LOL
It indeed may seem so, hobie, but then again I find that those who have not actually flown the type(s) in question, base their opinions (?) on...well, guessing.
Take the 707 for example.
ALL primary controls are connected to the control column by the tried and true...control cables, bell cranks/rods, assisted aerodynamically by balance panels (servo tabs), and only the rudder has hydraulic power assist.
That leaves the requirement for only two hydraulic systems (utility and aux) more than enough for any failure mode.
In addition, electric back-up is provided for the trailing edge flaps...the leading edge devices being pneumatically powered.
Interconnect between the two hydraulic systems+electric hydraulic pumps+four engine driven generators, seven pneumatic air sources...well the list goes on and on.
The only item missing is an APU..and a few operators fitted even those.
Multiple (4) hydraulic systems+ADP's+electric pumps are required for the 747 because...it has NO direct physical connection between the primary control surfaces and the pilots control column
SO........like comparing apples and oranges.
Some younger folks really don't have a clue.
Why am I not then surprised at their uninformed comments?...from know-it-all backbenchers.
Last edited by 411A; 10th Nov 2004 at 00:00.