109K-4 Convergence

[ALFAMEGA51]

Simple Average Plane Pilots?  

 

oh good one 

[Nisky]

I set mine to 350, only for the fact that I'm used to it. Pick a close range and study the projection of the round. You can usually see it in front(over) or behind(below) your target. In the long run, pick one stick with it, eventually you'll be able to pull blackout shots. Junky knows what I'm talking about. I used to go dueling arena, when I first learned and did 109fs and 109gs with Scotch and Agent360. All you have to remember with convergence is round drop X distance X range of convergence. Obviously technical writing in math I'm handicap. Hopefully, someone will be along soon to correct me. Apologize for bad grammar and what-not I have been drinking.

[HL117]

I set mine to 350, only for the fact that I'm used to it. Pick a close range and study the projection of the round. You can usually see it in front(over) or behind(below) your target. In the long run, pick one stick with it, eventually you'll be able to pull blackout shots. Junky knows what I'm talking about. I used to go dueling arena, when I first learned and did 109fs and 109gs with Scotch and Agent360. All you have to remember with convergence is round drop X distance X range of convergence. Obviously technical writing in math I'm handicap. Hopefully, someone will be along soon to correct me. Apologize for bad grammar and what-not I have been drinking.

Totally made sense to me Nisky and I haven't had a drop  .........so this worries me. 


HL

[RedBull1]

Wonder what Grizz used to set his convergence to 

[nrshida]

Here you go buddy: 

What was the whole pseudo-personal attack thing in this thread about anyway? I could sense it's approach but didn't understand it when it got here 


I seldom fly the K-4 but I do fly the G-14 a little. I have the Mk-108 set to 600 yards, figuring that it's easier to adjust closer in than farther out. Really close in I often don't have time to look at the gunsight anyway in a crossing shot for example, it's just instinctive.

The only inconvenience is a chasing shot at 400 yards where you have to aim a bit low.


Do you have a visual regarding the dispersion sir bustr?

[bustr]

Going through the effort to produce your own is more meaningful. Below are the tools.

Build a gunsight in 512x512 1Mil=2Pixel format. Draw a 100Mil diameter circle and place a cross in it. Starting from the cross center Make 5Mil division marks out to the edge of the circle in all directions. At every 10Mil make the marks longer. Draw 4 lines one each 10Mil above then below the horizontal line and the same left and right of the verticle.

You now have a Mil grid testing gunsight for shooting offline. Fly the K4 auto level 290 TA or the Ta152 275 TA due north offline. At those speeds the hollow airscrew shafts are more or less at "0" degree as the real tests were performed. But, your barrel is still tilted up to a convergence 150-650 to intersect with the MG line. I thought becasue in the Ta152 the convergence line from the MG151\20 tilted up to intersect the MK108 line that it was level in the airscrew shaft. It's tilted up slightly as you can see from the offline testing I posted.

If you let both aircraft come to full Militairy speed at 300+ the nose will be down angled nearly enough to counter the up tilting of the MK108 barrel by the convergence code function. Or just about....I found a convergence of 200-250 at full Mil speed generated the closest ballistic trajectory to the "Drop" column in the Brosig data. Kind of a toss up which is better. The Reflexvisier line of sight in the game is wrong if you fly level zero'd. But, due to the down angle of the nose at militairy power it has almost the 14 degree down of -338cm at 400m described in the Bf109G-6/U4 armerors manual.

Pull up the offline target goto full zoom. Shoot at the distances below or inbetween if you want to calculate the angular Mil math for 1Mil@distance. Hold down on the MK108 trigger only long enough to make a good pattern visible with a large dark centering of rounds. You probably noticed the dispersion patterns from my testing are close to the testing from the Rheinmetall-Borsig testing data. Also enable 10x ammo and you might want to set aran time to 01:00 to see your results better. Have fun testing.
--------------------------------------------
1Mil @ 100yds = 3.6 inches
1Mil @ 150yds = 5 inches
1Mil @ 200yds = 7 inches
1Mil @ 300yds = 11 inches
1Mil @ 400yds = 14 inches
1Mil @ 600yds = 20 inches
1Mil @ 1000yds= 36 inches
---------------------------------------------
Rheinmetall-Borsig Testing Data.

