Hybrid Air Vehicles Prototype Airship in Flight
"This is the HAV prototype Hybrid Airship. That means it's slightly heavier than air and it uses lift generated by forward motion to keep it in the air. This makes it much easier to handle when it's on the ground. The Lockheed P-791 is similar to this in concept but appears to not be so well designed aerodynamically."
Article:
The new vehicle set to revolutionise the skies
A serious balloon
Lighter than Air
AIR SWIMMING
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