Originally Posted by
Musket90
I remember the Panam and TWA Heathrow-Lax flights in the early 70's, 'Clipper 121' and 'TWA761'. Their rate of climb was such that they hadn't reached cruising level, normally FL280 or 310, by the time they had entered Scottish airspace.
Were these with the JT9D-3A's?
Also, out of curiosity, with those early model JT9D's that had the 'wet' option for take-off, what reduction in take-off length did that mean? Was it used every time on those international flights since they were so heavy or only under certain conditions? ie.max weight, high OAT etc etc?