finger

Yes,weapon systems are the same from 21M version to 21BIS with a little difference. Attention- big difference is in guided missiles .

Personaly sources

Of course the biggest ring is not a part of piper,it only helped me to draw picture.

When mirror of gyroscope is spun by el.motor and piper is light up,we can see something like this.Evry diamonds and central dot of piper must draw a ring.From start big,then fluently smaller and smaller until piper reached full stabilization(3-4sec)-dampering button not used.

It can be interesting.Distance between pilot's eyes and glass of sight head.

Fixed net There is small cross under boresight line(11 mils)This is aiming point for firing by gun on ground targets. The position of this cross is computed for those conditions: dive angle- 35 degree A/C velocity- 800 km/h target distance- 1500m So,there is possibility to use two weapons in one attack.

Angle scale. In real sight this scale is used for setting vertical aiming angle for GUN or RKTS,in GROUND mode. Switches position:GUN-RKTS,FIRE,AUT-MAN,GYRO,GROUND,slant range can be from radar or from slant range box. When we will be switching between GUN or RKTS position(AUTO-mode),we can see piper movement from boresight(0 degree) downward,acording ball. box of RKTS(we can see position on angle knob) When we are in MAN mode,we can seet its manualy by hand. This vertical aiming angle is set by two-way mirror. In AIR mode. Switches position:SS,AUT,RKTS,FIRE,AIR and SARH missiles(only)vertical aiming angle will be set on 3degree downward from boresight.This is fixed value for each SARH missile. Reason:Boresight line and beam line must be parallel,so missile can fly into radar beam. Bombing mode. Switches position:B,MAN,SS. The pilot manualy set vertical aiming angle according to bomb chart.

Well,I am back Couple of words about BREAK OFF and LAUNCH AUTHORIZED lights logic. When we are in- AIR- mode GUN ,AUT or MAN and distance to target is bigger than 2000 m, lights are OFF,needle is fully right. When distance is 1950m LAUNCH light is ON untill it reached 600-650m. Now LAUNCH goes OFF and BREAK OFF goes ON untill minim distance-fully left. The needle movement is very fluently. When we are in-GROUND-mode GUN-RKTS (S-5M,K) AUT or MAN and distance to target is bigger than 2000m,lights are OFF,needle is fully right. When distance is 1950m LAUNCH light is ON untill it reached 1200m,now LAUNCH goes OFF and BREAK OFF goes ON untill minim. distance. -GROUND-mode RKTS(S-24)-all is the same,except distance of change which is 1600m In analog.computer must be insert proper ballistic box(early model),or switch in proper position(late model) Small overlapping between lights is allowed,in moment of change. For guided missiles(scale 1-9km). Both lights are controlled by radar-target must be LOCK. For IR missiles R-13M,R-60M LAUNCH is ON at 9km-but pilot must have proper audio-signal in headphones (green light 60 must be ON) It mean that missile has target LOCK.by For SARH missiles R-3R,RS-2US- by light on radar screen. For CH-66 GROM (fixed beam mode)-LAUNCH is ON at 9km-but pilot must have visual contact with target. BREAK OFF is around 1700-1800m for all guided missiles.

Tomorow,patience please.

A little bit about PUS-36-68 and functional wiring diagram of unguided rocket control.

Yes,I have.

In DCS are spend shels perpendiculary with fuselage of aircraft-this is wrong animation. The spend shels are ejected from gun by velocity around 130km/h backward,plus velocity of aircraft.

Wrong graphical animation willbe better interpretation,sorry.You can see attachement of SPRD-99(angle)and nozzle angle too.On YT you can find many videos about SPRD-99 useing. In DCS animation are flames parallelly with fuselage of aircraft.