Off the top of my head, the O-320 engine STC on the AA-1A to increase GW to 1600#, BRS installs on C182s get a 160# increase in GW, and the myriad of Bonanza tip tant STC’s that increase GW.
Off the top of my head, the O-320 engine STC on the AA-1A to increase GW to 1600#, BRS installs on C182s get a 160# increase in GW, and the myriad of Bonanza tip tant STC’s that increase GW.