Piper PA-28-181[N28907] (William T Larkins) -181 Archer1974 = Archer with upgraded avionics. -181 Archer II1976 = Tapered Warrior II wing. 180hp Lycoming O-360; span: 35'0" length: 24'0" load: 998# v: 147/119/61. -181 Archer III1995 = span: 35'6" load: 911# v: 148/x...