[salkudu (OP)]

Can aeroplane float in air without movement like fishes stand still in water. If yes how is it possible ..?

[neilep]

Errhmmm...not unless they are lighter than air...or have some sort of thrusty thingy coming from underneath  to propel them upwards....or ..unless they are a helicopter.....!!

Welcome to the forum Salkudu.

Men are the same as women, just inside out !

[another_someone]

A conventional aeroplane is a heaver than air machine, which means that in order to fly the wings must have a constant flow of air over them.

An airship can float like a fish.

A helicopter can hover, but it does this because the wings (which are the spinning rotors) are constantly in motion even while the body of the helicopter remains stationary.  A helicopter does not float, and the wings themselves are not stationary.

The only other case where an aeroplane can hover without air passing over the wings is when a powerful jet aircraft stands on its jet exhaust.

Ofcourse, what can happen is that an aircraft can be carried up in an updraught – in that situation, the aircraft is still falling through the air, but it can be rising relative to the ground, because the air itself is rising faster than the aircraft is falling.

George

[thayo]

welcome to the forum salkudu


lets keep trying the untried since the birth of science innovations have been like  toy but their impacts have rocked the world

[himanshu1khatri]

well i have recently been reading a lot about aviation and a certian taboo mysteries like ufo,s .......u must reseach the word...LONOcraft on google its an ion wind based craft that does levitate almost silently asif in space.......must say see the following video too for developing intregue....

i know i knw ther arnt comercial crafts yet ...but trust me most advanced military teams have fine working prototypes......jst that it aint healthy and can cause lung cancer etc.....otherwise u can do this in ur garage on a lazy bored sunday afternoon......and no u wont catch cancer in one day i rekon.....

ps: these are also called LIFETRS ...a common school project worldwide...

[daveshorts]

lifters work on a similar principle to a helecopter, they are throwing air downwards so they get pushed upwards. The way they do it is by ionising air and pusing it downwards. Ionising air uses a lot of energy so if you think that jet travel is bad for the environment any form of transport using lift from charged ions is going to be ridiculous.

The lifters people have built only weigh a few grams and are very big.

[iko]

quote:Can aeroplane float in air without movement like fishes stand still in water. If yes how is it possible ..?

 

quote:The only other case where an aeroplane can hover without air passing over the wings is when a powerful jet aircraft stands on its jet exhaust.
another_someone

Some jetplanes can float in the air like fishes in the water...actually they do not "float" but they are actively pushed up by their turbines!  They are called VTOL (Vertical Take Off and Landing) and the most famous is the British Aerospace/McDonnell Douglas HARRIER.
Enjoy its recent history at:
http://www.vectorsite.net/avav8.html
...While there have been many experiments with "vertical take off & landing (VTOL)" combat aircraft, only one has gone on to operational status in the West -- the Harrier. A British development, to which the Americans later made contributions, the Harrier has in its over 30 years of operation been one of the most interesting flying machines in the West's military arsenal. This document provides a history and description of the Harrier. ...

iko