why there is brown smokes?

That's a Titan II. "Blown" out of it's silo with motors ignited a split second later. You can see it come to almost a full stop before the engines ignite. The "smoke" seems to be correlated with the ignition of the engines, so I'd bet it's either a fuel, or oxidizer vent valve slamming shut right after the tanks were pressurized.

That's my take, at least. Very cool clip though!

tah

OK, it's *not* a Titan. Shoulda read the PDF first. SS-18.

From:

"The R-36M used a gas-dynamic method for the first and second stages whereby special ports are opened through which the propellant tanks are pressurized. This obviated the need for the use of pressurant gases from tanks and the so-called chemical tanks pressurization (by injecting small amounts of fuel in the oxidizer tank and oxidizer into the fuel tank). The improved design and more effective engines allowed an increase in the total liftoff weight from 183 tons to 209.6 ton and the throw weight from 5.8 tons to 8.8 tons, while maintaining the overall dimensions of its predecessor missile.

The SS-18 was deployed in modified SS-9 silos, and employed a cold-launch technique with the missile being ejected from the silo prior to main engine ignition. The rocket was placed in a transport-launch canister made of fiberglass composites. The container was placed into an adapted R-36 silo. The specially hardened silo was

39 meters deep and had a diameter of 5.9 m. Prior to main engine ignition the missile was ejected from the container with the help of a solid-propellant gas generator located in the lower unit of the transport-launch canister."

Neato!

tah

Close but no cigar.

The US Titan II was never, ever launched that way. Nor does it look like a Titan. It does look like a military missile launched from a military silo. So my guess is that this is a product of the former USSR.

Being a military missile it probably (almost certainly) uses storable propellants. Most like fuel choice being one of the hydrazines. Since engine start is usually fuel rich, you get the excess hydrazine reacting with water vapor in the air. Thus the dark cloud.

Oh wait a minute, there is an article on the same web page. You don't suppose it says anything in there?

SS-18 A USSR ICBM.

Checking other sources reveals that it uses dinitrogen tetroxide for oxidizer and UDMH (unsymmetrical dimethyl hydrazine) for fuel.

snipped-for-privacy@we> >

Sounds like a piston launcher.

Titan missiles are not launched that way. They are ignited in the silo and flown out.

Mario Perdue NAR #22012 Sr. L2 for email drop the planet

"X-ray-Delta-One, this is Mission Control, two-one-five-six, transmission concluded."

Oops, that should be "oxidizer rich", "nitrogen tetroxide", etc.

Humm, the rocket was helped with a PAD !