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Old 17th July 2013, 02:09 AM   #21
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Originally Posted by BelSkorpio View Post
I'm not convinced that a 9.6 is as powerful as a 10.9.
Getting onto the plane with it, yes. But pointing upwind, doubtful.
For me I found the 2011/2012 Ultrasonic pretty poor upwind unless well powered, where the 2013 seems to easily fly upwind, even when not fully powered(using the same fin of course)
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Old 17th July 2013, 07:04 AM   #22
BelSkorpio
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YES. I Completely agree.
I wrote this already more than a year ago in a thread. Don't remember anymore which one.
I cannot compare with the 2013 version of the US because I've never tried it but I compare with my former Formula 161. Perhaps I shouldn't compare with a Formula because obviously the US is NOT a Formula but I also found that pointing was not the best property of the US.
What I can tell you is that a bigger fin (e.g. 64) in combination with a 10.9 sail and the mast foot way back helps A LOT. So, indeed the US needs power for pointing. It handles the power also very well and that's why I like it a lot.

Interesting to hear that the 2013 version points better. Must be the wider tail, although I haven't checked the specs.
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Last edited by BelSkorpio; 17th July 2013 at 10:18 AM.
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Old 17th July 2013, 11:18 PM   #23
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Without trying the two back to back I couldn't say but they seem the same upwind, just need to be planning and a decent size fin.
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Old 5th December 2014, 07:01 AM   #24
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Default US 147 with 10.9

Hallo guys, I read this quite old topic, where I see some of us tried the Ultrasonic with 10.9 sails.

So, I am quite interested on buying an US (or equivalent; today best option is the US), so I have few questions.

First of all, I am 75 Kg, height 1.75m, having 9.5 race sail and 85 Manta slalom, I have big experience of FW racing, never had the opportunity to sail the US or equivalent.

So, the questions are:

1) I suppose using an US with 9.5 is not a big inprovement to the Manta 85 (or equivalent) and same sail; what do You think about?

2) If You confirm me the 10.9 is well suited and confortable for US, do we have an inprovement vs the 85 and 9.5?

3) what about the comparison beteween the US+10.9 vs FW?

Please note I disagree on the fact I read the 9.5 for slalom is more powerfull of a 10.9 for FW.

FWs sails are designed for big and heavy boards, moving at very slow speed (comparend to slalom) and different angles, while 9.5 for SL are designed to very high (in comparison) speeds and different apparent Wind angles. So, to me, an FW sail well designed has always more power compared to a slalom one.

Thanks
Giuseppe
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Old 6th December 2014, 02:01 PM   #25
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Hi Unregistered,

1) I've compared a 85 wide Fanatic Falcon with the US 2011 in combination with a 9.3 sail. The 85 Falcon feels lighter and has more top end speed, at least for me. The US planes earlier and much better through lulls and also points better. I've tried both boards in exactly the same conditions on the same day and with the same sail. Believe me, the difference is quite substantial and it becomes even bigger when your body weight goes up. According to me, in light conditions (10-15 knots) with typically a lot of lulls, the US would win each time a Slalom 8 race. In 12-17 knots the difference would get smaller. If you purely go for the thrill of max top end speed, choose a 85 wide board.

2) A 10.9 works great on the US, but with a bigger fin. Some say 62. I have a 64. Perfect. What do I gain c/w a 9.3 sail ? about 2 knots. That's all. But it's a lot in the ultra light. It can mean the difference between planing or not planing. I plane from 8 knots without too much pumping and maintain planing until 6-7 knots. This is hardly possible or very difficult with a 9.3 sail. It would need an incredible amount of pumping, which I don't like. Even more important is the increased pointing capabilities with the 10.9 sail. I don't like to struggle to return to my beginning point.

3) When I said that the US is better pointing than an 85 wide board, there is even a bigger pointing difference between the US and my former Formula 161 (70 fin) in combination with a 10.9 sail. The Formula is unbeatable on that level. On the other hand, the US feels much lighter and has far more top end speed fun (for me).
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Last edited by BelSkorpio; 6th December 2014 at 02:13 PM.
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