Good day,
ill be starting my 737 Type Rating very soon and have a couple of questions which came up during reading and trying it out at PMDGs.
1. Changing FMC descend speed—leading to change of the T/D point:
I thought that with increasing the Descend speed from eg 280 to 350 I would have my T/D point starting later since I lvl be having a higher ROD. But trying it out the FMC T/D started even earlier. Does the extra mileage needed for reducing speed effect the T/D more the higher ROD?
2. Visual Approach: FMC distance versus DME
typing in the visual approach as backup I start the turn to base around 6 nm to go...3 for base,3 for final for 1500ft AGL...read a book now which used the rule of thumb of starting it at the ratio of 1.5:1 (AFE/Miles) ...meaning that being at 1500 after this rule I start turning base at around 2.25nm, not at 6 as before..
does this shorter distance maybe refer to DME distance and does not include the the mileage needed for the turn..?
thank you!