mast position on iS145 and a few more Q's

[paulk]

Hello SB team,
I just made my first runs on 'iS145W' (which replaced my old good F155W). The 'iS145W' feels very responsive; planing threshold, upwind / downwind quite nice and easy in marginal conditions - well done SB!

A few questions:
- where should be the mastbase position (the default) for 9.4M 2 cam sail?
- where -"- for 8.0
- is the jybing technique different from Formula board (the response of my F155 was somewhat more predictable to constant 'wide lag' pressure - I guess, I just need to make some small adjustments?)
- should I rinse the board (it's Wood) in a fresh water? (My old F155 got some yellow tint - does it compromise watertightness?).

(I am 75kg, 174cm, footstraps most back-outer position)

Thanks in advance.

[nifty]

Hi Paulk, I'm not team, but try for any rig- mast base as far back as possible without too much tailwalking. When it starts to tailwalk more than a little bit, move it forward half an inch at a time. For the 9.4 with your weight, it can't hurt to try right back, but it may need to be forward an inch or so from the back.

[Roger]

Hi Paulk,
I agree with nifty here, but on the demo Isonic 145 Wood that I have I usually start out in the middle because the mast slot is so short.
To get the best speed, on the Isonics, I've had the track from the middle to the back, but for the best marginal planing, pretty far forward seems to work.
We weigh about the same, so as Nifty suggests, start at the back and move it forward in increments, (esp. if it seems to tailwalk) and you will find a sweet spot for you with your stance and rigs.
The jybing technique is not quite so formula oriented as the F-155.
You still need to step well across, and try to keep the pitch (fore and aft trim of the bottom of the board) trim the same through your jibe as when you planed in to initiate your jibe. So, Maybe a little more of a forward and across step than the F-155 but watch the nose. If it drops and you fall off plane, try applying your rail pressure a little further behind the off side front footstrap.
You should ultimately be able to "tighten up" your jibes a little more on the IS 145 than on your 155.
You can wash the board with fresh water if you like, but it's not necessary.
The yellowing of the wood surface(which is fully sealed and saturated/installed similar to a fiberglass) is caused by UV exposure.
Try to keep your new board out of the sun as much as possible when you aren't actually sailing in.
If you leave it on the beach, turn it over so the wood isn't exposed to the sun.
Hope this helps,

[JGue]

Paulk:how much wind you can stand with your 8.0 and Isonic 145, being confortable?. Thanks.