This has all been great stuff guys - fascinating. Particularly interested to hear the history, since it's now clear that speed is the key - originally designed for slow climbers which also by definition had small turn radii, but now with jets, you may get the height but you have to watch that speed until you get there.
Now I have one more question for you. What if the "obstacle" for the 30 departures out of Hobart wasn't a 938ft hill to the right of the straight-ahead track, but a weapons range with a danger area from surface to 4000 feet which crosses the straight-ahead climbout at 1.3nm from the DER and requires a max 1600m radius turn starting over the DER to clear its boundary on a right turnout? In other words (a) straight ahead isn't an option and (b) no amount of height gain will give you clearance.
NS