I Class Rocket Motor Static Test

This is our first I class motor test. The motor is made out of 1.25" SCH40 PVC. The nozzle is made from dry-lock hydrolic cement with steel washer embedded in the center. The nozzle diameter is 7/16" with a convergence cone of approx. 45 degrees and a divergence cone of 15 degrees. The rocket fuel is kno3/sugar cast in to three 3" grains with a core of 5/8". The average thrust is 480n or 108lb. Total burn time for this motor is only .68 seconds.

The motor was a partial success, this was meant to test the design of the motor to verify it did not explode due to pressure. If you watch closely you can see a puff of black towards the end of the burn, this is burnt sugar being shot out of the nozzle. The rocket fuel was made with to much sugar and therefor did not burn completely. The next motor will be constructed with Sorbitol which should increase the burn time to 1.5s as well as lower pressure.

Category:

Science & Technology

Tags:

• rocket
• class
• motor
• test
• pvc
• sugar
• candy
• drylock
• nozzle
• fuel
• amature
• rocketry
• amateur
• experimental

[MegaZombiekiller55]

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[nattsurfaren]

The rocket engine that says pfff