GUMAR Posted September 27, 2014 Posted September 27, 2014 (edited) We found some bugs and also made researches (by our professional mechanics) and other users. Avionics bugs: -Knobs on KPP and NPP DO work when there is no electrical power, or dependent systems switched off -Initial position of KPP is wrong (pitch barrel must be in position -90 degrees, and figure of airplane must be leveled ) -Pitch barrel is not a barrel, or cylinder, it is a tape. So when it reaches 90 degree position, figure of the airplane goes inverted and tape goes back. Also it is not a fabric (It's looking like there is written smth with a pencil - looks weird ). -Indicator of current heading can't rotate so fast, and make such rapid movements -RSBN beacons are located in one particular place. In reality there is 1 azimuthal/DME beacon near the center of the RWY and 2 PRMG groups: GS beacon abeam touchdown zone (with DME retranslator - when you switched to LANDING ch., you know your distance to TDZ), and localizer behind the RWY. Plus 2 beacons for opposite RWY heading. -Initial position of director bars is not correct. They are not disappearing when not working, they are remaining in center position. Horizontal bar for -vertical guidance moves parallel. -Landing and Nav channels of RSBN do not have one number, usually different. -When canopy is thrown back from air flow it is jettisoned like pilot initiated canopy jettison. That's not correct. -Turbostarter is not starting when fuel pumps are off, but it must be starting. -When throttle is in STOP position turbostarter is not running, but it must initiate a Cold start -No EGT overshoot during engine startup. -RPM needle during start up rotates with constant speed except very begining, and it jumps rapidly. -There is no sound of converters (They're making much noise...) -Sound of engine working is too low -When you turn on the battery switches, background 50Hz noise appears -AC generator works without engine running -Radar RP-22SMA works well without warming it up -In some cases if you push flashing SORC it continues to flash -No visual effects of one of rocket booster when it;s working -Afterburner flames pulsating too intense -RPM needles are behaving strange when you cut off all electrical power: They can turn counterclockwise from right part of the indicator, when you turn elect. power on. -Also, if you shut down the engine, and try to start it up when there some RPM, those needles rapidly go to zero and start indicating that RPM is going from zero -Working turbostarter has no sound frome outside How Su-24-s KPP works, all by User. Everything is confirmed by Flyning-CAT - flight and navigation system specialist. *SKV in Su-24 is same as KSI in MiG21BIS. 0.00 - KPP is on (pitch indication and real attitude disagree ). SKV is off. Pitch tape indicates almost 80 deg. Miniature airplane is tilting. 0.05 - KPP is turned off. SKV is off, pitch indication now is 90 degrees. Airplane stays at psition when KPP was turned off. 0.16 - Turning ON SKV. KPP is off. Red caging light is on. 0.45 - Red light "Cage" turns off. 0.48 - Turning on KPP. SKV is ON. Attitude indications are becoming "straight and leveled". 0.55 - Turning OFF SKV. KPP is still ON. Bank angle indication is going disagreed. BUT pitch indication stays 0. 1.25 - Now KPP is turned off. SKV is off. Airplane freezes, pitch tape goes into a 90 degree dive. Also look the photos of turned off KPP of different airplanes Here KPP and SKV was on. Then, if you turn off KPP first, it will look same as on the photos and video below If you first turn off the SKV, for the time when KPP is ON you can see attitude disagree in bank, pitch is staying 0. THen, if you turn off KPP, bank angle freezes, and pitch goes into 90 deg dive. This is a "behaviour" of KPP during caging process. First SKV was turned ON, immediately after it KPP. It is seen here, how pitch is fluctuating. When red light was off, pitch freezed at 0 This is how ground equipment of RSBN is located Some text about typical location of radionav aids on the airdrome (in russian) - Oxygen supply bug. High oxygen flow speed, and indication error. WITH