ppure,
Thanks for that, a good description of the use of VPATH, something I have been getting to grips with over the past few weeks! I have found it a useful tool in mast instances, but can overcomplicate the issue in others!
When you say about deleting the Mach no in PERF INIT, as I said, one of our aircraft then looses its ability to calculate its groundspeed in the descent when this is done and the PERF INIT is in PILOT SP/FF mode. Any idea as to why this should happen? When you put the Mach No Speed Constraint in, it does not get this fault!
I tend to do the PERF INIT in the PILOT SP/FF mode as it seems to be the only way to give the FMS the ability to see round corners and give an accurate estimate of fuel back on Tera firma at the end of a route. Has anyone found another way of doing this?
I gues most of this will make more sense when we get the fourth axis fitted, but it does not do any harm to practice in the mean time!