Rocketry Planet

LAKEWOOD, Colorado USA — The May-June issue #81 of Extreme Rocketry magazine is now available for purchase from retailers or from the Extreme Rocketry webstore. The newest issue features a wide variety of articles from advanced experimental rocketry subjects to getting started in rocketry.

Articles in issue 81 are as follows:

Feature Articles:

• Interview with Bret Simpkins
  A nuclear physicist who is passionate about designing rockets.
  
  
• Spanish Rocketry Meeting Report
  European Rocketeers hold a launch in Spain.
  
  
• Determination of Altitude from Earth Limb Imagery
  Use camera payload images to mathematically calculate altitude.
  

Regular Stuff:

• Reader Photos
• Rocket Mail
• Editor’s Comments
• Hot Products
• Extreme MRV Project Part 3: Aerodynamic Stability
• Rocket Basics: Thrust Curve and Motor Selection
• Experimental Rocketry: Iron Catalysts Part 2
• Featured Project
• Launch Calendar
• Ask the Rocket Guru

Issue 81 (May 2009) is available now at http://www.extremerocketry.com/ or at a hobby retail location carrying high power rocketry products. If your local shop does not carry Extreme Rocketry, please contact us in order to get them setup carrying the magazine.