reply

  24. Joakim
    Oct 8, 2008 @ 22:09

    As I said this data was with an oversized spinnaker, which is actually 38 m2 with the ORC formula compared to 33 m2 of Sprinta Sport, which should do 5,0X kn at 6 kn 90 (checked two boats).

    Even with a more typical spinnaker of 28 m2 the Dehlya 22 should do 4,89 kn at 6 kn 90. As I said it is a very fast boat for its size and age in light winds. Size doesn’t count that much in light winds and you should be able to sail faster than many bigger boats at 6kn.

    Reply

  25. pantelis
    Oct 20, 2008 @ 22:19

    Any polars for a mumm 36?

    Reply

  26. Alex
    Oct 21, 2008 @ 07:37

    Reply

  27. Viktor Erikson
    Oct 26, 2008 @ 19:23

    Hej!
    Nu finns det polardiagram för Beneteau First 32s5 här
    http://www.sailstarck.com/Forum/tabid/53/mid/369/threadid/7/scope/posts/Default.aspx#43

    Reply

  28. Huwp
    Oct 28, 2008 @ 03:55

    Noone has any polars or tune details for the Beneteau First 45 with carbon rig and deep keel ?

    Reply

  29. Frank
    Nov 17, 2008 @ 14:33

    I’m looking for polars for X 40 (1985) with 120% genoa.
    Who can help me? 11 Lakis: have ever had an answer?
    Thanks, Frank

    Reply

  30. Frank
    Nov 17, 2008 @ 14:35

    I’m sorry,
    I mean 130% genoa (N° 29)

    Reply

  31. mrcodydog
    Jan 12, 2009 @ 04:14

    Thanks for the Dehler 22 info the boat is very quick in light air

    Reply

  32. Tanya Stanford
    Mar 10, 2009 @ 10:22

    Does anyone have polars for Scampi Mark IV.? Help.

    Reply

  33. Steinar
    Apr 7, 2009 @ 14:19

    Any polars for First Class 10????

    Reply

  34. Bernard Bodin
    May 2, 2009 @ 08:41

    Good Morning,

    Any polars for a Bavaria 34, long keel, year 2000 manufacture?

    Thanks,

    Bernard Bodin

    Reply

  35. mrcodydog
    May 4, 2009 @ 13:58

    Joakim you state that a Delher 22 is difficult to get out of displacement mode could you give an explanation and ideas on optimizing for this condition.
    thanks

    Reply

  36. Joakim
    May 5, 2009 @ 07:39

    What kind of optimiazation are you talking about? The hull form is not designed for semiplanning speeds, thus it needs big waves to get over 7 kn and still the average speed will be below 7 kn. At least I was newer able to sail faster than 7 kn for more than a couple of minutes or so and that was in ~15 m/s wind with the big spinnaker.

    Reply

  37. mrcodydog
    May 5, 2009 @ 21:37

    I have not had the opportunity to sail my boat in strong down wind condition but other than a rather fine entry and the stub keel it would appear that it should be quite easy to sail fast down wind. I calculate a D/L of under 150. I was wondering if it is worth raising the keel or using a masthead chute. As this is a rare boat here in the states there is not much in English to go on. I rate in PHRF 234 which is very generous when looking at how fast the boat is in light conditions but not sure if it’s worth the penalty for a larger chute. My boat is rather bare below so no excess weight . Thanks for you response my blog for the boat is http://mysorellina.wordpress.com/ I also race on a Kirby 25

    Reply

  38. Joakim
    May 5, 2009 @ 23:20

    I think the D/L-ratio is close to 200. The waterline is about 5.5 m and the displacement in sailing condition (without crew) likely around 1,2-1,3 tn. I did never put my Dehlya on a scale, but I did quite a lot of queries from the German owners and ended up estimating my Dehlya to 1,3 tn. The official value is 950 kg (or even 900 kg), but it is not clearly stated whether it contains the 200 kg of water ballast. But then using the official WL of 5.2 m with 950 kg ends up close to 200 as well. Thus it is not a light boat! Or have you better knowledge of the displacement?

    I don’t know much about PHRF and the fleet is very different here, but picking up some familiar boats 234 sounds very easy to sail to:
    http://www.ussailing.org/phrf/Tool_%20HI_LO_AVG%20Report.pdf
    I had a LYS of 1.02, which meant I needed to be 2% faster than Albin Vega, 1% faster than Avance 245 and equal to Beneteau First 24. With that rating I did well under 5 m/s and lousy over 6 m/s.

    Sure it might help to lift the keel, but it takes quite long and also reduces stability quite much, thus not very safe when it blows. The mast has quite a long unsupported part and putting masthead chute to that needs some care. The boat does not carry well a big chute when it blows.

    Reply

  39. Instrument & routing på 5 kvällar | BLUR
    Jul 25, 2009 @ 22:51

    […] svensk segling och kappsegling Skip to content HomeBoats & PolarsAlbin NovaJ/109Gallery 2007Gallery 2008RacesFærderseilasenGotland RuntSkagerrak TwoStarTjörn […]

    Reply

  40. Yacht polars | Purepassionbyk
    Jun 12, 2012 @ 23:02

    […] Boats & Polars | BLURPolars & Performance Below is a collection of polar diagram from various sources. … For serious/real use you should get a real one for your specific boat. […]

    Reply

  41. Polar Files | RudderNut
    Jun 25, 2012 @ 16:40

    […] files for various boats can be found on the internet. Here is an example file Catalina 36 from the http://www.blur.se site. The file is text, and though this example has a “.txt” extension Tack Pad […]

    Reply

  42. Polar Tables - SailNet Community
    Nov 20, 2012 @ 01:40

    […] Polar Tables Not much help to the OP, but here's a site with quite a list: Boats & Polars | BLUR __________________ ".. there is much you could do at sea with common sense.. and very […]

    Reply

  43. Understanding the Polar Diagram - Page 2 - SailNet Community
    Nov 10, 2013 @ 17:53

    […] image while searching Polar speeds, look at manufacturers boat catalogs, on site like this one> Boats & Polars | BLUR On a ORC certificate you will not get a polar but something similar to what Bob Perry posted about […]

    Reply

  44. Appar sjöväder och prognoser - tips för seglare
    Mar 17, 2016 @ 09:33

    […] Vilken är högsta farten på alla bogar i alla vindar? Två bra källor till polärdiagram är: http://www.blur.se/boats/ och http://www.orc.org/index.asp?id=1 (där man behöver logga in och ibland betala för […]

    Reply

  45. Matt Zarem
    Feb 11, 2020 @ 06:30

    I’m looking for Polars for a Cal 35 MK1

    Reply

  46. Fernando
    Apr 25, 2020 @ 13:59

    Hi. I´m Fernando from Argentina. I have a J/24
    I am looking for the J / 24 polar chart.

    Here in Argentina we sail with jib 0% and a maximum crew of 340kg. So, the polars that I need would be with jib and not genoa.
    Do you have the information?
    Thank you very much.

    Fernando & Crew.

    Reply

  47. Todd
    Jul 11, 2020 @ 22:04

    Any information for Sprinta Sport? An E.G. Van derStat one design built by Dehler. Thanks.

    Reply

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