Nazgul At Pelennor

[Amarie of the Vanyar]

Eurytus, you are right, that Nazgûl was not send to Isengard because of Pippin. I made a mistake [img]smilies/frown.gif[/img]

But look at Gandalf's words [img]smilies/wink.gif[/img]:

'It is two hundred leagues or more in straight flight from Baraddûr to Orthanc, and even a Nazgûl would take a few hours to fly between them.'
The Palantir; The Two Towers

A league is about 3 miles, that means that a winged Nazgûl can cover 600 miles o more in a few hours. In my opinion, the expression 'A few hours' cannot mean more than 6 hours. So, the minimum speed for the Nazgûl would be of 100 miles per hour (600 miles or more in 6 hours or less).

Again, that is a very high speed, which would allow a Nazgûl to fly from Dol Guldur to the Morannon in less than 4 hours. Plenty of time for participating in the attacks to Lorien and getting to the Morannon on time. [img]smilies/wink.gif[/img]

(In the same chapter it is also said that winged Nazgûl can fly at a speed grater than any wind of Middle-Earth. That reinforces my opinion that they could fly faster than 100 miles per hour. [img]smilies/eek.gif[/img] )