spyro23 Posted May 28, 2014 Posted May 28, 2014 Having seen beautiful afterburner effects on recent Youtube video I’ve noticed that engine nozzle opens as (simultaneously) reheating /afterburner is engaged which seems to be wrong. According to my knowledge proper sequence for R25-300 engine afterburner engagement should be as follows: 1. Throttle set from MIL to Reheat 2. Nozzle opens which is accompanied with RPM increase (LP rotor up to 106.5%) and EGT drop (up to 20⁰C) and thrust drop (up to ~85-90% of MIL thrust) and this condition last for 1-2 sec. 3. Afterburner is lit and parameters go back to nominal for this setting So my question to Devs is whether such sequence will be simulated in DCS MiG-21 (and only visual effect is missing ATM) or this part of engine will be simplified for whatever purpose? 2 [sIGPIC][/sIGPIC]
Sceptre Posted May 28, 2014 Posted May 28, 2014 They stated that the footage shown in the video is WIP so it does not necessarily represent the final release. RTX 2070 8GB | 32GB DDR4 2666 RAM | AMD Ryzen 5 3600 4.2Ghz | Asrock X570 | CH Fighterstick/Pro Throttle | TM MFDs | TrackIR 5
Cobra847 Posted June 8, 2014 Posted June 8, 2014 Will give the nozzle animations a check ASAP. Thanks for the heads up! Nicholas Dackard Founder & Lead Artist Heatblur Simulations https://www.facebook.com/heatblur/
DeathInACan Posted June 8, 2014 Posted June 8, 2014 I'm not sure if this is the right place for this but has anyone seen this, or is it old news? (I'm going to quote directly from the Wikipedia page). Perhaps the most dramatic WEP feature was found in the MiG-21bis fighter jet. This late variant of the standard Soviet light fighter plane was built as a stopgap measure to counter the newer and more powerful American F-16 and F/A-18 fighters until the next-generation MiG-29 could be introduced to service. The MiG-21bis received the upgraded Tumanski R-25 engine, which retained the standard 42 / 65 kN normal and forsazh power settings of earlier R-13 powerplants, but added a new super-afterburning system. Use of this "diamond regime" provided a massive 97.4 kN of thrust for no more than 3 minutes in actual wartime use. Use of this temporary power gave the MiG-21bis slightly better than 1:1 thrust-to-weight ratio and a climbing rate of 254 meters/second, equalling the F-16's nominal capabilities in close-quarters dogfight. In air combat practice with the MiG-21bis, use of WEP thrust was limited to 1 minute, to spare on the engines' 800 flight hours lifetime, since every second of super-afterburner use counted as several minutes of regular power run due to extreme thermal stress. When WEP was on, the MiG-21bis's R-25 engine produced a huge 5 meter long blowtorch exhaust - the six or seven brightly glowing rhomboid "shock diamonds" visible inside the flames gave the emergency-power setting its "diamond regime" name. Source:http://en.wikipedia.org/wiki/War_emergency_power 1 AMD 1090T X6 @4.01Ghz, XFX 6950 890/1375, 8GB Corsair Vengeance DDR3-1600, WD Velociraptor 600GB, complete watercooling setup, Dell U2711 + Dell U2410, Thrustmaster Warthog, Saitek Combat Rudder, Track IR5
hypersonik Posted June 8, 2014 Posted June 8, 2014 ^ Interesting, is engine modeled the one with the super AB? DCSW wishlist : multi-crew :D GTX480, i52400, 8GB, Samsung EVO 840 250G SSD, Raid 0 2TB =~45 FPS [Maxed] [sIGPIC][/sIGPIC]
Zakatak Posted June 8, 2014 Posted June 8, 2014 ^ Interesting, is engine modeled the one with the super AB? Super AB! I vaguely recall Beczl saying that this was referred as "ChR time," and that every minute spent in this state was marked down as an hour in the maintenance logbook. Also, OP, cite your sources so they know this is proper operation of the engine.
spyro23 Posted June 8, 2014 Author Posted June 8, 2014 I'm preety sure Devs have all manuals needed, which in this case would be Pilot's Flight operating instructions and R-25-300(изделие 25) manual. If anyone is interested in english Pilot's Flight operating instructions for BIS check this: http://books.google.pl/books?id=Hy6020COY1sC&printsec=frontcover&dq=Mikoyan-Gurevich+MiG-21+Pilot%27s+Flight+Operating+Instructions&hl=pl&sa=X&ei=6QmUU--xEszHPazagbAL&ved=0CC8Q6AEwAA#v=onepage&q=Mikoyan-Gurevich%20MiG-21%20Pilot%27s%20Flight%20Operating%20Instructions&f=false [sIGPIC][/sIGPIC]
F l a n k e r Posted June 8, 2014 Posted June 8, 2014 Having seen beautiful afterburner effects on recent Youtube video I’ve noticed that engine nozzle opens as (simultaneously) reheating /afterburner is engaged which seems to be wrong. According to my knowledge proper sequence for R25-300 engine afterburner engagement should be as follows: 1. Throttle set from MIL to Reheat 2. Nozzle opens which is accompanied with RPM increase (LP rotor up to 106.5%) and EGT drop (up to 20⁰C) and thrust drop (up to ~85-90% of MIL thrust) and this condition last for 1-2 sec. 3. Afterburner is lit and parameters go back to nominal for this setting So my question to Devs is whether such sequence will be simulated in DCS MiG-21 (and only visual effect is missing ATM) or this part of engine will be simplified for whatever purpose? Thank you for sharing that, spyro23. Allesmor Obranna said something similar in http://forums.eagle.ru/showpost.php?p=2079533&postcount=161.
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