dorox

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About dorox

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    London, UK; Moscow, Russia

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  1. dorox

    The new sailing twin skin setup

    The last one, headsail (without mast, single skin): L/D = 14.208 Hmm, I guess I'm calculating L/D wrongly there, numbers aren't making much sense. will redo it another day. It would be helpful if someone gives me the cross section dimensions for ac50 wing, and ac75 mast and sail - that would make the simulation a bit more relevant
  2. dorox

    The new sailing twin skin setup

    While having a little time to procrastinate I have tried to see the difference in lift-to-drag ratio(L/D) between different wing and mast designs - lets see your opinions. The simulation is for a 10 m/s wind at an angle of 6deg to the wing (sail). Symmetrical single wing: L/D = 8.8243 Non-symmetrical wing (it is similar to double-skin sail): L/D = 9.0541 Circular mast with a single skin sail : L/D = 22.934
  3. dorox

    Artemis?

    Seems like Artemis is taking part in the work on the design rule. Did they officially announce the challenge? Or is it a random person wearing an artemis hat? (screenshot from the recent ETNZ video)
  4. Nope, this guy is not a commodore of St Peterburg YC. He is the owner of watste processing company, alcohol producer, and a lecturer in a university . It does not seem like he has any connections to Gazprom. Valentin is actually the leader of the Synergy racing team - the one which participated in ACWS in 2011 under the name of "Ё-Challange" according to russian press https://itboat.com/articles/263-kubok-ameriki-rossiya-uchastvuet. I can not confirm this as I did not follow AC at that time, but there is a picture of the boat (could be photoshopped). The interesting thing is that Synergy wanted to compete in 34th AC, but the cost was too high."The cost has grown from 20 millions euro for 32 AC to 60millions for 34 AC... I am not sure that there is anybody willing to compete at that price in Russia" https://itboat.com/articles/183-kogda-nibud-my-ego-zaberem
  5. dorox

    Team NYYC

    Waiting for Russian hackers to steal ETNZ's simulation software
  6. dorox

    AC36 Protocol - Ask Dalts

    Good job asking about the bulb. Now one can imagine their 2 options are: with and without ballasted keel (?)
  7. dorox

    AC36 Protocol - Ask Dalts

    Will the videos from ac34 and ac35 be published on youtube? Will the race management publish boats telemetry as it has been done before?
  8. dorox

    Next USA Team

    I can assure you - you woudn't see a potential AC founder there
  9. dorox

    Next USA Team

    Nobody cares about sailing in Russia. It is just too far from being a national sport. And the oligarchs are having fun in RC44 which they can actually sail, as opposed to modern AC. There is also a language barrirer and the price of oil. There was an interesting endeavour of Gazprom with ESS, but it failed.
  10. Today's data. Oracle had non symmetric foils - look at the speed difference on the polar - port foil was worse. Not much of the straight line speed difference I would say. Probably tacking is killing them.
  11. Yes, and the median TWS is higher for NZL, which supports the point. I don't see much speed differential, not at all. Probably the most gains were created by maneuvers. I need to find the way to analyse that.
  12. dorox

    Oracle Team USA

    Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86
  13. dorox

    Team NZ

    Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86
  14. Today's portion of "analytics": Tactics: median TWS for NZL - 8.7kn, USA - 8.5kn. Tacking: average VMG at TWA<30deg: NZL-13.8, USA- 13.13 Gibing: average VMG at TWA>160deg: NZL - 23.86, USA - 17.86