Rocketry Planet

Rogers Aeroscience is pleased to announce the addition of RASAero comparisons with in-flight measured subsonic, transonic, and supersonic drag coefficient (CD) data to the RASAero web site. Comparison of the RASAero predicted power-off CD and in-flight measured power-off CD for two of the Adrian Adamson Violent Agreement rockets have been added to the site.

Adrian Adamson's Violent Agreement SS Sustainer rocket obtained good agreement between the RASAero predicted power-off CD and the in-flight measured power-off CD for mid-to-high subsonic Mach numbers, transonic Mach numbers, and supersonic Mach numbers up to Mach 2.4.

The rockets were flown with Featherweight Altimeters Raven altimeters, with the rocket CD's measured during the coast phase of flight based on the on-board measured axial acceleration and the burnout mass of the rocket. For the Violent Agreement SS Sustainer rocket good agreement was obtained between the RASAero predicted power-off CD and the in-flight measured power-off CD for mid-to-high subsonic Mach numbers, transonic Mach numbers, and supersonic Mach numbers up to Mach 2.4.

The RASAero comparisons with in-flight measured subsonic, transonic, and supersonic CD data can be found on the RASAero web site on the Comparisons with Flight Data page. Special thanks to Adrian Adamson from Featherweight Electronics for providing the flight data and the rocket data for the Violent Agreement rockets.

The RASAero authors are always looking for flight data to compare our altitude predictions and drag coefficient predictions against to help further improve the accuracy of our flight simulations. Flight data from rockets flown with barometric altimeters, GPS altimeters, and accelerometers, in-flight measured drag coefficient data based on measured on-board axial acceleration; are all being actively sought by the RASAero authors. Note that it is important for the accuracy of the flight data that the rocket have been weighed prior to launch for an accurate liftoff weight. The flight data and rocket information can be sent to the e-mail address below.

Additional information on the RASAero software can be found on the RASAero web site at www.rasaero.com.  The RASAero authors, Charles E. (Chuck) Rogers and David (Coop) Cooper can be contacted at This email address is being protected from spam bots, you need Javascript enabled to view it .

Chuck Rogers
Rogers Aeroscience