Fuel for Thought
                                                                                                             Test # 2
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                                                                      38mm Fuel for Thought 2-17-07
                                                                                                   More Test Data
                            
This is my third test of this fuel in a 38mm motor. Test results from static test #2 indicated a better than "my" average ISP of 142.7.  I  liked  the numbers, but they seem way out of bounds, so another test was conducted to prove, or disprove the first test results.

Attempt #3 was at a KN of 313. Exactly the same as the previous test. I also used the new ignition method on this motor. I cast a 3/8" slug of 65% KNO3 - 35% Dextrose - 1% RIO fuel at the top of the forward grain. The motor came up to pressure 1.5 seconds after the igniter fired. It was not as fast as the last static test, but better than normal for the fuel.

                             The data from this firing was as follows

   128.9 gram of fuel fired in .75 seconds. There were 171.88 Newtons of total thrust, and 214.83 Newtons of average thrust. As usual my test stand  was calibrated before firing. The ISP for this test was 135.98.

It looks like from a performance stand point this fuel is a winner. It has some casting characteristics that will make it undesirable for some people, but I am willing to except them. Storage safety is still being evaluated and is of some concern. My next step with this formula is to try and dial in a better flame color and dim the brightness down a bit. Over all I am pleased.

38mm x 112mm static test 2-17-07