Q&A for How to Build a Blimp

Check your local and state laws regarding aerospace vehicles and FAA and EAA for blueprints and advice. Draw up a plan and purchase the required materials and tools, helium cylinders for balloons or propane, or get a furnace lightweight enough to take on board to provide lift. Check your parachute and take off.

You can, but it won't fly. The helium is less dense than air in a room, causing the blimp to rise when helium is added. If you use normal air from the room the blimp will inflate, but it will not rise.

A blimp is a safer, slower version of a plane. If a motor fails, the blimp fill not crash land. But since blimps use helium, they are very expensive.

The maximum height a blimp can fly is usually about 4,000 feet above sea level. That is why blimp bases are located near sea level.