Building a DIY submarine

Summary by Krater

The creator demonstrates how buoyancy works using a syringe and water, then builds an RC submarine powered by syringes, motors, and batteries, before testing it in a lake and a canal.

From the video

Answers: How do you build a working RC submarine?

• buoyancy physics
• RC submarine build
• syringe water displacement
• lithium cell battery packs
• servo motors and variable resistors
• water pump propulsion

What it concludes

• Compressing a syringe increases its density, causing it to sink.
• A submarine descends by flooding ballast tanks with water to increase weight and ascends by decompressing air to push water out.
• Connecting two motors and syringes symmetrically allows fine-tuning of buoyancy to keep the submarine level.
• Routing the receiver aerial up through a shielded cable floating on a surface floater prevents signal loss underwater.