Composite-ARF Impact question

[Bill Glaze]

Adam:
This may be a little bit off the mark, but just a little bit.  During 
WW2, the Italian firm Fiat produced a very good series of fighters with 
exactly the characteristics you mention, that is, an asymmetrical 
fin/rudder airfoil.  Seemed to work well for them; other nations handled 
the problem differently.
Bill Glaze

Adam Quennoz wrote:

> Earlier this year I got to see a CA Impact up close.  It was the 
> pre-painted version.  The owner pointed out that something didn't look 
> right about the vertical stab.  I took a look at it from the nose.  It 
> seemed like it was twisted.  After a closer look from above I could 
> clearly see what looked like a non-symmetrical airfoil shape. The 
> parting line wasn't centered.  I dismissed it as a possible 
> manufacturing error because I've never heard of anyone designing a 
> vertical stab that way.  Well, I just received my Impact (white/red) 
> and it too has the non-symmetrical airfoil v. stab too.  It seems as 
> if it was designed to create lift to push the nose right as if it were 
> assisting the right thrust offset.  I'm curious if anyone out there 
> builds their pattern planes with this feature or is this unique to 
> this design?
>
> Thanks,
> Adam Q
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