SAM Simulator, SA-75M Dvina (SA-2B/F) work in progress pictures.

Dvina specialties...

- 34km maximum range is only 60% of the Volhov 55km.
No passive flight phase of the missile, due to three component liquid engine.

- Note the 4.2 degree line.

- Instead of using the I87V, you can calculate the jamming target distance with the table.



- Note the three horn SNR azimuth direction pointer.

I used to prefer to load this entire thread as one page, but now I can't do that because it is so darn long my ancient computer runs out of RAM trying to load it.

"No passive flight phase of the missile, due to three component liquid engine."

What do you mean, Hpasp? Does the missile go out of control as soon as the fuel runs out?
And what is 'three component' and what (technical) difference versus Volkhov does it make?

Beside the two nasty material, used by the Volhov missile...

AK-20K “Melanj” oxidizer (“O” substance) tank.
Weight / Composition: 550kg / Nitric Tetroxide in solution with Nitric Acid, with Phosphoric and Fluoric acid inhibitors.
20±2,5% N2O4, 73,4% HNO3, 1-1,25% H3PO4, 0,5% HF, 2±0,8% H2O
Orange-brown, evaporating liquid. Self ignites combustibles. Highly corrosive, only few materials can withstand its effect: chromium steel, pure aluminum, glass, and for a short period, some rubber mixes.

TG-02 “Samine” fuel (“G” substance) tank.
Weight / Composition: 250kg / mixture of xilidine, and triethylamine.
50% C8H11N, 50% C6H15N
Oily liquid, with color from yellow to dark-brown, and an odor typical for for satured animes.
Strong nerve agent, fatal concentration in air is: 18mg/liter!

... the Dvina missiles used a third one also...

OT-155 "Isopropyl nitrate" monocomponent fuel ("I" substance)
... as nasty as the other two.

Be careful, everybody! Can be found in your diesel fuel

wikipedia - Isopropyl nitrate

And not everyone knows it is nasty

I swallowed isopropyl nitrate...

Interestingly, there are also voices recommending milk as an antidotum. I wonder, was there a milk tank in Dvina batteries? It must have been a challenge to store milk in tropical conditions of North Vietnam (I mean, effective cooling system, hygiene, etc., and last but not least, supplies - I think Melange and Tonka were easier to get than milk in Vietnam at that time )

But jokes aside, can you imagine problems those guys had to overcome to do maintenance and fueling of the missiles in so harsh a field conditions? Fatal accidents must have not been uncommon... Not mentioning the condition of Vietnamese environment (I don't believe that in wartime every drop of "nasty stuff" was deactivated - it usually got a great deal of time and nerves during peacetime).

Anyway, looking forward to fire a Dvina. I can see a lot of progress.

Did you notice anything special in this panel?

Most of switch names is in English, and some reflect English terminology, e.g. Line-of-Sight (LOS) or Continuous-Line-of-Sight (CLOS) is English name for 3-point guidance method. Why?

need some paint ???

Boy, wish this could be included in FSX with the VRS SB and TACPAC!!!

I hereby propose to ban any aviator-minded statments. Our community stands firm on the ground!