Back to
Air Command Rockets


Find Data

Pressure Chambers




Test Procedures

Test Equipment



psi to bar

mm to inches

feet to meters

grams to ounces

Request Experiment

Current Requests

Submit Experimental Data



About Labs

Static Thrust Measurement Procedure


This procedure is used for testing the the static thrust produced by a water rocket. Accurately measuring the thrust curve can be used for evaluating the effectiveness of various modifications made to the rocket.


Due to the high pressures involved perform this experiment behind a safety barrier.



  1. Setup the test stand according to the test stand's specifications.
  2. Calibrate the test stand to cover the desired thrust range.
  3. Fill the rocket with water.
  4. Attach air supply to the rocket via the remotely activated release head.
  5. Attach the rocket to the test stand.
  6. Pressurise the rocket to the desired pressure.
  7. Start recording / logging software
  8. Start cameras
  9. Launch.
  10. Suspend calibration weight from nozzle, and wait a few seconds.
  11. Stop cameras
  12. Stop recording software.
  13. Save captured data and optionally perform further analysis in other applications.


  1. It is useful to video tape each test firing, as the video can give clues to events seen in the thrust curve.
  2. Inspect the data after each firing to make sure good data was recorded and that the thrust did not exceed the dynamic range of the test stand. Ie. that the data is not clipped.
  3. Perform multiple firings of the same rocket modifications so that an average can be taken.

Copyright 2006-2010 Air Command Water Rockets

Total page hits since 1 Aug 2006: