Forums > Land Yacht Sailing Construction

First build basics

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Created by SeasickSav 2 months ago, 19 Aug 2017
seabrit2
22 posts
30 Sep 2017 9:10AM
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Sylk
WA, 197 posts
30 Sep 2017 1:06PM
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You mean this therad I think?
www.seabreeze.com.au/forums/Land-Yacht-Sailing/Sail-making/Cam-batten-windsurfer-sails?page=1

I like what you have done with your mast base but im not shore it will work with modern wind surfer sails my mast base and reinforcing extension slide inside the mast not outside but let us know how you go.

seabrit2
22 posts
2 Oct 2017 6:43AM
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The only issue I see is sail and boom rotation with 6:1 downhaul back to the chassis (lots of mast bend and downhaul tension). Hiko suggests that it will not be a problem as sail rotation not that great. If too restrictive I shall consider a clamp on the mast to attach the lower block.

Chook2
WA, 1173 posts
2 Oct 2017 6:37PM
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Select to expand quote
seabrit2 said..
The only issue I see is sail and boom rotation with 6:1 downhaul back to the chassis (lots of mast bend and downhaul tension). Hiko suggests that it will not be a problem as sail rotation not that great. If too restrictive I shall consider a clamp on the mast to attach the lower block.



I totally agree with Hiko it will work fine, as my yacht was like this for a good while.
The advantage of this setup is in the event of an upset the mast is retained to the chassis of the yacht.

With my downhaul anchor attached to the bottom of the mast (on it's internal stalk) it has a lot less friction, as it all rotates as one fixed unit. (sail, mast, boom and downhaul). But....... I've had the mast rise up slightly on it's mounting in one of my high speed crashes where multiple rotations were involved.

seabrit2
22 posts
4 Oct 2017 12:15PM
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Chassis complete, now working on a stitch and glue seat, hmmm more questions !!
i am 5'11" and mocking up the seat I notice that if I put my back full against the backrest I cannot gain good purchase on the pedals. It seems from sailing pics that most people sit with there bums far forward of the rear axle. I am tempted to move the backrest forward and maybe change the incline or make adjustable. Since I have never seen a yacht in the flesh never mind sail one !! Where is the idea C of g for the sailer ?? I am guessing waist approximately 8" forward of the rear axle. Thought ??

lachlan3556
VIC, 1037 posts
4 Oct 2017 4:21PM
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From memory, I am about the same height as you and usually aim to have by belly-button in line with the rear axle, though the front end does get a bit light sometimes Maybe to start with just make it comfortable to use the pedals and then later on test how far back you can slide before loosing control

The key is to slouch like crazy

I've also found, to be comfortable, I like my backrest to only support my shoulders and head. Imagine lying flat, and then just putting a pillow under your head so you can see forward. This low position will of course obstruct your vision. Go with what feels comfortable....but don't forget some support for your head (so your neck doesn't start hating you after a few hours sailing!).

Chook2
WA, 1173 posts
4 Oct 2017 4:23PM
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lachlan3556 said..
I've also found, to be comfortable, I like my backrest to only support my shoulders and head. Imagine lying flat, and then just putting a pillow under your head so you can see forward. This low position will of course obstruct your vision. Go with what feels comfortable....but don't forget some support for your head (so your neck doesn't start hating you after a few hours sailing!).


Yeh that's really important as the helmet does get heavy after 3 or 4 hours sailing. Roy made that comment last time at Lake Lefroy.

I'm still using these that I made when I first started sailing. They are REALLY comfortable for old bones.

This is the link below.
www.seabreeze.com.au/forums/Land-Yacht-Sailing/Construction/Building-a-seat-cushion-from-carpet-underlay#931973

seabrit2
22 posts
5 Oct 2017 1:57AM
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Thanks guys for your useful insight, It seems that for support and comfort I will need to bring the seat back forward to put my navel on rear axle center line (with some wiggle room of course). The idea to make custom fitted mats out of carpet underlay is excellent. I should be able to contour my flat ply seat for support and comfort.

seabrit2
22 posts
8 Oct 2017 8:12AM
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4.6m cam batten rigged for the first time, 5 degree rake, hopefully when I get a boom rigged a little out haul and puff of wind will straighten the wrinkles. I need to make a longer boom by about 300mm. On the right track ??






Chook2
WA, 1173 posts
8 Oct 2017 12:57PM
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That's looking fantastic!!!
Top effort there.
Look at the aerofoil shape to the sail without a sheet rope even attached, just brilliant.
This sail should set up really well. If you need more head clearance with the boom, don't worry too much if the bottom batten ends up sitting down past the boom, as the windsurfer sails adjust with downhaul more than sheeting pressure. (Your mast rake adjustment should solve it anyway)

Look forward to a sailing update. If it is a bit light on the steer, just lean forward to get more weight over the front end when turning.

Hiko
1143 posts
9 Oct 2017 3:29AM
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+1

Sylk
WA, 197 posts
9 Oct 2017 2:23PM
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Looks pretty dam good to me.
Well done go forth and sail.

lachlan3556
VIC, 1037 posts
11 Oct 2017 11:22AM
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Jeez, I think I need to try one of these windsurf sails 'raw' for myself pretty soon!

Looking the goods seabrit.



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"First build basics" started by SeasickSav