My prototype of a semi-aspirated ballast tank system

[redboat219]

I was looking for some other RC model submarines sites when I stumbled over this Russian site.

http://babelfish.yahoo.com/translate_url?trurl=http%3A%2F%2Fwww.ubootmodell.ru%2F&lp=ru_en&.intl=us&fr=fptb-msgr

Correct me if I'm wrong but the sub shown here seems to use a similar semi-aspirated ballast system.
Instead of the float valve they used a servo operated valve.

http://babelfish.yahoo.com/translate_url?trurl=http%3A%2F%2Fwww.ubootmodell.ru%2Fkruglow%2Fkruglov.html&lp=ru_en&.intl=us&fr=fptb-msgr

[Kazzer]

I was looking for some other RC model submarines sites when I stumbled over this Russian site.

http://babelfish.yahoo.com/translate_url?trurl=http%3A%2F%2Fwww.ubootmodell.ru%2F&lp=ru_en&.intl=us&fr=fptb-msgr

Correct me if I'm wrong but the sub shown here seems to use a similar semi-aspirated ballast system.
Instead of the float valve they used a servo operated valve.
http://babelfish.yahoo.com/translate...s&fr=fptb-msgr

Links don't work. Probably due to Babelfish translator??

[redboat219]

Hmmm. Links working on mine. Here's the original post in Russian.

http://www.ubootmodell.ru/kruglow/kruglov.html

[Slats]

Well said it before - I am sure this had been done before....

There is definitely a float valve concept there, and definitely a couple of ballast alternatives, but guys this whole exercise I have proved thus far that yes it works and more to the point why would you bother given the alternatives. I could spend another umpteen hours perfecting the part failure, but why would I waste my time. In my profession as an Economist this is the law of diminishing returns at work. The returns being the "utility" or satisfaction that I get from using my time and money on this exercise. In short I get more satisfaction from doing something else. I did say that I like experimenting, but there is a limit to a sensible outlay of time and money. There is a point therefore where positive utility becomes negative. If you are thinking of replicating what I have done here to save money over an off the shelf product think again.

If you want a system that is "simple, strong, and works" just buy a bloody SD and be done with it.
This hobby is infested with creative thought - great on one level, especially when it comes from those who have done the miles, but sad on another when those who haven't want to reinvent broken wheels.

Go on an economy drive in this hobby to build your own system and it will cost you a packet, budget however for buying off the shelf quality products fully backed by their manufacturer and supplier and you will have a cheaper more enjoyable time. Your returns / satisfaction will be higher - it will be more enjoyable.

Don't like the sticker price of those off the shelf products, -pick a "cheaper" more satisfying way to spend your time. This hobby costs money and time, both are valuable I hope to you.
J

[Kazzer]

Build your own cylinder was touted and sold to me when I (a real greenhorn) started my own first boat. It was a disaster, fraught with problems. I still chuckle at the vent valve I was sold, it looked more like a Nodding Donkey In a Texas oilfield.

Here is an article on ballast systems and another article Make Your Own WTC I hope they save you some heartaches!

[macrylinda1]

Ballast tank pickup:
6mm elbow vac fitting joint -position glued in place with CA first and then permanently fixed in the PVC tank with Bostik "Titan Bond" 2 part glue. Got this part form automotive supplier cost for two units in the one pack around $4A

Conduit through tank:
22mm OD PVC conduit - glued in place with PVC cement - gap sealed with CA or Titan Bond- Conduit sold in 1m length around $4A

3.5" End caps
- had some here for mounting the pump / solenoid too. You can buy them from Caswell - cost is around $21US each - know as a Forward end cap (FEC35 Forward End Cap 3.5") see http://www.caswellplating.com/models/bulkheads.html


___________________
watch free movies online