FWIW I believe Qantas had a RNP departure down the valley for the 737. Ran a trial for a while, but no longer in use due to noise abatement. Noise abatement is also what prohibits a visual departure down the valley.
Unlikely to be a OEI weight advantage, as the immediate 15 deg aob turn isn't really weight limiting.
Last edited by *Lancer*; 4th Sep 2016 at 01:13.