Search for a Location
  Clear Recents
Metro
South West
Central West
North West
  Surf Cameras
  Safety Bay Camera
Metro
North
Mid North
Illawarra
South Coast
Metro
West Coast
East Coast
Brisbane
Far North
Central Coast
Sunshine Coast
Gold Coast
Hobart
West Coast
North Coast
East Coast
Recent
Western Australia
New South Wales
Victoria
South Australia
Queensland
Northern Territory
Tasmania
  My Favourites
  Reverse Arrows
General
Gps & Speed Sailing
Wave Sailing
Foiling
Gear Reviews
Lost & Found
Windsurfing WA
Windsurfing NSW
Windsurfing QLD
Windsurfing Victoria
Windsurfing SA
Windsurfing Tasmania
General
Gear Reviews
Foiling
Newbies / Tips & Tricks
Lost & Found
Western Australia
New South Wales
Queensland
Victoria
South Australia
Tasmania
General
Foiling
Board Talk & Reviews
Wing Foiling
All
Windsurfing
Kitesurfing
Surfing
Longboarding
Stand Up Paddle
Wing Foiling
Sailing
  Active Topics
  Subscribed Topics
  Rules & Guidelines
Login
Lost My Details!
Join! (Its Free)
  Search for a Location
  Clear Recents
Metro
South West
Central West
North West
Surf Cameras
Safety Bay Camera
Metro
North
Mid North
Illawarra
South Coast
Metro
West Coast
East Coast
Brisbane
Far North
Central Coast
Sunshine Coast
Gold Coast
Hobart
West Coast
North Coast
East Coast
Recent
Western Australia
New South Wales
Victoria
South Australia
Queensland
Northern Territory
Tasmania
  My Favourites
  Reverse Arrows
All
Windsurfing
Kitesurfing
Surfing
Longboarding
Stand Up Paddle
Wing Foiling
Sailing
Active Topics
Subscribed Topics
Forum Rules
Login
Lost My Details!
Join! (Its Free)

Forums > Windsurfing   Gps and Speed talk

What Hardie's Run does to fins:

Reply
Created by hardie > 9 months ago, 20 Feb 2008
hardie
WA, 4103 posts
20 Feb 2008 9:10PM
Thumbs Up

Be careful out there, note where hit, they are very small fins,

Check it:

decrepit
WA, 12405 posts
20 Feb 2008 9:21PM
Thumbs Up

You $%#@^ you beat me!! I was about to start this topic.
Anyway here's the details.

On Monday I hit something just under the water at 31kt, (maybe a big crab???) with my favourite 20cm cedar/carbon/stainless weedy.
Unfortunately the stainless is only at the tip end, whatever it was penetrated deep into the cedar, delaminating the carbon on 1 side. Couldn't sail with it flapping so tore it off and sailed the ~1.5km home with care.

On Tuesday, coming out of my last gybe hit a rock, with my 23cm tuttle weedy. Sailed the ~1km back before turning the board over to see the damage, quite surprised me as it didn't feel too bad, perhaps I don't need the tip on this fin???

G10 probably wouldn't have sustained so much damage, but one of hardys lessacher carbon's had a similar delam, without the big impact crater.

Bender
WA, 2226 posts
20 Feb 2008 9:44PM
Thumbs Up

I have to agreed Decrep G10 is the go.

On Monday while sailing with my brand new 32cm techtonic G10 Falcon i hit my first rock i have come across in the lechenault Inlet.

i was fully wound up sailing broad and "bang" i hit something.

fearing the worst i flipped the board over and all there was a was a couple if tiny scratches onthe tip of the fin.

The impact felt so hard it jolted the board on impact.

So decrep can you do G1?

elmo
WA, 8765 posts
20 Feb 2008 9:45PM
Thumbs Up

G10 and an orbital sander

a crab crushers best friend

Still reckon you hit a big fish there were quite a few out on the coarse

I can guess that last night was in Cox Bay?

decrepit
WA, 12405 posts
20 Feb 2008 9:59PM
Thumbs Up

elmo said...

>>>>>

Still reckon you hit a big fish there were quite a few out on the coarse

I can guess that last night was in Cox Bay?


Guess a fish could do that damage at speed, I was thinking it needed to be a bit harder, I can easy imagine a crab shell doing it.

Yes, probably just out from cobblers, may have been the same rock that caused your big swim????
At least mine didn't break at the base, I could still sail.

decrepit
WA, 12405 posts
20 Feb 2008 10:03PM
Thumbs Up

Bender said...

>>>>>>
So decrep can you do G1?


