The stainless tube is turning out to be a huge pain to work with. I was tempted to ditch it and use teflon stainless braided hose instead but I don't think the ends would have fit in the small space bellow the bottom of the solenoid. It took me about 10 attempts to make one stainless line. Now that I have one right it is much easier to make more.
One issue I have run into is how to assemble the motor and plumbing considering that nothing can rotate freely once tightened. I am hoping that once I tighten the compression fittings I will be able to take the fitting apart to work on the engine.
We also need to test the final configuration of the thruster. Previous versions didn't have anti-chaneling rings as the catalyst fit tight and we went running them for long periods of time so it will be interesting to see if they make any difference initially. I am also adding a metering jet which should hopefully smooth out some if the pressure oscillations in the chamber. I was thinking of testing today but Buren couldn't make it.
I decided to include a pressure transducer on the vehicle as it doesn't add much weight and knowing the tank pressure will be useful when pressurising remotely and also when flying as you can get a fairly good estimate of how much propellant is left from knowing the initial pressure, volume and current pressure.
Today was the day I said I wanted to have a strap down test done by. I am a bit disappointed we haven't got that far but looking back it was not a particularly realistic goal.