I have uploaded a file ROCDRAG.ZIP to the uploads directory. It should REPLACE the existing ROCKDRAG.ZI in the Rec.models.rockets archive. The IAFA package follows: Title: ROCDRAG Version: 4 Description: Program to estimate Cd for model rockets, with altitude simulation. Author: John Kallend, METMKALLEND@MINNA.IIT.EDU (312) 567 3050 Maintained by: John Kallend Platforms: PC, (MS DOS) Copying: Freely redistributable Keywords: DRAG, MODEL, ROCKET, ALTITUDE john kallend