Project Atlas ICBM development

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, a while back, you said 2 versions of the ICBM. What did you mean by that?

 

[MJR]

One with different textures. BTW, I added the vernier rockets. I am updating it in a minute.

---------- Post added at 11:48 AM ---------- Previous post was at 11:42 AM ----------

Another question. Did the vernier rockets produce smoke?

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, to my knowledge (and the thoudands of early Atlas launches I've seen on video !) the verniers did not produce any kind of smoke.

 

[MJR]

Alright. That means I got to make the verniers as booster and then make it to where it only has engine exhaust. This might take a bit.

---------- Post added at 11:57 AM ---------- Previous post was at 11:55 AM ----------

Give me all the information you can dig up on the verniers please.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, here are some links to vernier engines:

http://www.diracdelta.co.uk/science/source/v/e/vernier engine/source.html

http://en.wikipedia.org/wiki/Vernier_thruster

http://exploration.grc.nasa.gov/education/rocket/rktcontrl.html

http://www.thefreedictionary.com/vernier+rocket

http://www.daviddarling.info/encyclopedia/V/vernier_rocket.html

The Internet is so darn easy :lol:!

 

[MJR]

What I meant was the thrust in newtons, diamter, weight, height, and etc.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, this is the best info I could find

"An LR101-NA Vernier rocket engine assemblage manufactured by ROCKETDYNE Corporation for installation onboard an Atlas SM-65 ICBM (Atlas “A”/XLR 89 NA-1). These engines were employed in various configurations to provide attitude (roll, pitch and yaw) control onboard the Mercury-Atlas, Atlas, Thor ICBM, Delta propulsion systems. A fixed-thrust, single-start, liquid bipropellant engine producing of maximum of 1000 pounds of thrust (nominal seal level), the engine design allows postoperative purging, regenerative cooling, thrust chamber gimbaling, and full-thrust runs of 325 seconds duration. It has a dry weight of 54 pounds and measures approx 28 x 27 ¼ x 20 inches (normal gimbaling arcs included). Designed propellant mixture is combination RP1 (highly refined liquid Kerosene) and LOX (liquid oxygen).

The engine consists of a thrust chamber assembly (a steel double-walled structure with a copper spiral regenerative cooling coils between the inner and outer walls), a pneumatically operated propellant valve with a valve position-indicating switch, an electrically fired igniter assembly, a pneumatically controlled oxidizer bleed valve, a fuel manifold pressure switch, a manifold gimbal assembly, propellant orifices, and pneumatic purge check valves. These components along with interconnecting electrical cabling and tubing assemblies are fixed in position on a welded tubular engine mount.

Gimbaling is facilitated via a pitch gimbal shaft, which provides for movement of the thrust chamber through a pitch-roll correct arc of 70 degrees on either side of the neutral position; and a yaw gimbal shaft which permits movement of the vernier thrust chamber through a yaw correction arc of 30 degrees (outboard) and 20 degrees (inboard) of the neutral position. In addition to performing the thrust direction gimbal function, the yaw shaft serves as a manifold for passage of fuel and oxidizer to the thrust chamber."

Here is also a picture:



I'm not sure where to find other info or whether the numbers are in the customary or metric. I hope this is enough in fo for you to use.

 

[MJR]

The offset coordinates are way off for the rocket and I am confused because there is two boosters and only one offset coordinate.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, I'm not sure I know what you mean.

 

[MJR]

In the ini file for the booster, you put how many boosters you have. In this case N=2. That says that there are 2 booster, but there is only one off=(x,x,x) coordinate for the boosters so it only defines one. Without figuring this out the verniers will have smoke which is unrealistic.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, I think I know what you mean. I would try making one of the coordinates negative. If that particular coordinate doens't work, make it positve and try the next one. Personally, I have had good results with this method.

 

[MJR]

With two engines?

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, I would try it with only one engine.

 

[MJR]

I positoned the verniers in the right place, all I need to do is add the exhaust.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, I am glad to hear the good news with the verniers. Did my idea work?

 

[MJR]

I haven't had any luck with the exhaust though.

---------- Post added at 01:43 PM ---------- Previous post was at 01:35 PM ----------

I got it! :speakcool:

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, I'm not sure why you are having trouble. I saw another Atlas add on (I believe it was Ranger) and it had verniers, but the wrong exhaust.

 

[MJR]

The second vernier isn't translating, but I'll fix it.

 

[Star Voyager]

Good morning gentlemen,
For Mr. MJR, is there any chance we can add this to the Project Mercury?

 

[MJR]

If the first publisher wants to make it a package. Sure. Let me figure out how to move the second vernier because the coordinates are not having any affect on it then I will find small problems and fix those.