Hi all, As most of us are probably aware, all B747 variants from the 747-200 thru the 747-400 series could accept either of three different powerplants: Pratt & Whitney JT9D (or PW4000 on the 744 series), GE CF6 or Rolls Royce RB211, the latter apparently for Commonwealth and European customers....Jump to post
747classic wrote:Standarization of horizontal stabilizer production to -400 standard, with provisions for tail tank installation, requiring re-routing of hydraulic lines.
Two new questions regarding the 747 stabilizer tank:
1) What specific changes were made to the tail assembly to accomodate the tank?
2) On stock 747-400's operating without the stabilizer tank, is the entire tank removed, or just the outboard sections of the tank?
All the 747-400 series horizontal stabilizers are identical. Only on the 747-400,-400ER and -400M you can optionally have a part of the horizontal stabilizer sealed and used as a tail fuel tank. The added weight will be the weight of the installed sealant. Only the piping, fuel valves and the vent ...Jump to post