Anyone ever built a Modeltech (Global) 0.46 P51? I just acquired one from a mate who had it for some time and who didn't have time to get pass joining the wing. I noticed that there's almost no dihedral on mine, unlike those that I'm more accustomed to and even the full-size Mustang. I'm starting to think that my friend may have got the wing wrong but I'm not sure as I don't have a completed Modeltech mustang to compare with. It does have a semi-sym section though with an obvious flatter bottom arc.

In any case, assuming the model was built right, with no dihedral, what should I expect when flying? No dihedral means less tendency for the plane to center itself back on its roll axis right? Also, flatter bottom means the plane shouldn't need much up elevator to keep it level in straight line and banking flight right?

You'll have to pay more attention when flying the plane, but nothing bad should happen.

With zero dihedral, the airplane will not tend to return to level flight if it gets banked due to a gust -

So its not uncommon to have zero dihedral on a P51? For a moment, I thought my friend had the dihedral brace upside down. I remember my great planes P51 having some dihedral and even that didn't survive my piloting. Well, I just have to remember to put in some opposite stick for every roll I do.

It's uncommon, but not a fatal difference.
Some racing P-51s are built with zero dihedral.

It seems to be fairly common in many imported kit and ARF scale models to ignore some surface details like correct dihedral, proper fuselage outlines, etc.

Now that u mentioned it, I seem to remember that a particular Vietnam brand has more than one of its models "sharing" the same wing shape (minus the covering of course). They prob do that to cut cost, of course at the expense of scale. Sometimes a more "beginner-friendly" wing shape is used so the model does not intimidate novices.