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Sep 08, 2019, 05:53 PM
Registered User
For my larger boats, I use 1/8" = 3.175mm brass rod.

For my smaller boats I have used 1/16" = 1.589 mm brass rod.

You can use stainless rod for this as well.
I have no issues with brass over the years.

It also depends on how the control surfae is mounted.
Is it supported at one end of both ends.
If both ends, small rod works fine.
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Sep 08, 2019, 07:38 PM
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tchalfant's Avatar
Quote:
Originally Posted by Neptun
What do you recommend for the rudder shaft dimensions? 2mm?
2mm is fine!
Sep 09, 2019, 02:47 AM
Registered User
will have 2 servos with 2 rods out, so one rod is connected to 2 which controls 2 rudders. a total of 4 rods for 4 rudders.
Sep 13, 2019, 07:05 AM
Registered User
Quote:
Originally Posted by Cliff Hanger
For my larger boats, I use 1/8" = 3.175mm brass rod.

For my smaller boats I have used 1/16" = 1.589 mm brass rod.

You can use stainless rod for this as well.
I have no issues with brass over the years.

It also depends on how the control surfae is mounted.
Is it supported at one end of both ends.
If both ends, small rod works fine.
I run 2mm brass rod from servo to split, after split to rudder 1.5 mm, that is to 4 rudders after split.
Sep 13, 2019, 07:09 AM
Registered User
Ask about ballast!
I have distributed 2 kg ballast in the boat, the water inside the boat does not go all the way up, and it was difficult to weigh in the bow and stern. How have you done with ballast? Kg?
Sep 13, 2019, 07:13 AM
Registered User

Ballast / Water


The boat in water with 2 kg ballast end 600-700 g in technic tube.
Sep 13, 2019, 09:58 AM
Registered User
m_eye_flying's Avatar
Quote:
Originally Posted by Neptun
The boat in water with 2 kg ballast end 600-700 g in technic tube.
I haven't complete a ballast yet. Was attempting an idea to use a motor and syringe bottle to pull and push water out, but from the picture provided not sure if the Sail section is in the right place, but not sure if that matters since you may have extended the hull as well towards the stern counter balancing the location of the sail section. Just not able to determine from the picture. Would like to see your setup in general for build, though I cannot answer why the water is not filling up all the way unless the 2KG ballast is not potentially enough.
Sep 14, 2019, 11:58 AM
Registered User
I think 2 kg is a good foundation, now I have to wet until all the technology is in place to see if more weight is needed. Then there is certainly very little needed. Then I don't know which dive tank to choose.
The technology rack I think weighs a maximum of 1 kg maybe 1.5 kg.
Sep 14, 2019, 12:06 PM
Registered User

Ballast


I have divided 4 weights of 500g into 4 sections in the boat then 2kg ballast in the keel. I glued the weights with epoxy.
Sep 14, 2019, 12:31 PM
Registered User
tchalfant's Avatar
Unless you have tried the WTC with it, I would not glue anything in. If you feel you need to affix the weight, use RTV silicon. It will hold fine, but if you should need to move it, you can easily.
Sep 15, 2019, 01:51 AM
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twwd's Avatar
You guys sure are doing some great work in getting the Gotland to the water! I wish I would have waited a little longer before I glued up my boat for display only, and followed your build ups!

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Are you purchasing your WTC's or are you scratch building your own? Great workmanship, and thank you for posting your builds!!

Rob T.
Sep 16, 2019, 01:09 AM
Registered User
Quote:
Originally Posted by twwd
You guys sure are doing some great work in getting the Gotland to the water! I wish I would have waited a little longer before I glued up my boat for display only, and followed your build ups!

Attachment 12552561

Are you purchasing your WTC's or are you scratch building your own? Great workmanship, and thank you for posting your builds!!

Rob T.
How did you paint the white markings on the hull for the waterline?
Sep 16, 2019, 01:31 AM
Registered User
twwd's Avatar
Neptun

I used 1/2" wide adhesive backed white label making tape, cut to 1/16" X 3/16" strips and stuck to hull! After completion I clear coated the
complete boat!
Sep 16, 2019, 05:07 AM
Registered User

Rudder axle


Now the rudder rods are in place and the rudder rods that the rudder is attached to. I have used 2mm brass rods.


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