Plane & Helicopter Sprites

[Hoeloe]

The problem you have is that your change in design to the landing gear has made it functionally useless. If a helicopter had that sort of landing gear and tried to land, it would roll backwards. Notice how every set of landing gear in those images has a small, straight "tail" coming off the back? That stabilises the helicopter and stops it from rocking. Because yours curves upwards, you end up with something like a wheel, which will roll backwards due to the weight of the tail.

While it's fine to bring your own ideas and design into things, it helps to pay attention to how things actually work, and what they're for, particularly when gravity and balance are involved.