It's not bad, and it could be a lot better if you tweak it a bit. Get a reference pic of a helicopter and tweak the top half of the model. The front is too flat, and the wrong angle. The windows are an odd shape and in the wrong place. With a reference picture, you could line those things up in about ten minutes and it'll look a lot better.
As Puki said, the texture is tiled too many times. It seems to be tiled about twenty times down the length of the vehicle. Unwrap it properly so that it only tiles once down the whole length and again, that'll make a huge improvement.
You'll be surprised how much difference that little bit of extra effort will make to the final result.
Looking at it, I'm pretty sure you made it without using a reference, and considering that, I think it's good work. I couldn't make something that good with no reference. But using references is the key to making those professional quality models.
As Puki said, the texture is tiled too many times. It seems to be tiled about twenty times down the length of the vehicle. Unwrap it properly so that it only tiles once down the whole length and again, that'll make a huge improvement.
You'll be surprised how much difference that little bit of extra effort will make to the final result.
Looking at it, I'm pretty sure you made it without using a reference, and considering that, I think it's good work. I couldn't make something that good with no reference. But using references is the key to making those professional quality models.