Mast selection

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> 10 years ago

General Gps & Speed Waves Foiling Gear Reviews Lost & Found WA NSW QLD SA VIC TAS

SimonM

126 posts

SimonM

WA, 126 posts

20 Apr 2004 8:04am

Hi all,

I have just got hold of several small sails, and I am now in the market for some 400/430 masts. The 4.2, 4.7 amd 5.3 sails recommend 19, 19 and 21 IMCS respectively. I have had an offer of a vgc. Powerex 430x30%xIMCS25 for $100. I am not sure whether or not to buy this mast because of its 25 IMCS rating. What are people's thoughts on the importance of the IMCS rating? Cheers

-Simon M

laurie

QLD

3902 posts

laurie

QLD, 3902 posts

20 Apr 2004 11:40am

If it was me, I'd avoid the 25 - way too stiff .. it is for the shorter slalom/freeride sails.. the difference is very noticeable.

Enjoy .. Laurie

Ian Lane

52 posts

Ian Lane

WA, 52 posts

20 Apr 2004 8:46pm

a 430 with an IMCS of 25 is not neccesserally a stiff mast. if its MCS was 25 then it would suit a race sail (older style) but it is unusual to find a curent 430 with an MCS of over 21.
IMCS is Indexed to a 460 so if a 430 with an IMCS of 25 was extended to 460 its stiffness would be 25. but if its MCS was say 21 (usual) and Imcs 25 then it would be 21 as a 430 and 25 as a 460.
Clear as mud?

SimonM

126 posts

SimonM

WA, 126 posts

21 Apr 2004 3:18pm

Thanks Ian, you set me on the right track.
But after a bit of hunting around here is some clarification..

IMCS = (MCS x (Length)^2) / (460)^2

ie a 'normal' 430 mast would have an MCS or 25, and an IMCS of 21

-SimonM

SimonM

126 posts

SimonM

WA, 126 posts

21 Apr 2004 3:19pm

I will get the 430 mast hopefully, but I am still after a 400. So if anyone has one they'd like to sell, give me a ring....

0438880480
-Simon M

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