In all shots of Skipper's tail from the side, the primary color pattern is red and white squares except when the tail is chewed up in the desert/canyon sequence. The color pattern here is entirely black or dark gray and white. In New York, the primary pattern is again red and white.
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.