To fly coaxial RC helicopters small spaces is enough

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Coaxial helicopters  are single bladed helicopters and this type of helicopters can fly  within few seconds and also you can fly them in indoor  since it has single blade  you can  perform various stunts like  diving  towards one direction  and in these type of helicopter   they are  controlled based on the speed of the blade  and you can fly them in any direction it can be forward or backward  or towards left or  right .Coaxial rc  helicopters they  don’t have tail rotor  they have to  depend on single  rotor blade   and  also these  coaxial rc helicopters they come with extra features such as  led  light display. For the  experts they can fly this type of helicopters to very high speed  and this helicopter  requires some type of control  since it  comes under the category  of   electric  rc helicopters so it requires a battery  capacity  of 120 milliamps hour an they come with  5 in one control  unit  with special receiver called as  spectrum  and this receiver are  compatible  . RC helicopters are made up of different material and choose the helicopter which is not so heavy .remember before flying these helicopters there should be big space and surrounding should be free, so that the helicopter does not get crashed and damage. Usually helicopters they come with two blades and the two blades have to synchronies with each other  to lift up the helicopters  but  coaxial rc helicopter has  only one blade     And also they require  certain type of pitch  that is it can be fixed pitch or collective pitch, since helicopters  require two rotors to lift themselves through the air  this  fixed pitch  helicopter will  fly faster  because the motor will spin faster whereas collective pitch depends on the position of the helicopter that  is  depends on the angle  and it fly s according to that  direction . so better choose rc helicopters that they come with extra spare parts  and even there are wide variety of models in   electric  rc helicopters and in gas rc helicopters and in nitro rc helicopters and they all are  designed  using new technology  and  check for the blades whether the blades are working or not. collective pitch rc helicopters are  easy to fly them and slot hey fly smoothly, and they are  lot of time is required to practice them whereas fixed pitch rc helicopters    they come with  moving parts so that you can remove them   and  they break easily  but they require lot of maintenance