Originally Posted by
EC-KIY
Nice and easy explanation!
I would like to add the effect of increased (or reduced if the opposite) vertical speed: high temperature on RNAV approaches (high temp, steeper approach), high elevation airports (more altitude, for the same 3º glidleslope, more groundspeed and more vertical speed as well) or some tailwind of heavy weight; in those cases runway will be coming faster to meet you.
Think about those things and plan to make minor adjustments on your flaring technique. After a few hundred landings you'll get it.
Agree with all of the above. Just to put some numbers on there, at a GS of 140kts, 1% of slope is equivalent to ~150fpm RoD. This is noticeable but is not going to have a huge effect on the quality of the landing compared with some other factors.