foxbat155

Well, you little over-interpreting that video. In Soviet Union ( and now in many post SU countries ) this was part of normal crew training program. Flights without fancy navigation aids ( dopplers, ARK's, RSBN's ) were important part. During those flights was forbidden use electronic aids, only maps, eyes and public road network. That's why you can see so many videos from former SU area with military aircrafts and helicopters flying along roads. And when during that training you lost orientation, then you have to find way to get info were are you now. Who knows roads best? TIR drivers!.

Well, I don't think this is some difficult upgrade, and even in reality some vanilla Bises flyes with R-73 e.g. cuban aircraft: APU-72 launcher is clearly visible under wing. But honestly I have no idea is this some local initiative or original Russian concept. Anyway already R-60 is kind of simple addition (upgrade) to weapon system, that's why R-60 light panel looks so "pasted". Originally Bis didn't had those missiles, and aircrafts sold abroad SU got them only from year 1984 ( even Warsaw Pact machines ).

Well, honestly I don't think that any more complicated procedures will be modeled in predictable future, but generally this is interesting things, I saw few pictures with missiles after "dead" launch. From reality point of view this is nice addition to game ( but maybe only for some purist ). I think this is aim of EL instalation work. EL circuits bypassing weapon system connections in order to simplifie whole operation and save time. EL button just igniting rocket engine and switches on aileron blokade ( missile should keep straight flight to avoid collision with aircraft ). In R-3S description I found information that engine have double electric igniters. So maybe first one is for "normal" launch and "normal" EL, and second is for forced launch after that first unsuccessful.

That good find Frederf :thumbup:. But I think there can be a difference between EL after unsuccessful combat launch, and "normal" EL ( n.e. before emergency landing ). In first case all systems were already on, just engine didn't start from some reasons. In second case no weapon system activity, no communication between missile and aircraft, only signal to ignite missile's engine. Anyway I found clear statement in manual text that R-55 is fired without sound lock signal, only lights indicating readiness for launch.

Honestly I not sure, in weapon manual is just stated that electric voltage is given to rocket engine igniter and ailerons control system and seeker is not power on. This is not combat launch, no target tracking so for me logically no need to power on proximity fuse but I can be wrong. Both missiles have self-destruction timer ( 25-26 sec. after launch for R-3S and 26-34 sec. for R-3R ), contact fuse on the ailerons tips ( 4 pieces ) and optical proximity fuse for R-3S ( two independent channels ) and radio proximity fuse for R-3R ( two channels as well ). Yes, according "papers" this is no less like 21 sec. of guided flight time. That why R-3S cannot be call a simple reverse enginering of AIM-9B. R-3S wasn't first Soviet IR missile, they had lot of technology in that matter. So why they copy AIM-9?, well Soviet IR missiles had one problem in that time - very complicated seeker construction. Soviet were suprised how simple,durable and effectiv Sidewinder seeker was. First production variant was R-3 ( straight copy of AIM-9B ), but production run was very short. Engineers changed many elements inside, but retained guidance seeker. Main change was new gas generator and new turbo generator. After that change missile's systems got twice more energy on board to power on systems, from 11 sec. to no less 21 sec.. Btw., I found lately nice photos of PARG-13MWW front ( antenna ) part.

Difference between L-39 and MiG-21, well I never was reading anything regarding Albatros ( although I have some bunch of papers ). But situation when the same missile working a bit different on different aircrafts is possible, e.g. R-60M on Fishbed have blocked seeker, on Fulcrum not, so maybe reason is in the difference in weapon system capabilites. Maybe RP-22SM requires seekers looking straight ahead , because this is only situation, when she is able work out launch zones. On L-39 weapon system generally don't exist, it's just few electrical connections and switches and g limiter. No weapon computer ( whatever analog or digital ), no launch zones calculating..... just power on and shot. Emergency missiles launch is just powering missile engine, no seeker power on, ailerons are blocked in 0 deg. position. Apart engine only time self-destruction mechanism is working. About lock sound everything is very clear. R-3S, R-13M, R-60's missiles have bulit-in sound generator, which transforming electrical signals from seeker into sound. Intensity of that sound depends directly from lock signal strength, and pilot is able define how stable is target tracking by missile seeker. R-3R have as well some kind of "lock on" sound modulation because in missile description is wroted that seeker generating sound from 60Hz to 300Hz. And one more interesting stuff: R-3's bulit-in sound generator produces "noise" sound when missiles are power up and no "lock" signal ( and we have this in L-39 module ). In pilot's flight manual is stated "after appear maximum sound signal and light "Launch" is on, missile firing is allowed ", so seems that we should have in game some sound modulation. I did some deeper reading of that weapon manual, so I have to write corrections to my last post, R-55 is more complicated like I thought. S-59 seeker is cooperating with BS-59M "connection box" instaled inside aircraft fuselage between frames 12 and 13. Missile seeker can be set in one of four modes: basic "Electric lock" seeker mirror along the longitudinal axis, "Horizont" ( seeker mirror is set 4,5 deg up ), "Altitude correction" ( seeker mirror is set 6,5 deg down ), "Exceeding" ( seeker mirror is set 6 deg up ). From the manual text appears that all that additional seeker settings are pre seted, but no words about purpose of that modes. It seems that missile seeker mirror is not caged before launch, because manual is saying "when gimbal will exceeds 20 deg from axis then BS-59M will produce "Lock on drop" signal and seeker will back to initial position". According MiG-21Bis pilot's manual, R-55 launch requiring only weapon system allow command - lamp "Ready 55 left" or "Ready 55 right", no word about sound signal. Now few words about over g blokade. This function is provided by transmitter called MP-28MT, which produces signals for weapon system when R-3S, R-3R and R-13M missiles are hung under wings. MP-28 cooperate with altitude sensors WS-5500 and WS-12000, because maximum g value is change depending height. For R-3S and R-3R missiles maximum launch g is 2 on heights up to 12000 m, and 1,6 g for altitude over 12000 m, for R-13M is 3,7 g at all heights. In over g conditions MP-28 sends signal which block signals from launch button, and block "Launch" lamp. So seems that only in R-55 case pilot have to remember about missile's g limitation and only R-55 have uncaged seeker before launch.

