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raffar
Joined: 23 Dec 2007 Posts: 47
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Posted: Sun Jun 28, 2015 10:50 pm Post subject: Curtis fins 60 vs. 70 |
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Hi all,
I'm trying to figure out which fin size shall I use:
Curtis 60cm Race vs Curtis 70cm Race
Why would you use one instead of the other?
Setup:
Lake (mostly) flat surfing, generally 10-20 knots
Starboard formula 156.
Sails Aerotec 9.0, Maui 8.0
RAF |
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joethewindsufa
Joined: 10 Oct 2010 Posts: 1190 Location: Montréal
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Posted: Mon Jun 29, 2015 5:19 am Post subject: |
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60 for the 8 and 70 for the 9 ?? |
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d0uglass
Joined: 28 May 2004 Posts: 1286 Location: Bonita Springs, Florida
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Posted: Mon Jun 29, 2015 9:14 am Post subject: |
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70 cm is a better all-around choice for early planing and good upwind on a 100 cm wide formula board. You need a lot of lift from the fin to get that wide board to trim right.
60 cm would be OK in 15+ knots with smaller sails, but even then it might feel a little funny.
I'd get the 70 cm to start with, then try the 60 if you feel like you need more control in high winds. _________________ James' Blog: Windsurfing Equipment Size Calculator
http://jimbodouglass.blogspot.com/2010/11/updated-windsurf-calculator-online.html |
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manuel
Joined: 08 Oct 2007 Posts: 1158
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Posted: Mon Jun 29, 2015 9:50 am Post subject: |
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Sailed this exact combo for years, awesome light wind freeriding.
For my 160lbs the 70cm had too much lift and associated drag.
Used a 60cm up to 9.2 and it was wonderful!
For 9.5 maybe 64cm, I'd keep the 70 for 10.5+
Now if you weigh closer to 200lbs then it'd make sense to increase fin length. _________________ *NEW* - Manu's Windsurfing Blog, The STORE! |
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coachg
Joined: 10 Sep 2000 Posts: 3550
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Posted: Mon Jun 29, 2015 11:26 am Post subject: |
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+1 to what Manuel said.
You have the older formula board with the narrower tail. Free sailing with 8.0 & 9.0 under 20 mph 60 cm will be plenty unless you are a really big guy or are needing super high angles for some reason.
Coachg |
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techno900
Joined: 28 Mar 2001 Posts: 4161
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Posted: Mon Jun 29, 2015 12:12 pm Post subject: |
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Also depends on your weight. The Drake 70 is OK in lighter winds, but it doesn't have much range. If you need the 70 to plane, fine, but if there is enough wind to plane with the 60, then that's your call. This assumes you are not racing. |
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DanWeiss
Joined: 24 Jun 2008 Posts: 2296 Location: Connecticut, USA
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Posted: Mon Jun 29, 2015 1:41 pm Post subject: |
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70 to maximize upwind and downwind power and angles. 60 is fine if just beam reaching very powered up. _________________ Support Your Sport. Join US Windsurfing!
www.USWindsurfing.org |
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raffar
Joined: 23 Dec 2007 Posts: 47
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Posted: Mon Jun 29, 2015 11:57 pm Post subject: |
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Yeah I'm just past the 200 lbs mark
Maybe it'll explain why I haven't had too much issues with too much lift on the 70.
Thank you for the tips. I will keep on trucking with the 70 and reserve the 60 cm for windier days.
RAF |
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joethewindsufa
Joined: 10 Oct 2010 Posts: 1190 Location: Montréal
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Posted: Wed Jul 01, 2015 8:15 pm Post subject: |
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and i am past the 230 mark
reason for my suggestion |
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Sailboarder
Joined: 10 Apr 2011 Posts: 656
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Posted: Fri Jul 03, 2015 6:19 am Post subject: |
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You might also find that the chop level will influence your choice. If water if flatter than usual, you'll go faster and any fin will generate more lift. You might then like better your 60 instead of the 70. |
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