DaveRindner Posted July 9, 2018 Posted July 9, 2018 So I am going by DOC start up. On page 17, when it time comes to start the engine. Wacky s**t happens. APU Gen is ON, GEN is ON, BATTERY ON, other switches as dictated. When ENG ST is ON, APU GEN kicks to OFF automatically, and nothing else happens. Engine remains cold. Three times manual, same problem. Auto-Start cheat works. So I am scratching my head, as it is very similar to issue I have in starting Mirage , which I put off to the side becouse French cockpit and confusing manual is annoying. What is the bloody heck am I doing wrong?
DaveRindner Posted July 9, 2018 Author Posted July 9, 2018 All good. Got it all figured out. I think. It seems that INS is already alighned as soon as a/c is started. Doesn't it take five minutes as in A-10C? Since both use EGI.
mvsgas Posted July 9, 2018 Posted July 9, 2018 INS is not fully model, is it is always align. As for the start, what was it? Did you leave the DECS switch off? To whom it may concern, I am an idiot, unfortunately for the world, I have a internet connection and a fondness for beer....apologies for that. Thank you for you patience. Many people don't want the truth, they want constant reassurance that whatever misconception/fallacies they believe in are true..
DaveRindner Posted July 9, 2018 Author Posted July 9, 2018 Silly me. I mistook fuel cuttoff handle ON position as OFF, or vice versa. DECS OFF, when I though it was ON, was an earlier mistake, that actually bit me in a weird way. Though , on that earlier attempt, I did have cuttoff handle properly set. Go figure! Any way, all the switches are set right, me thinks, but nothing is happening, powerplant is cold. OK, check everything, and I noticed that DECS was in OFF position. I am thinking I may have clicked on it twice by error. This gets better. In my earlier steps, I of course went off script, and released parking break on throttle. I did move the throttle a bit back and forth, and must have left it in non 10% AFT position. Then I flicked DECS ON, forgetting that I had already activated ENG ST, and canopy open. As soon as DECS flicked ON, the engine screamed . Not a gradual onset of RPM, but really fast spoolup. Engine started, but the JPT lit and stayed on for rest of mission. in RL , I supposed I would have toasted a nice Pegasus powerplant. So yeah, before turning the ignition key, make sure that DECS is ON and Fuel Cutoff handle is set DOWN position. On next mission attempt. Followed PDF, and no excitement. I have UH-1H module, and during my self-training, I must have toasted a dozen or more turbines. Makes one think , that in RL, a crew kisses their cross, or whatever faith they hold, say a prayer, go through pre-flight, and pre-start religiously, say another prayer, and press ENG ST or equivalent, then pray as they watch TOT or JPT or similar instrument. I would of thought that in modern gen 4 types, like AV-8B, or gen 3 turbine rotary, FADEC and engine governors would prevent hot starts and toasted turbines. I do not recall that in KA-50 BS2 module, with manual start, that I ever had a hot start. The procedure prevents it. Same for my A-10C, and Mig-21bis.
DaveRindner Posted July 9, 2018 Author Posted July 9, 2018 G limits are for maintenance and butt chewing CO. Over G shortens airframe life hours, increases maintenance costs, thus increasing cost to government, and affecting combat coding of airframes. In training , Over-G is a somewhat serious infraction, as max G is part of standing orders, unit SOP, and specific mission limits. Like turbine max temp or overtemp lights, max-G can only be reset by maintenance, on the ground. All the parameters are downloaded into digital maintenance file, for airframe, engine(s), and avionics. MILSPEC, as far as I know, is minimum 9G for 30 seconds, 10G for 10 seconds. For airframe, engine, radar, critical avionics. Thats with safety margin. Actual numbers are classified, and are probably higher. MIG-MAP claims that MIG-29 aiframe can sustain 12G without failiure, and it is impossible for any pilot to overstress the Fulcrum (yea, even the Russians are using that name). They claim the pilot would pass out or suffer trauma. Indeed, the dirty little secret of Kubinka, is that attempted Kobras, tail-slides, and Kulbits have cost more aviators their lives then F-15s and F-16s.
DaveRindner Posted July 9, 2018 Author Posted July 9, 2018 Now that I am flying and not crashing , usually, I will try to post what has already happened two times. OK so in a clean airframe with internal fuel only. Nozzles fully back, and IAS at 1000' agl around 550 kias. At around 500 kias or faster do a max roll rate barrel roll. Nose slightly up and hard roll to the port (left). Bang! The either the port or stbd wing comes off with fire and fury, and world tumbles at impossible rate. Eject before scree goes dark. So I am thinking, nothing bad happens doing the same thing at 450 knt. So what is the over-stress condition?
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