PICTURES! - Something weird happens when there is a crosswind. - Airplane banking on upwind wing, and has a sideslip angle. I've tried 30 knots ccrosswind take-offs and landings and noticed this strange mig's behavior. Wind 90 deg from the left, look at ball... - I have another point to your list in the first post, regarding the DME. It seems to show pure ground distance to the RSBN instead of slant range. - Engine stopped in flight, warning light of "ГЕНЕРАТОР ="(DC Gen off) went ON, but ГЕНЕРАТОР ~ (AC Gen off) didn't and radar continued working by User - Tactical release switch must prevent any bomb release, now they are released, with no explosion, like they are emergency released in "НЕВЗРЫВ"(Not Armed) mode. If tact. release switch is in off position, only emergency release is possible. To be continued... Edited March 12, 2015 by Cobra847 3 [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
Corrigan Posted September 27, 2014 Posted September 27, 2014 Great idea, thanks! Win10 x64 | SSDs | i5 2500K @ 4.4 GHz | 16 GB RAM | GTX 970 | TM Warthog HOTAS | Saitek pedals | TIR5
TurboHog Posted September 27, 2014 Posted September 27, 2014 That's an impressive list! Many thanks to all those involved in tracking down these bugs. Is LN aware of these findings? 'Frett'
GUMAR Posted September 27, 2014 Author Posted September 27, 2014 That's an impressive list! Many thanks to all those involved in tracking down these bugs. Is LN aware of these findings? Hope they will. These guys are digging, and digging, and digging... Bugs :) [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
uboats Posted September 27, 2014 Posted September 27, 2014 just went through the rsbn script, it seems that the location of rsbn/prmg station is simplified as the location of the airport. [sIGPIC][/sIGPIC] My DCS Mods, Skins, Utilities and Scripts | Windows 10 | i7-4790K | GTX 980Ti Hybrid | 32GB RAM | 3TB SSD | | TM Warthog Stick | CH Pro Throttle + Pro Pedal | TIR5 Pro | TM MFD Cougar | Gun Camera: PrtScn |
ff4life4 Posted September 27, 2014 Posted September 27, 2014 Wow that's a laundry list. Thanks for posting
Cobra847 Posted September 27, 2014 Posted September 27, 2014 Thanks for the compilation. We've been following the Russian section; but we don't post much because of the language barrier (also sometimes we don't understand something when it is translated). Nicholas Dackard Founder & Lead Artist Heatblur Simulations https://www.facebook.com/heatblur/
Vinny002 Posted September 27, 2014 Posted September 27, 2014 Hi, gumar! You forgot 1 more thing to add your bug list: the oxygen consumption rate is excessive and the oxygen is still running even with the blue mixture/oxygen on. Thanks! Cheers, Vincent
GUMAR Posted September 28, 2014 Author Posted September 28, 2014 Thanks, Vincent! [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
Vinny002 Posted September 28, 2014 Posted September 28, 2014 Hi, gumar! You are very welcome! Cheers, Vincent
Sceptre Posted September 28, 2014 Posted September 28, 2014 GUMAR и User, отличная работа! Спасибо! RTX 2070 8GB | 32GB DDR4 2666 RAM | AMD Ryzen 5 3600 4.2Ghz | Asrock X570 | CH Fighterstick/Pro Throttle | TM MFDs | TrackIR 5
GUMAR Posted September 29, 2014 Author Posted September 29, 2014 Something weird happens when there is a crosswind. Airplane banking on upwind wing, and has a sideslip angle. I've tried 30 knots ccrosswind take-offs and landings and noticed this strange mig's behavior. [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
Justin Case Posted September 29, 2014 Posted September 29, 2014 Something weird happens when there is a crosswind. Airplane banking on upwind wing, and has a sideslip angle. I've tried 30 knots ccrosswind take-offs and landings and noticed this strange mig's behavior. What do you mean with "banking on upwind wing"? Is it like the F-15C where the yaw SAS for some reason tries to correct the heading towards the velocity vector, thus inducing a roll. Or is it in connection with you pushing rudder on the ground to maintain runway heading, which is normal. http://www.masterarms.se A Swedish Combat Flight Simulator Community.
