I have to agree with rolling circle on this one. The difference as r.c. has said before is that a stationary prop is subject only to form drag. A windmilling prop is subject to both form drag and 'windmilling' drag.
It is a fact of life that a windmilling prop produces more drag than a stationary (fixed pitch) prop. We proved this conclusively at ETPS years ago.
[This message has been edited by watford (edited 19 July 1999).]