• John Sowell, Rotary Power Setups, c. 1940s
    John Sowell, Rotary Power Setups, c. 1940s
  • John Sowell, Electric Raygun
    John Sowell, Electric Raygun
  • John Sowell, Drawing of Dragon Blazzer
    John Sowell, Drawing of Dragon Blazzer
  • John Sowell, Untitled (2 sided drawing)
    John Sowell, Untitled (2 sided drawing)
  • John Sowell, Power Wheels
    John Sowell, Power Wheels
  • John Sowell, Dragon Scout Torpedo Plane
    John Sowell, Dragon Scout Torpedo Plane
  • John Sowell, Dragon Blazzer
    John Sowell, Dragon Blazzer