GUMAR Posted September 30, 2014 Author Posted September 30, 2014 (edited) What do you mean with "banking on upwind wing"? Is it like the F-15C where the yaw SAS for some reason tries to correct the heading towards the velocity vector, thus inducing a roll. Or is it in connection with you pushing rudder on the ground to maintain runway heading, which is normal. Looks like first. I tried sustained horizontal flight with 19m/s crosswind. No rudder, or aileron inputs on RCtrl+R window. P.S. I do know something about it)) It's my job.:pilotfly: Wind 90 deg from the left, look at ball... Edited September 30, 2014 by GUMAR [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
Justin Case Posted September 30, 2014 Posted September 30, 2014 Sorry, I had to ask :) That's really strange and quite annoying, I will try it tonight or tomorrow when I get back home. http://www.masterarms.se A Swedish Combat Flight Simulator Community.
Justin Case Posted September 30, 2014 Posted September 30, 2014 I have another point to your list in the first post, regarding the DME. It seems to show pure ground distance to the RSBN instead of slant range. For those who don't know http://en.m.wikipedia.org/wiki/Slant_range http://www.masterarms.se A Swedish Combat Flight Simulator Community.
GUMAR Posted October 1, 2014 Author Posted October 1, 2014 Sorry, I had to ask :) Never mind, sometimes it helps from many questions:) I have another point to your list in the first post, regarding the DME. It seems to show pure ground distance to the RSBN instead of slant range. Confirm, there is such mistake. Horizontal stab. can not be moved directly without hydraulic boosters ("BU-51") working, therefore, on cold start stick can't be moved back and forward. "BU-45", without hydraulic pressure in booster hydraul. system, becomes a kind of a rod, so you can move ailerons directly. It's from technical oper. manual. In flight, when you are lowering your flaps to 45 deg. (land. position), they can extend partially because they are pushed by airflow. During speed decreasing, the will extend fully. After take off, or go around, they again pushed into less then 45 deg position. Еще написано, что в полете при выпуске закрылков на 45, они в это положение встанут не сразу, под воздействием сопротивления воздуха, а постепенно при уменьшении скорости. Также и при взлете они немного уходят, но только сколько это немного, и как при этом работает индикация в кабине не нашел. Надо в аошных доках глянуть. П. С. Нашел немного.: Last piece of text (MiG-21UM FM) tells us that, BLS is turned of whenever the flaps are in less than 30 deg position, or N1 RPM is less than 45-50% If speed is more than 380 km/h flaps are pushed into position of less than 30 deg, and BLS is turned off, and airplane is loosing 25-30 m altitude. On cold start (turbostarter) switch must be in ON position (according to BIS FOM) [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
GUMAR Posted October 2, 2014 Author Posted October 2, 2014 (edited) - Engine stopped in flight, warning light of "ГЕНЕРАТОР ="(DC Gen off) went ON, but ГЕНЕРАТОР ~ (AC Gen off) didn't and radar continued working by User - Tactical release switch must prevent any bomb release, now they are released, with no explosion, like they are emergency released in "НЕВЗРЫВ"(Not Armed) mode. Short translation os Users post А я вот думаю, что не включив этот выключатель бомбы вообще не должны сбрасываться. Только аварийно, либо на взрыв либо на невзрыв, как раз от положения этого выключателя. Даже ума не приложу, для чего нужно сбрасывать бомбы с прицеливанием на невзрыв? В инстукции летчику миг-21ум такого способа бомбометания не написано :) Picture Этот выключатель используется, как еще одно средство предохранения от случайного сброса. Летчик может случайно, еще до полигона нажать боевую кнопку. Как правило он включается уже на боевом курсе и после захода выключается. На других самолетах он еще может называться "ГЛАВНЫЙ В". Edited October 2, 2014 by GUMAR [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
