Hello all,
In my previous post I showed a video of the new servo control at work, here is a photo of the setup. At this moment I'm considering moving to continuous rotation servo's with AS5600 sensors for feedback for moving the thrusters because these are so much smaller then the steering motors which I've now replaced. I'm also considering this option for controlling the cranes, most of all the main crane because that might well require too much power to turn for the small reduction gear motors I currently have connected for that purpose.
The time has now come to start working on the new hull, here I'm drawing out the frames so I can get my saw to work. I decided to make the mold in 4 parts and place wooden plates in between the 4 parts beforehand as if I've cut the hull in 4 pieces so I don't need to wait for 3 days until the epoxy on the first part has properly cured and then risk slightly misaligning the wood for the second mold. I will now have 2 perfectly straight and 100% fitting connection lines between the molds. The flip side of this decision is the especially the front most part of the bow risks not being as nicely round at the centreline, which I will compensate for by adding 2 full layers of 200gr fibreglass, 5cm wide along the merge between the 2 molds so I have room to make it perfect afterwards without risking making it a weakness. I might well do the same in the critical areas in the stern as well.
On this plank I will construct the hull, I started drawing lines where the frames will go, taking into account the 4cm thick styrofoam which will fill the gaps between the frames.
All the frames have now been cut out and I've glued blocks of wood onto the lines to provide some guidance for placing the frames. Here I've already made 2 mistakes which I will point out below the corresponding pictures.
The wooden plank I will use to shape the styrofoam and after that to check the shape.
Here I corrected the first mistake at the point where the mistakes where the most critical. I raised the hull by 60 1:1 cm's, so 8mm on my scale so having the wooden framing extend ahead of the bow with much more then 8mm would cause considerable problems in shaping the bulwark properly. The same mistake also extended to the stern though there the bulwark remains a full deck lower so it doesn't cause any issues there other then the slight inconvenience of having this odd shape in 1 mold so it will not align is well as I'd like it to be.
The second mistake I corrected while it was still quite easy. It's the wooden blocks behind the rear most frame which is the very stern of the ship. Leaving these wooden blocks in place would have made releasing the mold very difficult indeed.
I started filling up between the frames with styrofoam, though I did get a bit further then shown here by now.
Considering the softness of the foam I will apply a layer of GRP before making the molds to ensure a good quality mold.
Greetings Josse
Author
Topic: Re: Diving support vessel Well Enhancer scale 1:75 - v2 (Read 127493 times)