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Cutting 62cm carbon fin
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dllee



Joined: 03 Jul 2009
Posts: 4058
Location: East Bay

PostPosted: Mon Mar 18, 2019 11:58 am    Post subject: Reply with quote

..and a 62 fin might be minimal for your weight even overpowered on a 7 meter sail..
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joethewindsufa



Joined: 10 Oct 2010
Posts: 1067
Location: Montréal

PostPosted: Tue Mar 19, 2019 5:18 am    Post subject: Reply with quote

since you asked ...

on my JP SLW92 I use a Select 66cm fin with the 10 m² sails
with the 8.x sails I use a Curtis 56 cm fin
as yet I have NOT used a 7.x meter sail on that board.

even with the 8.x sails I prefer the 80 cm wide board
or even the Mistral Equipe 2

if i was to use a 7 meter sail on the 92 cm wide board
let's extrapulate
10 - 66
8.5 - 56
7.3 - ~48 cm fin

but I do NOT have any tuttle or deep tuttle 48 cm fins
could try my 44 cm slalom fin
something for me to try this summer ...

typically here in the 7.x meter conditions you want a narrower board !!
remembering that i am the average joe windsurfer who is 100+ kilos
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dllee



Joined: 03 Jul 2009
Posts: 4058
Location: East Bay

PostPosted: Tue Mar 19, 2019 10:35 am    Post subject: Reply with quote

But do you weigh 210lbs?
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akrausz



Joined: 19 Sep 2008
Posts: 124
Location: Sarasota, FL

PostPosted: Tue Mar 19, 2019 12:56 pm    Post subject: Reply with quote

Thanks for the response guys. I will be abandoning the idea due to effort involved and lack of confidence that it will work out. On a positive note, I think I have the fin size I need narrowed down to a 14 centimeter range!
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d0uglass



Joined: 28 May 2004
Posts: 1206
Location: Bonita Springs, Florida

PostPosted: Tue Mar 19, 2019 2:07 pm    Post subject: Reply with quote

Good idea to abandon the fin-cutting idea.

Between the 62 curtis and 56 drake on the free formula, and the 44 on the freerace board, you have plenty of better options for pushing for speed with the 7.3 sail.

Putting in lots of time on the water and getting the feel for your different board and fin combinations should help. Sometimes something might feel a bit awkward at first, but then when you adjust your style to it, or when the conditions are a bit different, it can be fast.

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joethewindsufa



Joined: 10 Oct 2010
Posts: 1067
Location: Montréal

PostPosted: Tue Mar 19, 2019 4:33 pm    Post subject: Reply with quote

@dlee - i now weigh 210 - was 240 last October !!
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DanWeiss



Joined: 24 Jun 2008
Posts: 2272
Location: Connecticut, USA

PostPosted: Wed Mar 20, 2019 3:33 pm    Post subject: Reply with quote

grantmac017 wrote:
If I was going to shorten that I'd cut the top and re-base it. It looks like it was vacuum bagged which won't take to being thinned or reprofiled well.
Ultimately even paying yourself minimum wage for your time you'll find it cheaper to just buy something else.


Yes! Cut from the fin's root then repot into a new base.

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akrausz



Joined: 19 Sep 2008
Posts: 124
Location: Sarasota, FL

PostPosted: Wed Mar 20, 2019 3:45 pm    Post subject: Reply with quote

d0uglass wrote:
Between the 62 curtis and 56 drake on the free formula, and the 44 on the freerace board, you have plenty of better options for pushing for speed with the 7.3 sail.

Putting in lots of time on the water and getting the feel for your different board and fin combinations should help. Sometimes something might feel a bit awkward at first, but then when you adjust your style to it, or when the conditions are a bit different, it can be fast.

Thanks James, very good advice. I like your blog and have used your calculator many times. I agree that I have good options. I'm always looking for ways to tune the performance of the equipment. I like to have the smallest fin that works best, so I'll probably continue to consider something approximately in the 50-52cm range for the small sail on the free formula.
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akrausz



Joined: 19 Sep 2008
Posts: 124
Location: Sarasota, FL

PostPosted: Wed Mar 20, 2019 5:20 pm    Post subject: Reply with quote

DanWeiss wrote:
grantmac017 wrote:
If I was going to shorten that I'd cut the top and re-base it. It looks like it was vacuum bagged which won't take to being thinned or reprofiled well.
Ultimately even paying yourself minimum wage for your time you'll find it cheaper to just buy something else.


Yes! Cut from the fin's root then repot into a new base.

Where does one buy a new base online?
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DanWeiss



Joined: 24 Jun 2008
Posts: 2272
Location: Connecticut, USA

PostPosted: Thu Mar 21, 2019 3:59 pm    Post subject: Reply with quote

akrausz wrote:
DanWeiss wrote:
grantmac017 wrote:
If I was going to shorten that I'd cut the top and re-base it. It looks like it was vacuum bagged which won't take to being thinned or reprofiled well.
Ultimately even paying yourself minimum wage for your time you'll find it cheaper to just buy something else.


Yes! Cut from the fin's root then repot into a new base.

Where does one buy a new base online?


It's not the base you buy but a mold you make. The process is very straightforward and easy with just a bit of care and minor handiness! https://youtu.be/gxUDTrsTusw

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