We tested the igniter and it worked.   Our next plan is to hook the igniter up to a DAQ and get some numerical data.   We fed it with known pressures on the feed lines but we do not know the actual pressure drop from the plumbing.   Our next run should have a pressure transducer on the chamber, one of the fuel side before the orifice, and one of the oxidizer side before the orifice.   This will allow is to know the exact pressure differences to get accurate flow rates.   There was some instability and we think it is due to our L*.   We are extending the chamber a bit on the next run to see if it clears up.   I also want to try the glow plugs from RC vehicles.   The automotive glow plug does consume a lot of current.   You will see jumper cables in the photo from the test.   We needed those because we had killed our small battery intended for the test.   Our battery has a 7Ah rating.   We testing it many times for propane ignition in the lab and didn't get a recharge.   The RC type glow plugs draw far less current that the auto and we hope they will work.   This will definitely simplify the system even further from the original spark based ignition.

We also want to reduce the throat size.   The throat we used was very large compared to the throat we need.   We did that on purpose.   We wanted to get the igniter working at low pressures first and then work our way up.