1: Air hog helicopter.
2: Good light
3: A sharp exacto knife.
4: Rotary tool.
I first held mine up to a bright light to get an idea of where things were situated inside one of these things. The silhouette revealed where the electronics package was and then I got started.
Take your knife and cut away the front portion of the windows. This will reveal the inner works. That little silver square is the battery. STAY AWAY FROM IT! This is a LiPo type that, if punctured, will catch fire!
Step 1: A Look Inside.
Step 2: Skeletonizing.
Then start in with your rotary tool. I cut away a good part of the back end and a little off the top as well. Any extra plastic decorations that may be attached can go too.
Step 3: Did He Really Say Torch?
To remove these rough edges and harden the foam, take a tourch lighter and brush it by the rough edges.