Originally Posted by
pineteam
I can only talk for the IAE versus NEOs ( PW1000G) .The NEO definitely descent faster and float less during the flare after setting idle thrust. Also a quick comparison in the QRH shows the distance required for descent is less for the NEO versus the CEOs ( IAE engines).
I wonder if it is more due to the huge engines ("ice cream scoops") on the wing acting as additional drag, compared to the other engines. Instead of idle factor