GUMAR Posted October 3, 2014 Author Posted October 3, 2014 Есть еще один нюанс, связанный с МБД. На тех МБД, что применялись на миге, а это кажется мбд2-67 стоят блоки интервалов. Это такой маленький блочок внутри балки в носовой части, под лючком. На нем стоит галетный переключатель на две позиции - 0.1 и 0.2 секунды. Перед вылетом специалист по вооружению должен установить такое положение, которое предусмотрено на вылет. Летчик перед вылетом при осмотре самолета обязан этот элемент проверить. Этот интервал влияет на промежуток времени между сбросом бомб на одной МБД, что влияет на расстояние разрывов на земле. Inside the nose part of multiple ejector rack (MBD2-67) there is an interval selector unit. There is a selector- 0,1 sec and 0,2 sec. Before the flight, mechanic, switches that selector accordingg to flight plan. Pilot during preflight check should check for desired setting of the interval. It is the time interval, after which, next bomb is dropped from one MER. So, we should have 0,1 or 0,2, doesn't matter which of them, but no other. [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
zaelu Posted October 3, 2014 Posted October 3, 2014 Maybe it should be added an option for ground crew comunication... Bomb release interval 0.1 or 0.2 seconds. [sIGPIC][/sIGPIC] I5 4670k, 32GB, GTX 1070, Thrustmaster TFRP, G940 Throttle extremely modded with Bodnar 0836X and Bu0836A, Warthog Joystick with F-18 grip, Oculus Rift S - Almost all is made from gifts from friends, the most expensive parts at least
WinterH Posted October 3, 2014 Posted October 3, 2014 I would love if there would be a new interface in core DCS for setting all things pre-takeoff like cluster bomb burst times, trim settings for Dora and bomb release intervals for MiG. Wishlist: F-4E Block 53 +, MiG-27K, Su-17M3 or M4, AH-1F or W circa 80s or early 90s, J35 Draken, Kfir C7, Mirage III/V DCS-Dismounts Script
Mode Posted October 3, 2014 Posted October 3, 2014 There seems to be a mistake in logic of the tactical drop switch. If the tactical drop switch is off we couldn't release bombs in normal mode only emergency. That's a User's supposition. Another one thing from User. A missile (A-A) can't be dropped without a guided missile launcher. It's not provided by the construction. A missile can be dropped only with a guided missile launcher. It's the same principle as in A-10
GUMAR Posted October 6, 2014 Author Posted October 6, 2014 (edited) Mismatch with FOM in lilluminating some lights. COnditions, when lights must illuminate written below. (MiG-21bis FOM) Some more errors in indication in User's post Несоответствие: на настоящем самолете аварийное сбрасывание подвесок, а также сбрасывание баков, происходит от источника постоянного тока.... On real aircraft, emergency stores jettison, and fuel tanks jettison is powerd by DC bus, so we don't need any AC electrical power. Edited October 6, 2014 by GUMAR [sIGPIC][/sIGPIC] Реальные хотелки к ЛО3 по Су-25 в основном... ASRock PG9, i-5 9600KF, MSI 2080Ti, 32GB 3466
Mode Posted October 6, 2014 Posted October 6, 2014 (edited) Using of Kh-66 missiles is pretty unreal. First: the fixed-beam mode is called so because it is literally fixed i.e. the beam can't move at all. Second: the radar can't lock on a point or an object on the ground.The real algorithm of Kh-66 use: a pilot holds the reticle (on the ASP) on his target by maneuvering the plane. The reticle is unmoved. A pilot has to hold the reticle on a target (by maneuvers) until the target is hit. Some pilots use the fixed grid during guiding the missile. That was taken from our discussion in the russian part of the forum. Here: http://forums.eagle.ru/showthread.php?t=131078&page=3 Edited November 2, 2014 by Mode
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