Taguilo From Argentina, joined Aug 2005, 74 posts, RR: 0 Posted (9 years 2 months 1 day 12 hours ago) and read 4030 times:
Does any of you recall which was the minimum duct pressure where it was possible to start the engines? In this case, did you need almost the "standard?" 2 min starter ON for the spool process, I mean, was it a low spool rate?
SlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 1, posted (9 years 2 months 1 day 11 hours ago) and read 4021 times:
Well, an old MD-80 manual I still have says minimum of 36 PSI, minus 1 PSI for every thousand feet of airport elevation.
I have started DC-9 engines at Flagstaff Arizona and at Mexico City and don't recall them taking much more time to wind up than they did at lower elevations. Maybe some, but it really doesn't stand out in my memory.
Most pneumatic systems deliver plenty of pressure and volume.
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