DOA Neptune SB1 Tiger Thunder Seawolf - need some help

[tifosi12]

That I really dont know, Any brush motor ESC for the main prop will work as long ar it can do 100% forward and 100% reverse. I mostly upgrade to 500kv brushless motors if i need to replace a ESC or motor on a Neptune.

I was more worried about the amps and voltage the ESC delivers so as not to burn up the motor.

[Sinksalot]

Great info, many thanks.

If I wanted to replace the Neptune's ESC with a smaller unit, any recommendations?

That I really dont know, Any brush motor ESC for the main prop will work as long ar it can do 100% forward and 100% reverse. I mostly upgrade to 500kv brushless motors if i need to replace a ESC or motor on a Neptune.

[TuptubBuilder]

Thanks, well not doing that great since I'm having trouble fitting everything back into the tube.

Your pictures look great. The great night shot makes me rethink my ideas for customization. Maybe all those windows are ok if you put in some illumination. I'm thinking LED chain. Hmm.

Submit a photo of your pump install, maybe I can help.

[tifosi12]

Here are two of the replacement pumps setups i have used in the Neptune. Got the all the stuff off Amazon. Also you don't need to get this pump, a smaller pump will do. It will just take longer to dive and surface.

Intillab 12V DC DIY Peristaltic Liquid Pump:


Keenso 12v Windshield Washer Pump and 2 Way Normally Closed DC 12V Electric Solenoid Air Valve 1/4" NP:



Also if the Pump controller is bad and I am using 75mhz, or for people in Europe 40mhz. I use a Brush motor speed controller to control the pump with one of Bobs BLM - Battery Link Monitors connected to the receiver and pump, so if I lose signal it take control of the pump ESC and blows the ballast out bringing the sub to the Surface. You just need make sure when diving to stop the pump once you get the the point where the Neptune can dive using the dive planes. Its not a big deal

Other people have used this stuff too.

Great info, many thanks.

If I wanted to replace the Neptune's ESC with a smaller unit, any recommendations?

[Sinksalot]

Here are two of the replacement pumps setups i have used in the Neptune. Got the all the stuff off Amazon. Also you don't need to get this pump, a smaller pump will do. It will just take longer to dive and surface.

Intillab 12V DC DIY Peristaltic Liquid Pump:


Keenso 12v Windshield Washer Pump and 2 Way Normally Closed DC 12V Electric Solenoid Air Valve 1/4" NP:



Also if the Pump controller is bad and I am using 75mhz, or for people in Europe 40mhz. I use a Brush motor speed controller to control the pump with one of Bobs BLM - Battery Link Monitors connected to the receiver and pump, so if I lose signal it take control of the pump ESC and blows the ballast out bringing the sub to the Surface. You just need make sure when diving to stop the pump once you get the the point where the Neptune can dive using the dive planes. Its not a big deal

Other people have used this stuff too.

[tifosi12]

The easiest control is an ESC. However, you need a cut-off switch with parallel diode for fill mode so that the bladder is not over pressurized.
If you would indulge me two suggestions: Get Bob Martin's book on RC Subs and read it cover to cover and be aware of "scope creep", it's a project killer.

ESC, didn't think of that but yeah, that might do it.

I have the book and read it. Well aware of scope creep (I'm a project manager by profession). OTOH there is that old symptom I know from working on cars: "While you're in there you might as well...."

[tifosi12]

You look to being doing great with your Neptune. The main things that die on a Neptune are the Ballast pump controller and the pressure sensor that connects to it. I fixed six Neptune that I bought. Four said they didn't work and the other two were suppose to be working. But none worked. I was lucky I have found two new original pump controllers and sensors. I also upgraded the small prop, as its tiny, with a new a 62mm prop from the thunder tiger Seawolf parts. As for finding replacement electronic thunder tiger sub parts, they are dam hard to find.

Here is my own person Neptune sub. Yes I know it looks like a Seawolf, but I gutted this Neptune and replaced the parts with Seawolf parts and added the bigger prop with a brushless motor, Lipo battery.

Thanks, well not doing that great since I'm having trouble fitting everything back into the tube.

Your pictures look great. The great night shot makes me rethink my ideas for customization. Maybe all those windows are ok if you put in some illumination. I'm thinking LED chain. Hmm.

