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 General

Old Board, New Fin.

Reply
Created by olskool > 9 months ago, 3 Apr 2020
olskool
QLD, 2455 posts
3 Apr 2020 9:59PM
Thumbs Up

So ive found an old Mistral Explosion CHS 130litre. 288long x 59wide i think. Came with old elliptical PB fin about 33cm. Wide n very thick cord compared to todays fins. Much larger area planshape also.
Any benefit to using a modern slalom fin?
Im 105kg.
Guess the board sail range 5.5m- 7.5m.
What size fin for this ol relic?

Basher
539 posts
3 Apr 2020 8:25PM
Thumbs Up

That's obviously a big old board, and long and relatively narrow compared to modern gear.
Sailing it is something you'll need to experiment with and a thinner modern fin might indeed be faster than one with a fat chord.

The size of fin used will still depend on what sail size you choose. I'd be inclined to borrow any powerbox-head fin just to see what you find.
A 30cms freeride fin might be a good starting point - or a bit longer if you go for the 7m+ sail.

I'd also be wondering where to set the mast foot. My guess would be a the back of the track.
I might also shift the front footstraps forward as far as hole options allow.

PhilUK
1020 posts
3 Apr 2020 9:56PM
Thumbs Up

I had one of those when they first came out. Sailed it with an Arrows Grand Slam 7.1m That felt huge at the time, a real beast.
I'd say use the mast track at the very back, older boards have them a long way forward.
Does the board look low rockered? How long is the planing flat? I'm guessing low rockered and long planing flat, modern slalom boards have quite a short flat section. So I think you will need quite a powerful lifty fin, otherwise it might keep ploughing into chop. Try the one it comes with first. The foot straps look quite far forward, especially the rear ones. So leave them alone. If you move your weight forward it might keep ploughing into chop. There is probably a reason why they are at the back to start with.

fangman
WA, 1758 posts
3 Apr 2020 10:27PM
Thumbs Up

Select to expand quote
olskool said..
So ive found an old Mistral Explosion CHS 130litre. 288long x 59wide i think. Came with old elliptical PB fin about 33cm. Wide n very thick cord compared to todays fins. Much larger area planshape also.
Any benefit to using a modern slalom fin?
Im 105kg.
Guess the board sail range 5.5m- 7.5m.
What size fin for this ol relic?



I ride my Xantos 310 with a FF24 or FF28 and have blast, ( 61 wide). So comfy in short chop it's ridiculous. However mention pointers and all of a sudden I am no help at all, other than enjoy it, I am sure it will be a buzz.

LeeD
3939 posts
4 Apr 2020 12:12AM
Thumbs Up

Depend exactly which fin you are thinking of using, but something around 40cm is a starting point.
Don't exceed OFO [width 1 foot up, from tail], but maybe just try it with stock fin.

SongofWind
18 posts
4 Apr 2020 4:18PM
Thumbs Up

I have an Axxis 278. I use Select S1 35 fin. I was using mistral slalom fin (33cm long 270cm^2) before, wide chord and thick profile. It certainly feels more slippery and go upwind better.

Imax1
QLD, 4828 posts
4 Apr 2020 6:52PM
Thumbs Up

Oldie , I think you know the answer , go big , if planing on the fin instead of the board , go down half a cm
We know the saying , " too much power is just enough ".
Could be drinking

olskool
QLD, 2455 posts
23 Apr 2020 6:46PM
Thumbs Up

Songofwind, thanks for info. Im 105kg n 7.5m sail. The mistral fin you have is same as i have. Ive got 38cm FO Nitro, 40cm MFC H1 to try. As usual NO WIND.

RichardG
WA, 3754 posts
23 Apr 2020 7:11PM
Thumbs Up

I have an F2 Sputnik 285 115 litre similar to the Explosion. I use 30-36 cm select powerbox fins. I also use a 36 cm G10 Select trim box fin on my 1992 Bic Presto 280cm, 122 litre LW Slalom. My 1992 Bic Rock 295 cm LW Slalom of 130 litres (which I haven't sailed yet having recently acquired it for $50 including fin and uni and mast foot and extension ) has a World Cup Slalom fin of 11 inches and the biggest fin I have for that is 35 cm (US box). The 40 cm fin for the Explosion sounds rather larger than would have been used in the day on the Explosion. It might be overfinned but try it and see and let us know. The 1996 Mistral Explosion II (successor model to yours) carried 36-38 cm fins with 5.8-7.3 race sails. The Race sails on the Mistral One Design for example..(89-90s vintage) were more powerful in the lower end than sails of today having tighter leeches as I understand it but the top end is less controllable but the top Mistral sailors carried their 7.4 m2 sails in 30 knots on the IMCO for example, so much is possible. Your 7.5 might be a 6.5 in the old days. A good thing about old boards is they don't depreciate like new boards.



Subscribe
Reply

Forums > Windsurfing General


"Old Board, New Fin." started by olskool