units ft enter pm create hull\hull.c ends 0 50 bot 0 top 10 out 25 / create TWR_FS\TWR_FS.S class hull ends 0 10 bot 10 top 25 in 15 out 25 / create TWR_AS\TWR_AS.S class hull ends 40 50 bot 10 top 25 in 15 out 25 / create TWR_FP\TWR_FS.P class hull shape TWR_FS.S / create TWR_AP\TWR_AS.P class hull shape TWR_AS.S ` ends 90 100 ` bot 10 ` top 20 ` in 40 ` out 50 / surface (HULL) surface (TWR_FS) surface (TWR_AS) surface (TWR_FP) surface (TWR_AP) write table.gf quit di