what is the accuracy reqd in DME arc

[aterpster]

bubbers44:

My trusty 727 did great arcs at 250 knots using heading select. I didn't know I just had to find the LNAV and VNAV buttons. Actually most of the time I rolled into about an 8 degree bank so the bank never changed.

You must have had a lot better autopilot than we had on our 727s. Heading select for us would command a 25 degree bank for any significant heading change.

Having said that anyone proficient in a 727 should be able to fly a DME arc with the autopilot and FD turned off.

[Checkboard]

Well. as we fly all DME Arc in LNAV I would expect to see the appropriate RNP for the phase of flight, normally 0.3 for approach. While raw data monitoring is normal, no one in their right mind flys a commercial jet on a DME arc in HDG SEL..why would you? As for speed, VNAV will give a sensible speed base on the next limiting waypoint,...

That's right. It should be against the law to fly with out triple IRS, FMC, LNAV & VNAV - anything else is just dangerous.

Children of the magenta line.