Yes, R-3S missile seeker is caged during launch ( the same front rudders and back gyroailerons ), uncaged, according manual, 0.5-0.7 sec. after launch. FOV for seeker mirror is -+ 1,65 deg. ( 3,3 total ). Mirror gimbal can be move -+20 deg. so total seeker FOV after launch is 43,3 deg. The same about R-60, R-60M and R-13M, their's seekers are caged until launch. Mirror FOV for R-60 is 5 deg. total, R-60M 8 deg. total, R-13M 3 deg total. On newer aircrafts in R-60M case, is possible target cueing manualy by button on the control stick ( MiG-23 ) or automaticaly by weapon system ( MiG-29, Su-27 ), and then mirror gimbal is uncaged. According polish MiG-21Bis pilot manual if you have weapon switch in position 1-2 or 3-4 both missile will fired after pressing EL button, if double launchers are in use, pilot need press EL button twice ( firing first pair and then second ). I understand quoted manual ( Polish is my native language ) this way: for all missiles exist physical barier preventing from fire, this is "lock on" signal from seeker ( no "lock on", no missile engine start command ), for R-3S/R-3R is additional barrier for g-load over 2 ( blocking mechanismus ). For R-60 and R-60M generally no g barrier ( both can be fired up to 8g ), for R-55 ( up to 5g ) and R-13M ( up to 3,7g ) pilot have to remember about limitations because no technical devices for blocking over g fire.

I love MiG-21 because of lovely cockpit :thumbup:, and because those triangles were flying over my head all my childhood ( I grow up in close distance from one of military airfields in Poland ). During holidays I was lying on the grass beside my parents house with my friends and we were watched them all day long. For me MiG-21 is synonym of jet aircraft, Tumansky engine sound is best music for my ears. MiG-21 is irremovable part of my memories from childhood. High level flights, low level flights, turning fights, my father was always angry on them, I think he don't like noise.....:huh: . I hope some day ( maybe with 2.5 ) we will get proper Bis. I'm not sure that is possible reception module from one developer and transfer to another. I think we still should have trust to M3 and gave them a bit time. Anyway in my opinion ED should launch some quality control program relative to Third Party developers. This is good for both sides: customers have a signal that ED keeps eye on quality, developers have motivation to improve their products.

That dispensers ( or simmilar ) didn't had use on the J-22 Orao?

In RL ASO-2 dispensers in SPS were filledd only with chaff charges, that why on the control box pilot can choose beetwen manual and auto mode. In auto mode chaffs were fired automaticaly, triggered by signal from SPO ( lock-on signal ). In 60's when that pod was created IR missiles wasn't treated as really serious danger, SPS pod was intended mainly to deal with surface-air radar guided missiles. The same instalation was fitted in recce pods used by MiG-21R. Of course those dispensers are universal (flares or chaffs ), even PPI cartriges are identical except what is inside ( dipols or thermite ), but in everyday service in 60's and most 70's were filled only with chaffs. Under fuselage chaff/flare instalation from game don't use ASO-2 dispensers, this is no Soviet product. This instalation was cooperation between Yugoslavia and Bulgaria and if I don't mistaken is caled POMIG. Soviet-made under fuselage instalation show up during Afgan war and used standard ASO-2 dispensers, and those can be filled with flare and chaffs, but not simultaneously: chaffs or flares, so if you wanna both kinds of charges, you have to fill one dispenser with chaffs and second with flares. That about RL stuff. And one another important thing: whatever which under fuselage instalation we have, inside cockpit should we have control box.

You right zer0-crash except RN-24 and SPS pod.

Good news Asla, in that period ( about 1972, when Bis entered service ) 99.9 % of F-5 had no RWR at all, so Soviet SPO-10 was enough good. SPO-15 production start is 1976 together with Su-17M3. Sorry for off-topic.

Yes, literally should by "Nearer" and "Further". Automatic switching is triggered by MRP-56 "Marker receiver", so you need overfly NDB with +-10 deg accuracy.

