New project - Neptune - a fantasy boat project

[He Who Shall Not Be Named]

Any photos or videos?

How about you... got any photos or videos of your work to share?

... anything?

David
Provocateur Extraordinaire

[DrSchmidt]

Sorry, no....

[redboat219]

Any photos or videos?

[DrSchmidt]

It works.....I run it from time to time.

[redboat219]

Any updates?

[DrSchmidt]

I use a peristaltic pump to pump water in and out the ballast tank. So the snorkel's only job would have been leveling inside and outside pressure in case I accidentally keep the pump on too long and not only drain the water from the ballast tank but also air from the WTC, thereby creating a vacuum.

[redboat219]

Actually I removed the snorkel. It's easy to see when the ballast tank is empty and to stopp the pump in time.

Cheers Andreas

Oh. Was hoping to get some feedback from you if it prevents ingress of water into the WTC. I have one of those mini air pumps I took out of a broken digital sphygmomanometer that I want to try and use as a low pressure blower, unfortunately it only has the outlet nipple. No visible intake port to attach the snorkel induction tube. Plan is to attach the snorkel intake with float valve directly to the wtc then let the airpump suck the air inside the wtc to blow the ballast tank, something like on a real submarine.

[DrSchmidt]

Actually I removed the snorkel. It's easy to see when the ballast tank is empty and to stopp the pump in time.

Cheers Andreas

[redboat219]

I've been lazy, but finally I made some final adjustments. As mentioned above, I have added one of David's excellent snorkel valves to the WTC to avoid the creation of a vacuum by the peristaltic pump. I've added a guide rod to the flaot of the valve to dial in its position. Next is trimming.

Hello,
I just want to ask you if you , did you put any water catcher under your snorkel to catch any stray water droplets that could get sucked in through the induction pipe?

[DrSchmidt]

I've been lazy, but finally I made some final adjustments. As mentioned above, I have added one of David's excellent snorkel valves to the WTC to avoid the creation of a vacuum by the peristaltic pump. I've added a guide rod to the flaot of the valve to dial in its position. Next is trimming.

[DrSchmidt]

Yes, the pump vents into the WTC, but: Peristaltic pumps also pump air. If you empty the ballast tank long enough, i.e. too long, the pump will create a vacuum in the WTC. To avoid the vacuum, I've attached a snorkel valve on the WTC that equillizes the pressure between inside and outside when surfaced.

[redboat219]

Any photos?

Wait, a snorkel valve? I thought this uses a peristaltic pump that fills and empties a tank that vents into the WTC?

[DrSchmidt]

The WTC and the diving system are working fine. I added a snorkel valve and I just need to add a guidance for the float of the valve. Then everything is ready for trimming.

[DrSchmidt]

Started printing parts for my version as well. But I doubt that it'll work right away. Might need some iterations....

[He Who Shall Not Be Named]

Good news, WTC is water tight and the ballast system works fine! Just the snorkel missing and then trimming.

Gotta get those off to you -- long ago promised, but life got in the way. This week, I promise.

David