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On Sunday, high-school seniors Sanzio Angeli, of Clover Hill High School, and Dylan Whitesel, of Midlothian High School succeeded in breaking the world's record by launching almost 4000 model rockets at one time. In the process, they collected $20,000 to support the Susan G. Komen Foundation.

For more information, and videos, please see Rocket4TheCure – New World’s Record As Teens Launch Almost 4000 Rockets at Once

Tools >>

Descent Rate Calculator

This tool estimates the descent rate for your rocket rocket as it falls to the ground under its parachute. This calculator is based on the original EMRR calculator by Jordan Hiller.

Enter the weight of your rocket (don't forget to include the weight of the expended motor). Then enter the diameter (or maximum width) and choose the approximate shape of the parachute. Optionally, enter the altitude at which you expect the parachute to deploy.

Rocket Weight
Parachute Diameter
Parachute Shape
Altitude (optional)

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