LFE dev. research (also peer/mentor interview) qustions: SENSORS: Data sampling rate -> we will use at least 10KHz (enough for combust-instability) Most important measured quantities & locations embedded thermocouple at throat somehow? reccomended pressure transducer make/model for chamber? standpipe design for LOX dome transducer ignition dection? How do you do it in your setup? PLUMBING: philospohy for threads, seals, fittings selection ->"AN, SealLok, MS straight thread" SAE standards for boss, ports and threads what is your run valves actuation time -> how does this affect your sequencing approach? have you encountered problems with regulator droop for pressurant? are you using any baffeling or pressurant diffusers to avoid 2-phase flow (esp. LOX side)? prop tank pressure relief valves Cv > regulator Cv (in case of reg fail open or just burst disk)? actuated ball valves on tanks for both pressure relief/sys safing and draining? fill level detection for LOX? what tank insulation do you use? is there a standard for this? what's the thermal conductivity of the nomex cored composite? leak test? low gas pressure & snoop? another procedure? is there a restrictor orrifice to the ignitor GOX heat exchanger? FMEA: how do you approach FMEA systematically (do you have idustry mentors for high press. LOX sys)? ENGINE CONTROLLER: what defined exceptions do you use that trigger auto-shutdown and pad safing? ->what sensors and limiting values do you use for this? (thrust, chamber pressure, injector pressure, tank pressure?) how many sensor channels? what DAQ used? issues? OPS: what is your procedure for LOX filling any non-obvious safety procedures you've learned the hard way? what is your nitrogen purge procedure like for the LOX side (how long do you flow for)? any non-obvious regulatory issues encountered? INJECTOR: injector cold flow tests -> quantifying atomization COMBUSTION CHAMBER DESIGN: frozen flow is more conservative, so we use that (is equilibrium more justified for larger engines?) DOWN THE ROAD: flight weighting LOX valve/actuators? why did you go with the welded tanks? why not in-houe fab w/ machined walls and bolted endcaps? what are you doing in terms of slosh/vortex baffeling? open question: is there a better way of doing hardware configuration control than git? TOTALLY UNRELATED: A dedicated web person who understands Jekyll and git would be good MDO: Can I have a constraint of one value must be an integer