With fixed rudder / fins , youd want the inboard straight & the outer offset to turn right . If you wanted safe ' outer engine ' handling .
Used flat outer , just biased a noth , airfoiled fins on the P - 38 .
Seems a wide engine spacing , to get clear air with the propwash , works good . Close motor spacing seems to have a chance of the prop slipstream
maybe causeing turbulance / interfearance drag , if the prop tips are close to the fuse. Maybe .
Smooth air & running well , most'll do round manouvers below 45 Deg. , & wingovers , on the OUTER only . But any real wind the YAW can get out of hand .
So maybe the rudders a Good Idea . Not overly long lines , initially at least , unless its calm weather .
Al, on about his Hornet , wanted the counter rotateing set up , so as not to need a moving rudder , so He said , of the ' design concept ' .
Ancient Aeromodellor Me 110 Scale Drawings , they prattled on about assymetric fin/rudder airfoils , on that . If youve one handy .