Ripslinger has dual propellers that rotate in the same direction. Planes with this arrangement have the props rotate in opposite directions. It obvious from the shape of the propeller tips that this is the way Ripslinger's props should rotate.
When Dusty is talking to Ishani in Nepal and he mentions her 'new propeller' as Sky Slicer Mark 5, made exclusively for the Ripslinger racing team. The propeller is a four bladed prop. None of the Ripslinger entries (Ripslinger, Ned or Zed) are using a four bladed prop. Ripslinger uses two counter rotating two bladed props. Ned and Zed each use a single two bladed prop.
In Skipper's flashback, a Jolly Wrencher sees an enemy ship and Skipper calls him Jigsaw 2 when he has a 3 painted on his side. Often an airplane's radio call sign is different from its visual identification number.