I know this project is probably dead and gone for years now, but I have been delving around here, mining for gold.
For the Russians, rather than a difficult Romanov eagle, you could do a white saltire on light blue background - their naval ensign, I believe.
For Germans, a tricolour of red, white, and black.
I have a pair of these ornithopters sitting about collecting dust, though I think mine are a different scale.
What would any of you suggest for a
French 
pilot on one of these? I don't want to go pith helmet - too iconically British or German to me.