View Single Post
Old 2nd March 2007, 09:49 AM   #6
CarlosD
Member
 
Join Date: Feb 2007
Location: Buenos Aires Argentina
Posts: 33
Send a message via MSN to CarlosD
Default RE: isonic 111 - trouble with back foot

Hi Matt,

I agree with Geo that probably you are using very small fins for your height/weight. I´m sailing my new IS111 mainly with a Code Red 7.7 and I found that the 36 cm fin is okay while sailing well powered (+ 14 knots) I am weighing 89 KG. (1,85 tall)
Since your weight is around 100 KG you would need more fin surface in order to obtain enough lift. (38/40 for the 7.8)
As you are using the boom in the highest position you are obtaining a high proportion of the lift throught the vertical component of force produced by the sail (wich is probablly too much leaned windward) this means that you are losing forward performance.
I guess that if you try to use the boom in a lower position, with long harness lines and a bigger fin your sailing performance will improve, not only with the 7.8 but with all your sails.
then you can trimm the straps and the mastfoot positions.
Here you can see the opinion of kevin Pritchard as regards boom height and harness lines (he is a tall guy too)

http://www.star-board.com/forum/viewthread.php?forum_id=8&thread_id=21277

http://www.star-board.com/forum/viewthread.php?forum_id=8&thread_id=21292

I hope this will help you, sorry for mi poor english :|.

Best Regards

Carlos
__________________
The chassis:
Isonic 2009 122/101/86 , F2 Mauiproject W 90 lts

The motors:
Slalom: Code red 8.8 NP RSR 7.8/6.7 evo/6.2 evo NP RS6 5.4
Wave: NP zone 4.4 North Ice 4.7/5.3

The rider: Age 48 (yeah, I know, so old, but still on form)
Height 1,84 m
Weight 87 kg
CarlosD is offline   Reply With Quote