ORIGINAL: Air Screw
The comments by my flying buddy Swift427 made about as much sense as your need to use a right-handed tractor prop on one motor and a reverse pitch, left-handed pusher prop on the other motor for counter-rotating twin motors on your electric model Catalina.
AHAHAH That's funny! Really...do you think we are that stupid! ahahah at least I got a giggle!!
Nice try!