I've just finished a fin for the good lady, not G10 at tons of pressure, but I used my anvil and boxes of spanners as weight to squash the glass together.
I'll try using some sort of clamp and see if that will produce more pressure next time.

I just don't like grinding all that fiberglass, may be I'll try a mold.

elmo
WA, 8765 posts
20 Feb 2008 10:07PM
Thumbs Up

Hit a school of mullet with a big Maisch fin and came back with the leading edge bruised about 5mm in.

Cox Bay, down near cobblers is strewn with flat rocks up to around 300m out and on the low tide yesterday would have made them accessible for your fin.

Bender snapped his fin of after pushing the length of run and ended up having a nice walk of shame

Bender
WA, 2226 posts
20 Feb 2008 10:21PM
Thumbs Up

Serves me right for pushing it in no-mans land and hanging sh#t in elmo's

karma is a bitch

Anyway back on topic.

Decrep i have used presses when storing timber before to keep it flat while it dries.
Could we make a rough type press to exert lots of pressure. Maybe the use of common car jacks or something similar

decrepit
WA, 12405 posts
20 Feb 2008 10:30PM
Thumbs Up

Bender said...

>>> Maybe the use of common car jacks or something similar


Yep a car jack would be ideal, just need to weld up a good frame.

elmo
WA, 8765 posts
20 Feb 2008 10:33PM
Thumbs Up

Thinking about it from a different angle.

Could it not be the structural strength of the thin layer of carbon laminated on the outside of the cedar.

A normal Carbon fin has a lot more bulk in its layer of carbon (I thunk) and would be able to handle an impact better.

May be barking up the wrong tree all together, it was a lonely thought rattling around my head so I let it lose on the world

nebbian
WA, 6277 posts
20 Feb 2008 10:36PM
Thumbs Up

Build the whole thing out of stainless. Fin vs Crab... [}:)]

vando
QLD, 3416 posts
20 Feb 2008 11:39PM
Thumbs Up

Man u guys have got the crabs bad.

nebbian
WA, 6277 posts
20 Feb 2008 10:51PM
Thumbs Up

At least we don't have turtles (ask Pierre about this one)

decrepit
WA, 12405 posts
20 Feb 2008 11:03PM
Thumbs Up

elmo said...

Thinking about it from a different angle.

Could it not be the structural strength of the thin layer of carbon laminated on the outside of the cedar.

A normal Carbon fin has a lot more bulk in its layer of carbon (I thunk) and would be able to handle an impact better.

May be barking up the wrong tree all together, it was a lonely thought rattling around my head so I let it lose on the world


Not sure what you're saying here Elmo???? I think you mean that the cedar is a lot softer than carbon, and a few layers of carbon over the top don't add to the impact resistance. Oh I see you're comparing the difference in damage between my cedar and Hardy's Lessacher. Yes think you're right the inside of that seemed to be a mix of carbon fibers and resin. a lot harder than cedar. So there wasn't as much damage to the front edge, but still enough to cause the delam.

grumplestiltskin
WA, 2331 posts
21 Feb 2008 8:25AM
Thumbs Up

decrepit said...

Bender said...

>>> Maybe the use of common car jacks or something similar


Yep a car jack would be ideal, just need to weld up a good frame.



Not sure if you have one down there, but MALZ motoring stores have a presses. Basically a steel frame with a hydraulic car jack built in.
Not very expensive from memory.

Might be easier than putting a jig together.

nebbian
WA, 6277 posts
21 Feb 2008 11:00AM
Thumbs Up

What's wrong with drilling some holes in the corners of your mould, and using bolts?

mathew
QLD, 2061 posts
21 Feb 2008 3:10PM
Thumbs Up

nebbian said...

What's wrong with drilling some holes in the corners of your mould, and using bolts?


... getting it closed in the first place...

choco
SA, 4080 posts
23 Feb 2008 11:07AM
Thumbs Up

The only 2 times i have hit something in the water the fin was okay tuttle bolts were bent but nearly ripped the tuttle box out of the board sticking out a couple of mil.I'm surprised you guys don't do any damage to the box itself.

decrepit
WA, 12405 posts
23 Feb 2008 4:18PM
Thumbs Up

choco said...

The only 2 times i have hit something in the water the fin was okay tuttle bolts were bent but nearly ripped the tuttle box out of the board sticking out a couple of mil.I'm surprised you guys don't do any damage to the box itself.


Sacrificial fins!
It's much better having the box stronger than the fin.
There again sacrificial bolts would be better, especially if the fin was on a tether, that is coiled up inside the box. All you need then is an emergency method of keeping fin in place.



Subscribe
Reply

Forums > Windsurfing   Gps and Speed talk


"What Hardie's Run does to fins:" started by hardie