2006-06-26 01:56:37 · 7 answers · asked by Sameer Kumar 1 in Science & Mathematics ➔ Astronomy & Space
Its mostly because of aerodynamics.With the Present propulsion method we cannot device those aircraft.Primarily circular aircraft shud rely on air for lift and it cannot take off as easy as normal one used now.
Moreover Manoeverability cannot be achieved to the max with present technologies.
But who know it might be real one day..we cud have them.
2006-06-26 02:08:55 · answer #1 · answered by santhosh kumar 2 · 1⤊ 1⤋
actually the military had ordered some circular type aircraft back in the 40's but they canceled the order, these things could take off almost vertically i dont remember what they were called i just seen it on the history channel once but you can probably look it up
2006-06-26 02:03:09 · answer #2 · answered by . 4 · 0⤊ 0⤋
Because they are extremely difficult to keep stabalized in flight. The governments of the world have been trying to overcome stabilizer problems for almost 50 years now. They tend to spin around and wobble horibbly in flight. To keep them stable currently uses much to much fuel to be practical.
2006-06-26 02:01:40 · answer #3 · answered by zharantan 5 · 0⤊ 0⤋
turbulance is the main problem....and u need a more aerodynamic structure, which a tubular surface never is(at high speeds).
2006-06-26 02:06:42 · answer #4 · answered by pHatman 3 · 0⤊ 0⤋
Because Aircraft designers are stupid
2006-06-26 02:00:30 · answer #5 · answered by gcaisle 2 · 0⤊ 0⤋
very hard to keep stable in flight.
2006-06-26 01:59:52 · answer #6 · answered by Alex F 3 · 0⤊ 0⤋
becouse we're not litlle green man :D
2006-06-26 02:02:16 · answer #7 · answered by bagpip3r 2 · 0⤊ 0⤋