New project - Neptune - a fantasy boat project

[He Who Shall Not Be Named]

What do you mean about "full flying stern planes"? And with respect to the servo....well, I did some research on the net and found some good feedback on SAVOX servos. So I'll give it an try.

On full-scale, combat submarines you just don't see entire surfaces dedicated to pitch control (other than X-tails). Convention is a split between fixed stabilizer and movable stern plane. A variation is the Nautilus where you see the fixed horizontal stabilizers integrated into the stern tubes, with the stern planes just aft of the screws.

But, this is a 'fantasy' submarine, so it's your call, Andreas.

David

[DrSchmidt]

What do you mean about "full flying stern planes"? And with respect to the servo....well, I did some research on the net and found some good feedback on SAVOX servos. So I'll give it an try.

[He Who Shall Not Be Named]

A good, sound design. And executed with your usual precision and rational. Don't know about the full-flying stern planes -- a bit much, me thinks. And it's been my experience that those 'water-tight' servos ... ain't!

David

[DrSchmidt]

Same for the bow planes:



The sail is modern and simple:

[DrSchmidt]

I haven’t been lazy building, just lazy making photos of the build. Therefore, without many intermediate steps the current status of the Neptun build, my little fantasy boat.

The moulds are done and I laminated the first set of grp parts from the first boat. The rest is a bit of resin and 3D-printed parts. The prop is from the Prop Shop:










Neat little boat. Just the lower rudder is missing in the pictures.

The deck is removable. The WTC ha progresses quite far:



The rear part of the WTC is locked into two horizontal pins, which are glued into a grp bulkhead. Similar but vertical pins lock the deck into place:



The bow section of the WTC is secured with a single M$ screw. Right in the front an additional vertical pin for the deck positioning:


The stern tube was installed within 5 minutes:



1,5 mm thick grp sheets provide additional alignment of the deck. The bulkhead in the bow section will hold the watertight servo for the bow planes:



Thanks to 3d-printed parts from Shapeways the interfaces between the planes and the hull are perfect without the need for filling and grinding:

[DrSchmidt]

The electronics is comparable to the Engel BTS but I got it from Norbert Brüggen (http://modelluboot.de/) together with the whole ballast system. The switch I got from a German online electronic vendor called Conrad Electronics, because the Brüggen one was too big for my purposes.

[Albion]

Is that the Engel BTS and pressure switch you are using? Where did your final pressure switch come from?

[greenman407]

So you have a problem with time also, seems Universal. Beautiful work. The WTC looks fantastic! First rate.

[DrSchmidt]

Found some time during the last weeks to make some moulds......

[DrSchmidt]

And done:

[DrSchmidt]

First pictures of the masters:

[DrSchmidt]

Well, as the guy who milled the masters for my other boats doesn't have the capacity to mill the masters for this boat, I looked and found a new one and will give him a try. I'll be wiser in a few weeks. The final result should look somewhat like that:

[DrSchmidt]

Slowly everything falls into place. The dive controller is screwed in place and I started wiring the whole thing:



The hoses are hooked up. The overpressure switch is new, not the one I got with the controller, as latter was too big. The new one fits tightly into place below the dive controller. The hose to the pressure switch starts in a T nipple and is routed over the pump motor to ensure that no water reaches the switch. And it looks cool....



The battery rest on two 2 mm thick GRP planks:



This way the battery can easily be fixed with cable ties:



The gap between battery the GRP deck has the advantage, that in case anything gets wet, the battery can easily dry. And the gap is well suited to route cable ties to fix additional gear:



e.g. the receiver. It will simply sit on top of the battery:

[DrSchmidt]

During the week I glued together the part of the inner strcuture. The pump is screwed to the support frames. Behind it sits the pump controller on a 2 mm thick GRP board. The free space will hold the rubber sack for the water. Then the LiPos and behind them the two servos for the aft planes.

[DrSchmidt]

Well, a quick snap together of the inner structure:



The end plate of the peristaltic pump has been trimmed to fit the PU cast supports:



Everything is held together by two 4mm diameter GRP rods and a 5 mm diameter brass tube, which also serves as water intake for the pump:



Well, basic inner structure done in about 1 hour - had worse deals than that: