Russian Alfa Class

[rwtdiver]

The Russian Alfa is finished! I used one of my custom built cylinders for the propulsion system!



Hope you all enjoyed the build blog, and I thank you all for your input!

Rob
"Firemen can stand the heat"

[rwtdiver]

I am going to re-open my Russian Alfa boat design and re-build again! As per the last results with my Piston Tank design that would not fit into the 1:72 scale hull design, I am going to try utilizing a "Vented (low pressure) Ballast System"



I have laid up a drawing based somewhat on the design in "Bob Martins" new book! This system will be going into a new 1:72 Scale Alfa 3D printed boat. This will be my own scratch built WTC and ballast system design.

The design is somewhat basic at this point. I have listed above 4 possible pumps that may or may not work for this design. With this in mind, I would really like some input as to my principal design and function!
Also in looking at the pumps I have, which one might work the best for this design!

Thank you all for your help!

Rob
"Firemen can stand the heat"

PS: I am done with building "Target Boats" sort of boring for me! Another lesson learned again!!!

[redboat219]

Check out Nate He's Blueback.

[He Who Shall Not Be Named]

I am going to re-open my Russian Alfa boat design and re-build again! As per the last results with my Piston Tank design that would not fit into the 1:72 scale hull design, I am going to try utilizing a "Vented (low pressure) Ballast System"



I have laid up a drawing based somewhat on the design in "Bob Martins" new book! This system will be going into a new 1:72 Scale Alfa 3D printed boat. This will be my own scratch built WTC and ballast system design.

The design is somewhat basic at this point. I have listed above 4 possible pumps that may or may not work for this design. With this in mind, I would really like some input as to my principal design and function!
Also in looking at the pumps I have, which one might work the best for this design!

Thank you all for your help!

Rob
"Firemen can stand the heat"

PS: I am done with building "Target Boats" sort of boring for me! Another lesson learned again!!!

Gonna have to be a gear-pump if you want it to move water both ways.

Or a one-way pump that leaks during the 'flood' cycle, which means a centrifugal type pump. You'll have to provide a servo/solenoid actuated vent valve, and a 'pinch-valve' to keep water from back-flooding the tank through the pump when on the surface.

Welcome back to the Dark Side, Rob.

David

[rwtdiver]

Gonna have to be a gear-pump if you want it to move water both ways.

Or a one-way pump that leaks during the 'flood' cycle, which means a centrifugal type pump. You'll have to provide a servo/solenoid actuated vent valve, and a 'pinch-valve' to keep water from back-flooding the tank through the pump when on the surface.

Welcome back to the Dark Side, Rob.

David

Thanks for checking in David.

If I understand you correctly the system in the photo below using 2 micro switches and servo connected to the pump to pump water in and then reverse the pump to pump water out.!?



This was the system I used on the piston ballast system! So instead of a piston, I would be using a pump to move water in or out!?

Rob
"Firemen can stand the heat"

[He Who Shall Not Be Named]

Thanks for checking in David.

If I understand you correctly the system in the photo below using 2 micro switches and servo connected to the pump to pump water in and then reverse the pump to pump water out.!?



This was the system I used on the piston ballast system! So instead of a piston, I would be using a pump to move water in or out!?

Rob
"Firemen can stand the heat"

If what you have there is a gear type pump (which is reversable), and the switches are for polarity swapping, then that's all you need (and the fixed vent, of course).

David

[rwtdiver]

If what you have there is a gear type pump (which is reversable), and the switches are for polarity swapping, then that's all you need (and the fixed vent, of course).

David

Thank you for getting back to me David. I really appreciate all your expertise and input!!





Would this pump be considered a geared pump? It came out of a Krick U-Boat kit.

Thanks again for your time David!

Rob
"Firemen can stand the heat"

[He Who Shall Not Be Named]

Thank you for getting back to me David. I really appreciate all your expertise and input!!





Would this pump be considered a geared pump? It came out of a Krick U-Boat kit.

Thanks again for your time David!

Rob
"Firemen can stand the heat"

Yup.

David

[rwtdiver]

Yup.

David

Thanks David!

I am going to do another updated drawing as to how all the components will come together. I would appreciate your comments on it and if you think my design might work.

Rob
"Firemen can stand the heat"

[He Who Shall Not Be Named]

Your initial sketch had it right: a reversable pump plumbed directly to the bottom of the ballast tank, and a vent up high in the sail. That's it. Finishe, move on, job done, Miller Time.

[rwtdiver]

Your initial sketch had it right: a reversable pump plumbed directly to the bottom of the ballast tank, and a vent up high in the sail. That's it. Finishe, move on, job done, Miller Time.

Thank you David,

I do have a couple of drawings to sort of confirm what you have said! (Thank you)





OK! Thank you David! I do appreciate ALL your help and expertise with my latest project.

Rob
"Firemen can stand the heat"

[He Who Shall Not Be Named]

Your gear pump will leake-by just a bit, but nothing the occasional, 'empty' command won't fix.

David

[redboat219]

[rwtdiver]

Ramel! Thank you for the information! I have a much SIMPLER method for bringing my sunken Submarines to the surface!!





Nothing complicated here! Sure fire, and works every time!!

Rob
"Firemen can stand the heat"

[rwtdiver]

I am making some headway on the Alfa hull build. I am using white Dremel PLA, and 100% infill.



Rob
"Firemen can stand the heat"