Thank you guys...
4,440kg per hour came from a performance table in an October 1975 edition of Flight International magazine. Gee sure glad the mag was wrong.
Chris Brady's 737 website suggests a big difference between the -7 powered 732 and the -17. I am still curious what margin there is between the -9 and -17 aircraft.
A friend at the Aviation Forum where I hang out sent me a table of engine performances for the JT8D variants which suggests the -9 is more fuel thirsty on take off than the -7 but roughly similar in cruise consumption.
Thanks Jelly Doughnut. Now all I need to do is find out all those airport abbreviations hahaha
Most appreciated...