What if we use a submarine for space travel ? Description: On FlipTheWhy, we explore the world’s biggest “what if” scenarios and reveal the hidden logic behind them, and in this video — What if we use a submarine for space travel? — we dive into whether a submarine could survive outside Earth’s atmosphere, how its hull behaves in a vacuum, why ballast tanks and propellers fail in space, how heat buildup turns the vessel into an oven, why radiation overwhelms the crew, and how communication and life support break down as the submarine becomes a drifting tomb. This scientific and entertaining breakdown examines every critical flaw of using a submarine for space travel and uncovers what really happens when deep-sea engineering meets the harsh reality of outer space. Timecodes : 00:00 – What happens when a submarine goes to space? 00:12 – Why submarines and space seem similar at first 00:28 – Pressure: the biggest misunderstanding 00:45 – How submarines survive the deep ocean 01:02 – What happens to the hull in a vacuum 01:20 – The “exploding outward” problem 01:38 – Ballast tanks become useless in space 01:55 – Why propellers don’t work without water 02:10 – The submarine becomes a drifting metal capsule 02:25 – What if we strapped rockets to the hull? 02:40 – Heat regulation failure in space 02:55 – How the submarine turns into a giant oven 03:12 – The cosmic radiation problem 03:28 – Why submarine hulls offer almost no radiation protection 03:45 – Sonar vs space: total communication failure 04:00 – Why radio signals barely work inside a submarine 04:15 – Life support limits: oxygen, CO₂, and time 04:32 – The final hours inside a submarine in space 04:50 – The drifting tomb scenario 05:05 – Could a submarine ever become a spaceship? 05:22 – Final conclusion: the idea works… for about 30 seconds 05:32 – End