I currently have a 4.7. and 5.5m sail and given that I'm 6'4" and 85kg-ish I figured a bigger sail would be useful. What size would everyone recommend, my current thinking is around a 7.5m as I would like to be able to get out in 15ish knots. Thoughts?
Assuming you are talking a 90-100L freeride type board and sails, (which would probably suit those sails). No good getting a bigger sail without a bigger board. If your current board is less than around 110L, you won't get much advantage, and I am guessing that for your weight, 120L+ would be better.
And you will also need a bigger fin. 
Knowing your board situation is critical for an objective opinion. A 2m jump in sail size is big and likely will not make sense regardless of the board or boards you have. However, if you want to plane in 15 knots with a 7.5, you will need a somewhat wide board between 115 and 130 liters. The type of board will also make a difference. A 6.5 sail is probably the most common sail size for intermediates covering 15 knots for lightweights to 20+ knots for heavyweights.
Are you still in Tasmania Maui Meyer?
If you are get in touch- maybe try some out at Lagoon one day.
Clarence
My board is currently at the girlfriends place so once I go grab it I'll be able to confirm what it is. I believe it is a 110-120l board but I'm not sure. When i get home I'll also measure the fin.
Sounds like maybe a 6.4 would be the way to go. Select to expand quoteclarence said..
Are you still in Tasmania Maui Meyer?
If you are get in touch- maybe try some out at Lagoon one day.
I've moved to Melbourne unfortunately/fortunately (depends which way you look at it i spose 
) but thanks for the offer
loftsails.com/blog/tips-for-building-a-windsurfing-sail-quiver
You can jump 1.5-2 meters . Even use an RDM 460, so no need for an SDM extension (I presume yours is RDM).
Just gave that article a read, very useful information!
I do have an RDM, i believe 430. Will probably have to get a bigger mast with a sail upgrade.
Select to expand quoteMmeyer said..
Just gave that article a read, very useful information!
I do have an RDM, i believe 430. Will probably have to get a bigger mast with a sail upgrade.
Severne Turbo 7.0 rigs on a 430 rdm
Also: www.windsurf.co.uk/all-a-quiver/
17-18 knots is the magic number - can still hold onto big sails, but can already get going on small ones.
I have a 5.3 blade pro. My next size up is a 6.5m severne turbo.
On a 105l board.
Im 73kg
that gap works perfect for me because the turbo has a cam. It can handle 25knots in the bay. Bloody fast. But I can also get it planning in 15 knots.
Given you are bigger than me, get a 7.0 turbo
So turns out the board isa~140L Fanatic Bee. Didn't realise it was that big, could be a bit rough out in the chop. Shouldn't have any issues with a bigger sail. Got me thinking though, maybe I should be thinking about a new board before more sails. Maybe a 105ish freeride or something. Thoughts?
If your going bigger in sails you should also think about the fins you run. Also have a look at what your mast and boom can support, miight help with your decision unless you are happy to add to these as well.
You could use a 8.0 sail on that ...
but yes ...look for a smaller board ..105-115 ..but keep that Bee for your big sails ..
And a good 7.0 .-7.5 ..no cams are easier to use ...
Select to expand quoteTardy said..
And a good 7.0 .-7.5 ..no cams are easier to use ...
True, but he got a 5.5 to jumped to. Depend what is your level, if you are a very good sailor you can go in freerace board and sail and you will be able to reach the gap with just a 7.0 or even a 7.5. I'm 68 kg and I pass from a 7.8 Slalom sail and a 107L slalom board to 5.3 powerfull sail and a 100L freestyle easily. With a no cam, that would be a bit harder and a 7.0 max I guess? Easier to handle and rig also(no cam).
