WORLD WIDE WEB — RocketEngineer.org is pleased to announce its latest software, Flight Dynamics 4.0. This new version has many new features, a more accurate set of codes as well as new capabilities.

Owner Dave Ketchledge stated, "In the late 1980's high power rocketry ventured into a new technology, active guidance. It was experimental but could lead to a 15% increase in altitude in certain designs. In August of 1993 I coined the phase VTS (Vertical Trajectory Systems)." The term VTS was first used in Dave Ketchledge's article titled, "Active Guidance and Dynamic Flight Mechanics for Model Rockets" High Power Rocketry (Aug 1993) and also used in the Flight Dynamics software.

The Flight Dynamics 4.0 Included dozens of new features including: 

• Select any of 17 motor curves from a common Excel thrust vs. time curves
• Compensation for changes in air density due to altitude
• A 3-D graphics plot for trajectory analysis
• Able to fly both unguided and VTS vehicles
• Operates in both the subsonic and supersonic regions of flight
• Three types of sensors, Sun Seekers, Rate gyro's and Free gyro's
• Control via guidance fins, motor gimbal or cold gas CO2 reaction thrusters
• 32 variables are charted on 4 chart recorder displays
• Storage of initial design data for reuse
• Fight Dynamics 4 provides storage of flight data for additional study and use
• Each CD comes with a 45 page users manual with complete theoretical background
• Documentation on control system tuning and its impact to the trajectory
• Additional documentation includes mil-spec report on staticly stabilized vehicles and Centuri Engineering TIR-33 by Jim Barrowman

Each CD includes a complete simulation tool and a library of documentation and sell for $35 a copy (documentation manuals are free upon email request). Orders are currently being accepted at http://www.rocketengineer.bravehost.com.