RoD in different flap/speed config - 737
Here is what I have had written down since line training, unfortunately I don't have them for flaps deployed-
3x alt plus 10 mile to slow down will give you your track miles needed to determine if you are on profile or not, all rough, and if your in an NG use VNAV and keep updating all your potential variables, the VNAV path indicator would then be useful, remember though, rubbish in rubbish out, and if you don't keep up to date with adjusting your variables it WILL lie to you, so all in all don't rely on it and keep using what I put above! Still with me???
320/300 kts 2500' ROD
280 kts 2200' ROD
250 kts 1700' ROD
220 kts 1100' ROD
unfortunately no flap figures for you, but if your high, 220 kts with f5 and sprees break works well,
If your close to the field and want the speed back then 180kts f10 and speed break works well too, (pax comfort is somewhat degraded though!)
If its really not happening then taking the gear is always an option, but to be honest it's better just to accept defeat and ask for some extra track miles!
ROD 5 times your ground speed gives you a rough ROD for a 3 degree glide path.
Hope this helps,
Good Luck!