This plane has a split axle doesn't? From what I know they straighten out when they are not loaded with the plane's weight. Isn't that correct?
In your case, with a model, that would need to be animated if it's for movies, or at least separate parts if it will be static.
Check this video, you can't see the movement clearly but you can see the attitude of the wheels is different on the ground and in the air.
And a war time video. Again, you can't really see the movement but you can see the difference on the ground and in the air-
Nice work BTW!