17mika

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About 17mika

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  • Birthday 01/07/1984

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    Milan, Italy

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  1. 17mika

    Luna Rossa Challenge. AC 36

    In an interview today with Gazzetta dello sport, max confirmed the current target date for boat 2 launch is october 20th. Another veeeeeery interesting answer was about the speed. He was much more explicit than what I thought it would. He said that he saw the kiwi in the last outings and did not come back crying (i.e. speed not very different from them) and he said about the other teams "I am happy where we are, angles are hard to compare precisely, but I think i can see when a boat is much faster or slower. Than we will have answers when we cross at the start line". I think he intended that Other 2 boats are slower Interview in italian
  2. 17mika

    INEOS Team GB

    My estimate. AM 12th INEOS 15th LR 20th ETZ start of nov.
  3. 17mika

    49er - new style mast

    There has been quite few ungluing of moth fittings (hounds and spreaders) on towpros, but I can explain most of them with very extreme temperatures (i.e. Perth) and most importantly wrong glue used (spabond vs plexus). There is some kind of myth in the moth class that everything has to be glued with spabond, but for alluminium on carbon seems like plexus is the way to go. And it also generally seems to manage heat better...
  4. 17mika

    49er - new style mast

    Look at cst composites facebook. They provide details on plexus vs spabond for glueing masts and I think some on their pre-peg construction (towpro)
  5. 17mika

    49er learning curve

    How heavy you are? Were your racks wide as per class rule or did you go wider? 10 upwind in a 4k is bloody fast, even if slightly footing. When I was sailing the4k I was tipycally on the 8 knot range un the good breeze
  6. 17mika

    Luna Rossa Challenge. AC 36

    Nothing special, other than Pietro Sibello is the mainsail trimmer (I did not know that). Happy he is getting a good role, after all the struggles he had (end of 2008 Olympics and 2012 missed participation)... I just met him once, and he seemed to me like a great guy.
  7. 17mika

    Luna Rossa Challenge. AC 36

    Thanks zaal! I listened to part of the interview but missed some interesting points Just one small remark. Regarding waves limit that 4-5m number by checco is a fake number he said. They get some trouble in much less waves (i suspect more like 2, 2.5 metres) Michele
  8. 17mika

    Larry's AC50 Circus

    I get your point. Honestly I have no competence on that to give u an informed opinion... it could be that effectively on the 50s the sum of the 2 rudders is negative..
  9. 17mika

    Larry's AC50 Circus

    I still do not get your point about that if f50 had one rudder in the middle of the boar, it would probably have positive lift in "normal" siling conditions, but since they have 2, they can put neg lift on the windward one, to get more righting moment. But of course the leeward rudder always have positive lift. What matters in the 50 is basically the lift differential generated by the 2 rudders more than the absolute number per se. Than I guess that the total lift by the some of the 2 rudders normally is positive (not sure but I assume so). In the 75, since they have only one, it works like a normal foiling boat, where normally the rudder provides positive lift, unless something happens (ex boat goes a lot bow down then rudder aoa gets negative and pulls the stern down).
  10. 17mika

    Larry's AC50 Circus

    aahah you're right. Anyway, as Stingray said, the whole interview is really cool. a lot of discussion as well about Bermuda and why ETNZ won.
  11. 17mika

    Larry's AC50 Circus

    Just watch around minute 10 the interview. AC50 had a 3 degree limit on rudder differential, F50 have increased that to 7 degrees, so that in medium air boats can be much more powerful than the Bermuda boats and go much faster. Designers have set a maximum downforce limit in the software of about a ton, so that when boats hit around 37 knots, windward rudder starts to increase AoA to decrease downforce. Limit is for both structural reasons (i.e. not breaking rudders elevators and bearings) and for safety reason, cause if windward rudder pops out of the water, boat loses too much righting moment and can capsize. Pretty cool feature.
  12. 17mika

    Larry's AC50 Circus

    Just seen it! one of the best interview I've seen in a long time. SailGP stuff is cool... really interesting a couple of things: 1) rudder differential automatic limit starts around 37 knots, where the max you can have progressively decreases from 7 degrees to 3 degrees. since max downforce can be around a ton. 2) F50 have very unstable foils even compared to the AC50, so they have some "semi-automatic" controls. for example manual changes in foils AOA automatically trigger small adjustments to rudder elevator, to keep in a sort of loop the boat pitch stable 3) New wings are moved with actuators, and they seem much more precise than the old, moved by strings, to it's going to be much more about twist/flap movement than whole wing AOA change. Hence boats should be much more controllable. And of course much faster upwind in the breeze because of the "small wing" option.
  13. 17mika

    Luna Rossa Challenge. AC 36

    I moreless agree. You wonder really how some very good but not exceptional ita sailors got to the 2021 LR team, since they were not definitely in the mix, in previous campaigns. We'll see how the team will progress. I am also wondering if ruggi tita is now out of the team, since he is focusing heavily on the tokio nacra selection.
  14. 17mika

    Car topping a moth

    Sorry on sunday morning I forgot. Anyway first stars on front rack on the left, to around the kingpost (for ex 2 rounds with a cross), then to front rack on the right then around the kingpost again (a couple of rounds) then back to where you started. This must block boat from going forward, but also bow from moving right_left, so this is reason why you go a couple of times around the kingpost. On the back is easier, just from back rack to the boat and back to the rack to stop boat going back.
  15. 17mika

    Car topping a moth

    I have trasported moths fully assabled on top of my car for 5 years now, for travels of more than 1.000 km. Boat fully assabled on the trolley, tramps on, boom on fixed in a good position. As somebody said, you have to look at local regulation for car topping. In europe is basically allowed everywhere but switzerland, where you can get some insane fines. Regarding safety, I had Zero issues, unless I had very significant cross-winds (25+knots). In that case removing tramps would be better. It is just important to tie well both the trailer and the boat to the racks. Typically from front rack to kingpost and from back rack to where real wingbars meet the hull. I have mine on top of my car now, I'll do some shots tomorrow morning if it is useful