JohnSampson
RCTalk Racer
I'm trying to create a ballast tank, it is going to have a screw that will move a disk that will pull in and push out water, how will I control a motor without a new speed controller
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Ballast something maybe?It would help to know exactly what you're needing to do with it.
We don't know that. Ballast is also used to keep ships level and steady. Wooden sailing ships used rocks. Big tankers will fill with sea water rather than run empty.I'm pretty sure he wants to build something that floats then sinks them floats again
Fiber glass is VERY nasty stuff if you breathe it in...not nice.You need to make a mold. Then you need to cover it with a release agent. You'll need the woven fiberglass cloth and the 2 part resin. You'll also need a grinder and a VERY good respirator since the dust is extremely dangerous if it gets in your lungs.
There's nothing about this that's either going to be easy or cheap.