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  Topic: Lift from fin?
DanWeiss

Replies: 26
Views: 555

PostForum: Windsurfing Discussion   Posted: Mon Mar 25, 2019 7:12 pm   Subject: Lift from fin?
SNIP

I'd like to see a longitudinal video from a GoPro mounted beneath a board looking back at a long blade fin being pushed hard. SNIP

Here you go: https://www.youtube.com/watch?v=OEhYC9IYOSU
  Topic: Lift from fin?
DanWeiss

Replies: 26
Views: 555

PostForum: Windsurfing Discussion   Posted: Mon Mar 25, 2019 7:09 pm   Subject: Lift from fin?
I whole heartedly disagree as I venture would every shaper, fin designer and naval architect.

Yeah....whatever. Viscous forces govern and fin lift opposing side slip:I don't buy it.

Viscous for ...
  Topic: Lift from fin?
DanWeiss

Replies: 26
Views: 555

PostForum: Windsurfing Discussion   Posted: Mon Mar 25, 2019 9:33 am   Subject: Re: Lift from fin?
SNIP
I think that on a windsurfer that the fin does not create lift, the SAIL is what gets you upwind, and the fin is governed by viscous forces (prevents side-slip). If you sail a freestyle fin, yo ...
  Topic: Effect of foil mast length on planing, leverage, etc.
DanWeiss

Replies: 5
Views: 197

PostForum: Windsurfing Discussion   Posted: Sun Mar 24, 2019 4:20 pm   Subject: Effect of foil mast length on planing, leverage, etc.
A longer mast allows greater leverage over the foil since it increases the distance between the wings and your feet. A longer mast also allows the board to fly clear of larger chop than it could do w ...
  Topic: Lift from fin?
DanWeiss

Replies: 26
Views: 555

PostForum: Windsurfing Discussion   Posted: Sun Mar 24, 2019 4:18 pm   Subject: Lift from fin?
Angle of attack vs actual direction of travel. That gets the windsurfer upwind.

Large fins like the soft, FW fins clearly flex longitudinally. This flex works like a foil, adding vertical lift to ...
  Topic: Cutting 62cm carbon fin
DanWeiss

Replies: 20
Views: 880

PostForum: Windsurfing Discussion   Posted: Thu Mar 21, 2019 3:59 pm   Subject: Cutting 62cm carbon fin
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 fo ...
  Topic: Cutting 62cm carbon fin
DanWeiss

Replies: 20
Views: 880

PostForum: Windsurfing Discussion   Posted: Wed Mar 20, 2019 3:33 pm   Subject: Cutting 62cm carbon fin
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 fo ...
  Topic: board PAINT advice? (after footsrap insert install mod)
DanWeiss

Replies: 15
Views: 870

PostForum: Windsurfing Discussion   Posted: Wed Mar 13, 2019 1:05 pm   Subject: Re: board PAINT advice? (after footsrap insert install mod)
SNIP

- I just want white, don't need precise color match.
- I want it to look decent, but more important is good durability and weather/water resiliency.
- I'm not as weight-conscious as I think ...
  Topic: What sail can I pair with this odd Powerex 500cm?
DanWeiss

Replies: 11
Views: 669

PostForum: Windsurfing Discussion   Posted: Tue Mar 12, 2019 12:59 pm   Subject: What sail can I pair with this odd Powerex 500cm?
After leaving Neil Pryde, Spanier joined Gaastra as part of the Team. Gaastra sails at that time were constant curve and they remained so during the time when Spanier was their sail designer. I have ...
  Topic: Mast sizes
DanWeiss

Replies: 38
Views: 4064

PostForum: Windsurfing Discussion   Posted: Mon Mar 04, 2019 10:56 am   Subject: Mast sizes


I completely agree with what you say. h=However, if you imagine pointing very high, at higher board speeds the apparent wind moves closer to the nose of the board ultimately causing a stall or the ...
 
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