John Wojnaroski wrote: > Actually using a set of glass displays I've developed that match the > 747 flight deck. Runs on a seperate machine with a LAN interface and > has a full set of EICAS (Engine Instruments Crew Alerting System) and > Navigtion displays.
Oh yeah. Duh. I knew that. :) I *will* try that someday, but I'm lacking the required second machine at the moment. > Just need to get the "turbine data" across the > link (Assuming that YASIM is generating N1, N2, EGT, EPR, oil > pressure, fuel flow, etc) Sure thing: /engines/engine[n]/n1 /engines/engine[n]/n2 /engines/engine[n]/epr /engines/engine[n]/egt-degf /engines/engine[n]/fuel-flow-gph No oil pressure though, because I haven't seen any data on what it should look like. I suspect it'll just scale linearly (with a zero-offset) with N1 (presuming that's the turbine stage that runs the oil pump) for a given engine. If you have cruise data for oil pressure, I'd love to see it. Also, recognize that these numbers have had only the most cursory testing; I make no promises. The actual numbers that the current jet model is turning out are those for a 707 turbojet at the same fractional power. The numbers themselves can be tuned to match any given engine, but no such work has been done yet. Specifically, you'll see EPR numbers that are too high for the turbofans the 747 is using. The fuel flow is based on a TSFC specified in the <jet> tag in the aircraft XML. I don't know if I got that right, either. Although this one is kind of academic as YASim doesn't actually consume fuel yet. :) It also gets a little goofy at supersonic speeds. Due to ram air compression, the power goes up with speed faster than a real engine should -- the F15 at mach 2.5 is showing something like 128% N1. Real engines have complicated inlet losses at high mach that aren't modelled. Not a problem with the 747, but just something you might notice. Andy -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA [EMAIL PROTECTED] http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
