Why is it possible to describe an airship as a lighter-than-air craft though the materials used to make airships are heavier than air?
5 answers
When you conider the total volume of the aircraft, the weight within that volume is less than the same volume filled with air. It is the average density that determines whether it will float or not.
I don't get it still, can u explain further?
Why is the weight within the volume of the aircraft less than the same volume filled with air?
Thanks in advance
Why is the weight within the volume of the aircraft less than the same volume filled with air?
Thanks in advance
"Airship" is this case something like a blimp.
The weight within the airship is filled with helium, which has only 4/29 the density of air. That is why the airship is "lighter than air" when you average over the entire volume.
Hot air balloons work because the hotter air inside is lighter than the air outside.
The buoyancy force on an airship depends upon the density of the air OUTSIDE.
The weight within the airship is filled with helium, which has only 4/29 the density of air. That is why the airship is "lighter than air" when you average over the entire volume.
Hot air balloons work because the hotter air inside is lighter than the air outside.
The buoyancy force on an airship depends upon the density of the air OUTSIDE.
Did u mean that the airship can float because the density of the airship is lower than the density outside?
yes.
2 answers