Transpac Tahiti - New polars?
Post by iconPost by bmertens | 2020-05-27 | 03:20:20

This from Scuttlebutt Sailing News, referring to the VR competition replacing the actual race.

Competitors will use polar performance data from Comanche, the 100-foot current first-to-finish Barn Door Trophy champion in the 2225-mile LA-Honolulu Transpac race, because as Betz explains, “The course record of 11 days 10 hours and 13 minutes is rather old and with the right weather could be beaten by a modern fast boat of this type.”

Are we getting new polars for the 100ft Maxi? I hope so, the old ones were ridiculous. Topping out at 26knts in 20 knts of breeze.

commenticon 8 Comments
Post by iconPost by YC6211 | 2020-05-27 | 04:20:22
Either that or the polars were always based on Comanche with a cap at 26kts. Would that boat really go much faster than that in 20kts anyway? I know it's a weapon, but 26 in 20 is damn quick.
Post by iconPost by zezo | 2020-05-27 | 07:52:26
From Wikipedia:

Comanche holds the 24-hour sailing record for monohulls covering 618 nmi in the 24 hours (averaging 25.75 knots

So it should be capable of higher instantaneous speed.

Could be capped indeed so the lack of waves in the game does not let us overtake it too easy.
Post by iconPost by YC6211 | 2020-05-27 | 07:56:16
That record would have probably been set in more than 20kts. Also that's a crazy average speed. It's essentially a 24h Sydney to Hobart.
Post by iconPost by toxcct | 2020-05-27 | 07:47:48
For what I looked when the race opened, the polars used in VR will be "Super Maxi 100".
Post by iconPost by bmertens | 2020-05-27 | 10:28:05
Check the YB track of Comanche in the 2018 Sydney-Hobart race and you'll it averaging 37 knots for a period crossing the Bass Strait. Clearly, if a boat can average 25.75 across an entire ocean, it can put up 1 hour averages much higher than that.

At one time I had Stan Honey's PowerPoint explaining their entire Transatlantic record navigation strategy and planning. I'm going to see if I can find it and post it here. I'm sure that would be catnip to this crowd. It's actually what inspired me to get involved in VR.
Post by iconPost by YC6211 | 2020-05-27 | 13:14:51
That race was sailed in a lot more than 20kts though. Hell I did that race on a 46ft boat and we averaged over 20 for a few hours. Spent 48 hours running in 30-35kts with the A5 up and a big following sea. Absolute sleigh ride.

There a documentary on YouTube about their run across the Atlantic and how they waited for the one system a year that they could get across in the one front. It was a great little video.
Post by iconPost by bmertens | 2020-05-27 | 18:42:38
I'm not saying Comanche does more than 26 knots boatspeed in 20 knots true. That might even be optimistic. Here are Scallywag's polars to TW and she's only doing 24. https://jieter.github.io/orc-data/site/?#AUS/HKG2276

My problem is the VR polars have the maxi slowing down above 20 knots. As YC6211 and anyone who's sailed on or anywhere near (I've sailed ICAP Leopard btw) one of those things knows they go a hell of a lot faster than 26 knots.

I found a presentation that gives Comanche's sail polars. BTW, the x-axis is boatspeed, not windspeed, and it goes up to 32 knots. I'm guessing they are keeping the speed polars close to the chest. You can find unbelievable details of that boat's performance online, but not the actual speed polars.

http://honeynav.com/wp-content/uploads/2017/09/Navigator-Preparation.pptx

So, looks like toxcct that you've checked and VR's polars match yours. That's all I wanted to make sure of. Thanks.


Post by iconPost by YC6211 | 2020-05-28 | 05:42:06
The IRL race requires Catalina Island to be left to port. Is that true for the VR race as well?
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