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Old 02-22-2018, 04:24 PM   #61
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Thanks Jim, those plans and pic look great - and I'm certain that your paravanes will work very well with the poles being in that position. Will you dare to climb up to the lookout while at sea ? The nest sure looks cool

We will see. When standing in the crows nest your head will be 20' off the deck and 32' off the water! I think we will start with climbing to the nest at the dock. We will have a harness system in place for the ladder and the crows nest. Of course, for your YouTube channel we wil have to install a gopro up there permanantly!

I will be looking forward to how your paravanes perform once completed.

Jim
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Old 02-22-2018, 04:36 PM   #62
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Thanks, and that's pretty high up ! A Gopro is a great idea !

Just to help motivate your climbing up there, here's a pic of the very last Norwegian seal-hunt vessel. They used to hunt seals near Greenland, their nest is also tall and windy Harness is a very good idea, btw.

Their last trip (2015) was recently aired on TV, btw - that's why I came to think of it.
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Old 02-22-2018, 09:33 PM   #63
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Cold-smoked, how did you notch your pipe? Band saw?
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Old 02-23-2018, 03:16 AM   #64
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Cold-smoked, how did you notch your pipe? Band saw?

Hi, I use a 5" angle grinder w/variable speed for all the cutting, grinding and sanding.
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Old 02-23-2018, 04:52 AM   #65
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Just playing some more with the overall appearance. This would surely raise eyebrows up here
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Old 02-23-2018, 04:59 AM   #66
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Of course, for your YouTube channel we wil have to install a gopro up there permanantly!

Jim
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I actually thought about this myself a while back, to have a camera high up in the mast with a live feed to a monitor inside the wheelhouse. Our wheelhouse is far aft, so a camera would be great to help see the bow. I guess we would need a tiny wiper/washer for that. I will look into it.
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Old 02-23-2018, 11:07 AM   #67
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Thank you Cold!
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Old 02-23-2018, 11:15 AM   #68
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CS: The guy who did the final design/installation for our paravanes, did a mock up with pvc pipe first. He said he did that for every Installation.
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Old 02-23-2018, 02:59 PM   #69
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CS: The guy who did the final design/installation for our paravanes, did a mock up with pvc pipe first. He said he did that for every Installation.
Yes, that's a good idea. I thought about using 2x2 fir myself, just to play with the shape of it - but I think maybe my drawings will do. I am playing with drawings, actual measurements and photos of the boat from different angles. One of the obvious criteria we have is that we shouldn't bump our heads into the frames when walking past the wheelhouse. One other thing is that the frames and poles (while at rest)must point slighty inward, to avoid damage to them if the boat rolls while being moored next to our quay. The difference between high and low tide here is usually around 2 meters, and 3 meters maximum.
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Old 02-23-2018, 03:15 PM   #70
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Today I cut the poles down to 17 feet, drilled the bolt holes and welded on end caps. Even though it's cold, it's great to work a bit outdoors in nice, crisp and sunny weather. This is the 6th or 7th straight week of lovely dry weather
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Old 02-25-2018, 12:06 PM   #71
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Vanes

Vanes are mostly done, I had to buy one 8 ft x 3 ft sheet of ply - so there's plenty left for spares. I will give all the parts 2-3 coats of epoxy now before I assemble. As lead is hard to find here, and melting old batteries is too much of a hassle - I think I will try these 10 kg/~25 lbs weight lifting plates. Any better ideas ? I think it may work well, but I sure would prefer to have lead. Vanes are close to 300 sq inches, btw.
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Old 02-25-2018, 01:31 PM   #72
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Paravanes boom position?

Can you find a small trolling cannon ball and cut it in half? Google “commercial trolling cannon ball”. Does the Norwegian commercial fishing industry have such things available?the sport fishing stuff is too small.
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Old 02-25-2018, 01:33 PM   #73
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Can you find a small trolling cannon ball and cut it in half? Google “commercial trolling cannon ball”. Does the Norwegian commercial fishing industry have such things available?the sport fishing stuff is too small.

Thanks, but I did look around here for that. It seems the pros here don't use lead much.
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Old 02-25-2018, 02:16 PM   #74
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So you may have to make them yourself. I would really consider the lead half sphere as it is more compact and is more resistant to corrosion. Here is the weight of cannon balls of different diameters.

Volume of a sphere: 4/3*pi*radius^3 (cubed)
4/3*pi=4/3*22/7=4.190, constant for all calculations.
Weight of cubic cm of lead is 11.34 g or 0.01134 kg

Here are my calculations for half spheres of lead of differing radii:
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Old 02-25-2018, 02:36 PM   #75
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So you may have to make them yourself. I would really consider the lead half sphere as it is more compact and is more resistant to corrosion. Here is the weight of cannon balls of different diameters.

Volume of a sphere: 4/3*pi*radius^3 (cubed)
4/3*pi=4/3*22/7=4.190, constant for all calculations.
Weight of cubic cm of lead is 11.34 g or 0.01134 kg

Here are my calculations for half spheres of lead of differing radii:

Thanks, I will think about it. I melted some lead (~8-10 kgs) last year from a bunch of wheel weights, to use as ballast in a RC trawler that I made. So I may just have to do that again. But in case I lose one or both vanes, it would be great to use something which is easy to find here.
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Old 02-25-2018, 02:37 PM   #76
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Errata: The 5th column is mislabeled. Here is the corrected table.
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Old 02-25-2018, 02:48 PM   #77
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Thanks, I will think about it. I melted some lead (~8-10 kgs) last year from a bunch of wheel weights, to use as ballast in a RC trawler that I made. So I may just have to do that again. But in case I lose one or both vanes, it would be great to use something which is easy to find here.
Chuckle! I understand they are still "extracting" stuff from the Tirpitz. I'm sure there's more than enough lead in that keel! That's close to where you are!
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Old 02-25-2018, 02:54 PM   #78
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Chuckle! I understand they are still "extracting" stuff from the Tirpitz. I'm sure there's more than enough lead in that keel! That's close to where you are!
Haha, I said EASY to find !

But you are correct, the remnants of the Tirpitz are very close to where I live.
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Old 02-25-2018, 07:04 PM   #79
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My fish are made of galvanised steel and the main weight is a steel bar (also galvanised).

This picture was taken when I first got the boat and had not installed the lifting tackle yet. The steel bar sits in that circular piece of aluminum which holds the fish very securely.
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Old 02-25-2018, 08:28 PM   #80
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My fish are made of galvanised steel and the main weight is a steel bar (also galvanised).

This picture was taken when I first got the boat and had not installed the lifting tackle yet. The steel bar sits in that circular piece of aluminum which holds the fish very securely.

Thanks, Xsbank. Your vanes look big, how much do they each weigh ? For my wooden hull I think it's wise to use softer materials, and I've rounded off all the edges a little. I just put on two coats of epoxy to the ply, curious to see if it will last. HDPE is probably a good alternative to ply.
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