[TuptubBuilder]

Working on the sub. Meanwhile I managed to replace the prop and redid the electrical connections and the air lines. Still have to do the assembly of it all, which will be tight. But at least in a disassembled testrun all the functions were ok and the bag inflating/deflating.

This made me think: I really love the simplicity of the inflating bag, filling it with water for diving/surfacing. Does anybody know of the electronic part required to control the pump? I assume it plugs into the receiver on one end and on the power supply line for the pump on the other. Probably some kind of relay. I'd love to use that for my next self made boat as a means to control the dive/surfacing.

The easiest control is an ESC. However, you need a cut-off switch with parallel diode for fill mode so that the bladder is not over pressurized.
If you would indulge me two suggestions: Get Bob Martin's book on RC Subs and read it cover to cover and be aware of "scope creep", it's a project killer.

[Sinksalot]

Working on the sub. Meanwhile I managed to replace the prop and redid the electrical connections and the air lines. Still have to do the assembly of it all, which will be tight. But at least in a disassembled testrun all the functions were ok and the bag inflating/deflating.

This made me think: I really love the simplicity of the inflating bag, filling it with water for diving/surfacing. Does anybody know of the electronic part required to control the pump? I assume it plugs into the receiver on one end and on the power supply line for the pump on the other. Probably some kind of relay. I'd love to use that for my next self made boat as a means to control the dive/surfacing.

You look to being doing great with your Neptune. The main things that die on a Neptune are the Ballast pump controller and the pressure sensor that connects to it. I fixed six Neptune that I bought. Four said they didn't work and the other two were suppose to be working. But none worked. I was lucky I have found two new original pump controllers and sensors. I also upgraded the small prop, as its tiny, with a new a 62mm prop from the thunder tiger Seawolf parts. As for finding replacement electronic thunder tiger sub parts, they are dam hard to find.

Here is my own person Neptune sub. Yes I know it looks like a Seawolf, but I gutted this Neptune and replaced the parts with Seawolf parts and added the bigger prop with a brushless motor, Lipo battery.



Here is one I rebuild for someone. One picture is the sub as it was getting dark and the other is the Neptune 10 feet at the bottom of pool holding station. Running at 75mhz

[tifosi12]

Working on the sub. Meanwhile I managed to replace the prop and redid the electrical connections and the air lines. Still have to do the assembly of it all, which will be tight. But at least in a disassembled testrun all the functions were ok and the bag inflating/deflating.

This made me think: I really love the simplicity of the inflating bag, filling it with water for diving/surfacing. Does anybody know of the electronic part required to control the pump? I assume it plugs into the receiver on one end and on the power supply line for the pump on the other. Probably some kind of relay. I'd love to use that for my next self made boat as a means to control the dive/surfacing.

[TuptubBuilder]

Yes.

English is my second language so I often struggle finding the right word for stuff like that. Which makes searching for it on amazon equally difficult.

That said I noticed on the Amazon page you linked there are a bunch of the connectors and Y linkages listed when scrolling down.

Your English is excellent. I just didn't know if you were asking a question or making a statement. I think you have sufficient information to successfully install the pump. The next issue is the stern port. Try to sort that out yourself. If you get stuck, you can always revive this post.

[tifosi12]

What are you talking about? Slip the tube on and forget it.

I might just do that. Thanks.

[tifosi12]

What do you mean by connectors and tie downs? Do you mean wire ties to secure the tubing?

Yes.

English is my second language so I often struggle finding the right word for stuff like that. Which makes searching for it on amazon equally difficult.

That said I noticed on the Amazon page you linked there are a bunch of the connectors and Y linkages listed when scrolling down.

[Das Boot]

Thanks for the link. Finding the tubing seems easy on Amazon. But I'm having a hard time finding the connectors and the tie downs or whatever one uses to make them stick.

What are you talking about? Slip the tube on and forget it.

[TuptubBuilder]

Thanks for the link. Finding the tubing seems easy on Amazon. But I'm having a hard time finding the connectors and the tie downs or whatever one uses to make them stick.

What do you mean by connectors and tie downs? Do you mean wire ties to secure the tubing?