The editor has had quite a few queries since the publication of our November issue centrespread, Qantas Boeing 707-338, VH-EAJ, regarding the different engine pylons. As there are obviously many readers who have privately asked themselves the same question we will explain it now in Newsdesk. The -300 series 707 featured turbo generators built into the pylons of three of its four P&W JT3D turbofans with the port outer (as illustrated above) being a clean design. RR Conway powered 707s did not use this arrangement nor did the original turbojet powered versions of the famous 707