You would have to ask them, as I am in no way associated with them. While your at it, maybe contact Top Flite and ask them same question, regarding thier .60 size Corsair.
Possibly it is because for some reason: 1/8 scale pilots are hard to find.

It would seem that many times, some of us well informed modelers know more facts about their models than the manufacturers and distibutors do.

If there are any doubts, do the math.