Co-Axial and Fixed Pitch Explanation
There are a lot of confusing things about RC helicopters such as co-axial or fixed.
Co-axial is when there are 2 sets of blades above eachother, both spinning in different directions.
Fixed pitch is when there is only 1 set.
I recomend to start with co-axial because it is much easier to fly since it corrects its own movement such as over correcting or wind. Please note that not all helicopters are capable of flying outside due to wind (even the smallest amount of wind.)
Co-axial is when there are 2 sets of blades above eachother, both spinning in different directions.
Fixed pitch is when there is only 1 set.
I recomend to start with co-axial because it is much easier to fly since it corrects its own movement such as over correcting or wind. Please note that not all helicopters are capable of flying outside due to wind (even the smallest amount of wind.)
Fixed Pitch
Notice only 1 layer of blades.
Co-Axial
Notice 2 layers of blades.