I checked my archive and I found technical description for ARK-10. And well.... I was wrong with that rotary switch:music_whistling: ( sugested by ARK-15 operation scheme ). That switch is for choose "Near" NDB's from already stored under 2,4,6,8 buttons on main ARK panel when pilot wanna automatic ARK operation during landing procedure. Main switch should by in "Far" position, then pilot have to press one of 1,3,5,7 buttons , and then on rotary switch have to choose appriopriate number of "Near" NDB. Now about I/II position difference. Main programing unit ( hidden in front avionic bay ) have special circuit for "fast tunning".Position "I" is for tunning without "fast circuit", "II" with that circuit. Normal time for frequency switch is up to 8 sec., "fast" up to 4 sec. ( with a bit worse accuracy if I good understood ).

In RL rotary switch is for choose "Near" ( or other word "Inner" ) NDB frequency range, in DCS for region choose. I hope some day we will get ARK and RSBN which works like in RL.

You right Frederf, no "Auto" position in MiG-21Bis, I just mistaken with Su-20 ( have the same ARK type ). So in MiG-21 switch in position "Far" will cause automatic tune to "Inner" from range set on rotary switch (triggered by signal from MRP-56 ). Like I was wrote before 9 main frequencies can be set in any combination, but usualy "Far" are under odd buttons, "Inner" under even buttons.

Everything is very simple. ARK-10 working in 8 frequency ranges: 1. 120-279,5 kHz, 2. 280-439,5 kHz, 3. 440-579,5 kHz, 4. 580-739,5 kHz, 5. 740-879,5 kHz, 6. 880-1039,5 kHz, 7. 1020-1179,5 kHz, 8. 1180-1340 kHz. Under buttons 1-9 you can store 9 frequencies. Combination is arbitrary, can be 9 Far NDB's or 4 Far + 4 Near NDB's etc. When pilot is using "Far-Auto-Near" switch in "Auto" position then he have to choose Far NDB from buttons 1-9 and from rotary switch Near NDB frequency range and ARK will switch automaticaly between them when aircraft will pass Far NDB. Most Near NDB's had frequency from ranges 2,4,6,8 and thats why we can see those numbers on that rotary switch dial. Pilot can choose one of two steeping: by 1 kHz or by 0,5 kHz, so if Near NDB frequency is 295 you need switch to 2/I position, if 295,5 you need switch to 2/II position. ARK will tune automatically to strongest signal from choosen frequency range.

Yes, always you have to feed target size, angles (different for canons, FFAR's and bombs ), distance is feeding automaticaly from rangefinder/radar. General accuracy is worse compare to ASP-PFD-21 because ballistic computer use less data to correct reticle.

Yep, MiG-21F/F-13 had the same gunsight, just in different subvariant. Main difference is possibilty of use something what was called SIW-52. SIW was kind of night vision binocular, and was mounted on glass reflector on right side. A/G modes?. Generally the same like in MiG-21, only difference is lack of second fixed reticle and less automation ( ASP-5 is considered as half automatic, ASP-21 as automatic gunsight ). Nice photos?. What about those: Interesting video from tear down: Cheers.:thumbup:

60 rounds per canon ( so total: F 120 rounds, F-13 60 rounds ). R-3 launch boxes were mounted in place of deleted right canon, but left canon stayed with his full round capacity.

MiG-19 got new ASP-5N gunsight, much better like ASP-3 from MiG-15/17, and for his time was very advanced ( circa 1953 ). As standard ASP-5 was connected with radio rangefinders SRD-1M, SRD-5M (A-A) or SRD-5MK (A-G), SRD-3. Gunsight was driven by gyro unit and analog ballistic computer. Later those gunsights were mounted on early MiGs-21 ( F, F-13, U, US ) and Su-7 ( B,BM, early BMK, early BKL and UM ). ASP-5 was basis to create ASP-PF-21/ASP-PFB-7. Few photos:

Great pictures gentleman!. I'm sure, this will be brilliant module, fingers crossed. Good luck!.:thumbup:

Generally you right, Yak-38 had MiG-21 weapon system (excluding radar), the same gunsight with analog computer, the same navigation system ( RSBN-36 was a RSBN-5S modification ), max weapon payload for VTOL was 1100 kg, for STOL 1500 kg (later M variant aircrafts 1500 and 2000 kg accordingly ), tactical radius 185-580 km ( depending takeoff technic and overall payload, flight altitude ), max flight endurance 1h 40 min. So almost all data are very simmilar to MiG-21. Only speeds are smaller, but maneuverability was considered by pilots as much better like in MiG-21. What is interesting, Yak-38 units used MiG-21 as training aircrafts because of many simmilarities. But realistically, I don't think that documentation will be possible to obtain for that aircraft. It's not about some big fuel consuption, but rather low amount of fuel, only 2976 kg.

I'm not sure, but is not already opened thread about those switches in bugtracker?.

Yes, both reticles have bulbs with doubled filaments, and both have main-emergency switch. I think in switching moments should be some short darkening effect, like in home or car when you wanna turn off one light and turn on another.