Forums > Land Yacht Sailing Blokarts

Newbie needs help about mast section sizes

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Created by Gliderpilot Monday, 16 Apr 2018
Gliderpilot
3 posts
Monday , 16 Apr 2018 3:39AM
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Hi everyone.
Andy here from the UK.
I have just bought a second hand Blokart which has a 3mtr sail with a 4 peice mast. I am thinking of making a couple of extra larger sails by converting my old winsurfer sails.
For the 4 mtr sail, I would like to know whether I just need an extra mast section or a longer original one and if so which one and what length is it?
For the 5.5mtr sail same questions?
Do I need a longer boom for these bigger sails?

Thanks
Andy

BenBoulder
WA, 251 posts
Monday , 16 Apr 2018 7:27PM
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430/21imcs works well with the 4m sail may need a 460/25 for your 5.5m

with blokart sails the boom always the same length from 2m-5.5m sails.

Gliderpilot
3 posts
Tuesday , 17 Apr 2018 2:01AM
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Select to expand quote
BenBoulder said..
430/21imcs works well with the 4m sail may need a 460/25 for your 5.5m

with blokart sails the boom always the same length from 2m-5.5m sails.


Thanks for the reply.
I do not know what 21imcs means.
I'm interested in knowing what the sections are called for each size mast and what length they are.
I know there is a bottom, 3rd, 2nd, and top for my 3 mtr sail but to make my mast suitable for a 4mtr and a 5mtr sail, what are the sections used to make the mast longer. I believe there are 5 sections for the 4mtr and 6 sections for the 5.5mtr.

BenBoulder
WA, 251 posts
Tuesday , 17 Apr 2018 6:41PM
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Sorry my bad I thought you wanted to use windsurfer mast as well as sails on on your blokart.

imcs is how stiff your mast is

i think each blokart mast section is 900mm

GeoffSobering
58 posts
Tuesday , 17 Apr 2018 10:34PM
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Select to expand quote
Gliderpilot said..

BenBoulder said..
430/21imcs works well with the 4m sail may need a 460/25 for your 5.5m

with blokart sails the boom always the same length from 2m-5.5m sails.



Thanks for the reply.
I do not know what 21imcs means.
I'm interested in knowing what the sections are called for each size mast and what length they are.
I know there is a bottom, 3rd, 2nd, and top for my 3 mtr sail but to make my mast suitable for a 4mtr and a 5mtr sail, what are the sections used to make the mast longer. I believe there are 5 sections for the 4mtr and 6 sections for the 5.5mtr.


"3rd" sections are used to increase the length of the blokart mast.

For example:
4.0m sail: Base-3rd-3rd-2nd-top
5.5m sail: Base-3rd-3rd-3rd-2nd-top

Note that you can make a stiffer tip by removing the "top" section, adding an additional "3rd", and using the "Masthead Crane" to attach the sail to the 2nd at the top of the mast.

Also, for sails larger than 4.0m, blokart recommends using carbon sections for at least the bottom two pieces.

Cheers,

Geoff S.

Gliderpilot
3 posts
Wednesday , 18 Apr 2018 2:15AM
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Select to expand quote
GeoffSobering said..

Gliderpilot said..


BenBoulder said..
430/21imcs works well with the 4m sail may need a 460/25 for your 5.5m

with blokart sails the boom always the same length from 2m-5.5m sails.




Thanks for the reply.
I do not know what 21imcs means.
I'm interested in knowing what the sections are called for each size mast and what length they are.
I know there is a bottom, 3rd, 2nd, and top for my 3 mtr sail but to make my mast suitable for a 4mtr and a 5mtr sail, what are the sections used to make the mast longer. I believe there are 5 sections for the 4mtr and 6 sections for the 5.5mtr.



"3rd" sections are used to increase the length of the blokart mast.

For example:
4.0m sail: Base-3rd-3rd-2nd-top
5.5m sail: Base-3rd-3rd-3rd-2nd-top

Note that you can make a stiffer tip by removing the "top" section, adding an additional "3rd", and using the "Masthead Crane" to attach the sail to the 2nd at the top of the mast.

Also, for sails larger than 4.0m, blokart recommends using carbon sections for at least the bottom two pieces.

Cheers,

Geoff S.


Hi Geoff,
Thanks for the detailed info, just what I was looking for.

Regards
Andy

bryan
WA, 117 posts
Saturday , 21 Apr 2018 6:43PM
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The boom on the 5.5 m sail is about 200mm longer than the boom on the 2,3,&4 m sails



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"Newbie needs help about mast section sizes" started by Gliderpilot