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Unregistered
8th February 2008, 01:48 AM
An 100kg apollo happy user is thinking about a 80 cm fin to put into apollo during light air racing.. RS6 12.5 sometimes is not enough to get going and a powerfull fin could be an interesting option I believe.

Would R19 medium 80 cm, rake + 8cm would fit this combo? Remi would you please follow up? Time ago you reccomend 75cm as a maxium. Why not to go for 80 cm during fun racing when the middle-european summer starts. You should have some experience...

Any valuable comments would be welcome.

Kind regards

Tomi

pfaffi
9th February 2008, 02:59 PM
Hi Tomi!
For my weight of 92kg and 184cm I use a powerful 70cm with the Apollo 07. In my mind the 75 as soon I am planing is to big (to much area) and limits my speed. I can imagine in constant low wind conditions when you are always on the limit of planing a 80cm can help. But much more efficient is a powerful tip (last 20cm) to produce the lift and tourge you need. Most fins are shaped much to flat in this section.
best regards peter

Remi
10th February 2008, 09:37 PM
Hi Tomi,

We try already a R19 75 soft - - rake + 8cm, and the results wasn't good. So the R13 75 soft rake + 8cm is enough for light winds. So with your 100 kgs that will be enough.

All the best

Unregistered
11th February 2008, 05:43 AM
I use a 85 cm Curtis on a custom board larger than the Apollo, it is an older less powerful foil that isn't very precise, but it is slippery. It's early planning is great and balances great with a 12.5 but I think the foil twists too much. You really have to let the board follow the foil, or it can get slow. It will pull you downwind and then push you upwind as the tip twists (not just flex). In flat water (building breeze) and smooth wind it can be great. On that long a lever seems flex is good and twist is bad. Just guessing really.

pfaffi
13th February 2008, 07:19 PM
I have made underwater video of my own developed 70cm F1 H+ fin using the Apollo in flat water. It shows: Flex up to 20cm to one side. The angel of attack is between 1 and 4 degree, so you can imagine how tip twist can influence all! At the downwind you will find 1 to 2 degrees and upwind 3 to 4. (If anyone is interested I will place the fin video to youtube)
br peter

Expander
13th February 2008, 08:10 PM
I have made underwater video of my own developed 70cm F1 H+ fin using the Apollo in flat water...If anyone is interested I will place the fin video to youtube...



Yes, I think your underwater video showing flexing / twisting fins will be of extreme interest.

Please Peter, share it with us.

- Exp.

barks
14th February 2008, 01:45 AM
(If anyone is interested I will place the fin video to youtube)
br peter
YES PLEASE. This would be very interesting to see.