Comments by "David Elliott" (@davidelliott5843) on "H I Sutton" channel.

  1. The ultralight aircraft drones are wonderful but build time is enormous. They could be thrown together faster than a human rated aircraft but build time is still big. Something using PS foam wing cores covered with shrink to fit plastic wrap could be very cheap and fast to build. Put a stick down the length and it should be stiff enough. Basically an upscale model aircraft.
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  2. Titanium is good at high temperatures but size for size steel is stronger. Weight for weight Titanium is stronger - good for aircraft but not important for ships. Non-magnetic is however a big benefit in submarines.
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