IF UFO's are real what type of propulsion systems would they have?
370984
UFO's are real.\nBy definition any flying object that is not immediately (and/or within a realistic time frame) identified is an Unidentified Flying Object.\n\nIt does not follow, however, that all (or any) UFO's are of extraterrestrial origin.\n\nYour question is perhaps focusing on flying saucers?\n\nThe idea of magnetics and dynamos and gyroscopic systems as a form of stable propulsion for flying saucers has long been debated.\nI remember reading a an article many years ago about a RAAF \n(Australian Air Force) engineer who was working on this but I cannot remember his name and apparently he 'disappeared' shortly after making some of his claims public. This was maybe 25 years ago or more.\n\nAs the dentist said: The tooth is out. There.
365870
An interesting question.  I would say that spacecraft and/or rockets would be the most costly.
137427
satellites.\n\nfor sure
79142
I strongly doubt it.  The government is probably doing aeronautics testing that is either highly classified, unethical (i.e. nuclear powered or something), or both in that area.  They don't feed the myth of aliens, but they probably like people thinking that the secrecy is all about aliens as opposed to what they might actually be doing.
840197
No aliens, no UFO, unless you consider top secret aircraft *designed* by human beings of this planet -- which are flown only at night so they will not be identified -- as UFO.\n\nIf aliens from outer space had come to Earth, they would have had the technology to not be captured in the first place; and they could have gathered all the info they would have needed from orbit anyway.\n\nArea 51 is secret because there are captured airplane from other countries in there; and the US government does not want anyone -- especial the foreign governments -- to know what they know about them.\n\nBut flying saucers?  No way.
60817
UFO is something special...it could be a myth or a phenomena...but i belive it is a real thing...
247401
Fact 1 - UFOs have been recorded through the history of mankind, paintings on cave walls..drawings..carvings.. paintings on canvas, they have been photographed, recorded on video and digitally captured. \nFact 2 - Ther are thousands and thousands of wittnesses to these crafts that have increadible speed and can manouver in a way we could only hope to achive.\n\nFact 3 - There are governments that are comming clean and revealing the once classified information on UFOs. (Russia, Mexico, Brazil..hopefully Canada soon) Why would they be classified if they were not real?\n\nFact 4 - There are many documented cases involving commercial airliners and military aircraft as well, that have had encounters and even chased these crafts on numerous occasions. \n\nFact 5 - I have been a wittness on many occasions in my lifetime so far...I have seen many different objects and crafts..They are real..I can say I know..and I would stake my life it!! that is how positiive I am.
1079379
UFOs do exist but alien abductions are bogus. I could tell you why. I could tell you lots of things, but you wouldn't believe me anyway.
1146635
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.\nMoreover Manoeverability cannot be achieved to the max with present technologies.\nBut who know it might be real one day..we cud have them.
1032480
Of course UFOs are real anything that is flying/hovering and you dont know what it is is a UFO.\n\nAlien spacecraft on the other hand or obviously real. You cant possibly think that in all the BILLIONS of stars in our galaxy and all the TRILLIONS of galaxies in our universe that there isnt other form of life out there that we dont understand yet and that could possibly be visiting our planet.\n\nHave you read about Betty and Barney Hill's abduction. After they were abducted Betty went under hypnotic regression and drew a star map from wht she remembered seeing on the alien spacecraft. A few years later independant researchers compared the drawing with maps of know stars. And the found a match. Interesingly enough our Sun was one of the stars on that chart and all of the other stars on the map were stars similar to our own sun. And if you arent familiar with astronomy stars like our sun make up only a very small portion of the possible size and colors of stars in our galaxy.
399405
They probably come standard that way.  \nOr perhaps there's plans to build roads or airports nearby.\nMaybe so if they fall in the water, they float? And then you won't get electrocuted.\nOr maybe it's a secret code for UFOs.
595925
Spacecraft propulsion is used to change the velocity of spacecraft and artificial satellites, or in short, to provide delta-v. There are many different methods. Each method has drawbacks and advantages, and spacecraft propulsion is an active area of research. Most spacecraft today are propelled by heating the reaction mass and allowing it to flow out the back of the vehicle. This sort of engine is called a rocket engine.\n\nAll current spacecraft use chemical rocket (bipropellant or solid-fuel) for launch, though some (such as the Pegasus rocket and SpaceShipOne) have used air-breathing engines on their first stage. Most satellites have simple reliable chemical rockets (often monopropellant rockets) or resistojet rockets to keep their station, although some use momentum wheels for attitude control. Newer geo-orbiting spacecraft are starting to use electric propulsion for north-south stationkeeping. Interplanetary vehicles mostly use chemical rockets as well, although a few have experimentally used ion thrusters with some success (a form of electric propulsion).
550076
better question is...If UFO's could make it here to earth, Why would they? we would be like the kids that ride the short yellow bus compared to them.
36493
Extra-Terrestrials\nALIENS
472738
they could come from other star systems and yes they would have the technology to travel to our world. the universe is estimated to be around 12 billion years old.\n\nhow long have we been on this planet?\nwhat was our technology like 200 years ago?\n...no electricity, cars or planes etc.\nlook how far our technology has advanced in 200 years...\n\ncan you imaging what technology the aliens would have if their world started a million or billion years before ours?
931991
I don't know much about the crop circles, but as for flying saucers, yes they probably would use aliens as a means to hide new technology.  That is how they kept the secret of F-117 a secret for as long as they did.  People suspected, but couldn't get any proof.  They didn't keep the B-2 a secret because stealth technology was known, so no reason to keep it a secret.
416799
UFOs, if they exist, probably are not constrained to the laws of gravity like us, they probably have mechanisms that allow them to exist in another dimension and partially phase into our dimensions for scientific study. They probably rarely are seen and or land on land in our universe, as the gravity is probably to powerful or too weak for their bodies. The fact that they are ever seen means they are probably interested in how we interpret seeing them. all for scientific research.