MK108 30mm Ballistics

Projectil Type - 3 cm Minengeschoss 108 Ausführung A mit Zerleger
Projectile Weight - 330g +-8
Initial Velocity - 500 m\sec (1640 ft\sec)
Barrel firing Angle - 0 degree
Rate of Right Hand Twist - 1:16

Range(M)..m\sec...ToF......Drop......Disp......RH.Spin.Drift
0...............500........0. ........0..........0......... ....0
50.............486....(.10s)...(-2in).....###.......(1.7in)
100...........472....(.21s)...(-8in).....(6.8ft).....(3.7in)
150...........459....(.31s)...(-1.5ft)...###.......(5.9in)
200...........446....(.42s)...(-2.7ft)...(14.0ft)...(8.4in)
250...........434....(.54s)...(-4.4ft)...###.......(11.0in)
300...........422....(.63s)...(-6.5ft)...(21.9ft)...(1.1ft)
350...........411....(.77s)...(-9.0ft)...###.......(1.3ft)
400...........400....(.90s)...(-12.0ft)..(30.2ft)...(1.6ft)
425.......................... ............................. ....(1.7ft)
450...........390....(1.02s)..(-15.5ft)..###.......######
500...........379....(1.15s)..(-19.6ft)..(39.2ft)...######
525.......................... ............................. .....(2.25ft)
550...........370....(1.29s)..(-24.0ft)..###.......######

[nrshida]

Many thanks. I'll look into it if I can find the time. I made a ballistics table for the Ho-5 once, calibrated in yards. 

[LCADolby]

Did your mother ever call you "her special boy?"

[SunBat]

Wonder what Grizz used to set his convergence to  

I don't think he cared about convergence too much. It was mainly how the shot was set up - something I never could get down real well.  

Concerning the fish pictures, I was just ribbing DrBone some. I apologize before all, for all to see.  I was just messing around. I hope no personal offense was taken by the good doctor.   to him and to all.  He was right to defend Zoney and to call me out.  

[JOACH1M]

Wonder what Grizz used to set his convergence to 

350

[dirtdart]

Bustr, great reads, thank you.  I think I might abandon my new girl, her name is N1K2, and go back to my first love, the K4.  Well, maybe just for a day.  I used to set mine out to 650, under the illusion that it would have the greatest amount of elevation dialed into it, so that when in a flat turn fight, I would have a bit of lead programmed into the round (well when you don't know you don't know). 

Too bad some of these threads get polluted by intramural shenanigans.  You have to sort through 20 post of playground posturing sometimes to get to the relevant stuff. 

[Rash]

ELO wrote a song about her, Evil Women and it goes something a lot like this...you made a fool of me.  Fly it like an angry women, convergence doesn't matter.

[Rash]

I've ran from an angry women, because I didn't know what she was going throw at me next!  Any of the things she was flinging at me could've took me out.  

I found zigzagging kept her guessing.

[RedBull1]

I don't think he cared about convergence too much. It was mainly how the shot was set up - something I never could get down real well.  

Concerning the fish pictures, I was just ribbing DrBone some. I apologize before all, for all to see.  I was just messing around. I hope no personal offense was taken by the good doctor.   to him and to all.  He was right to defend Zoney and to call me out.  

I swear 50% of the crossing shots I miss are because they are in my canopy bar when I need to shoot lol 

[nrshida]

I swear 50% of the crossing shots I miss are because they are in my canopy bar when I need to shoot lol  

That's because you're focused on trying to use your sight or in some way aim. Don't do that, keep your eye on the target (even when it's obscured by the bars), track that and visualise the sight or rather where the round will come out in your head.

For an exercise close your eyes when you fire and you will see it works anyway.