Project Silisko Industries

[Hlynkacg]

I vote Orion or some form of NTR.

 

[Felipi1205]

I vote fot the incredibly awesome!
But another thing: Is this project going to be UMmu and UCGO compatible?

 

[NovaSilisko]

I vote fot the incredibly awesome!
But another thing: Is this project going to be UMmu and UCGO compatible?

UMMU, quite likely. Possibly for UCGO.

 

[Felipi1205]

Nice! :thumbup:

 

[NovaSilisko]

I've been thinking of how the Orion drive will work. What about, "press button, release nuke" for precision control, instead of just "hold button, release constant stream of bombs".

 

[Hlynkacg]

There's a CVEL ORION addon floating around, you could probably use it's code as a base.

 

[NovaSilisko]

There's a CVEL ORION addon floating around, you could probably use it's code as a base.

Nah, I'm going to try to do it from scratch. It -seems- relatively straightforward. Press a key, release an object behind the thing, explode particle effect, apply instantaneous thrust (is it possible to -directly- set a vessel's velocity?)

---------- Post added 01-30-12 at 03:26 AM ---------- Previous post was 01-29-12 at 10:59 PM ----------

Redid the fission fragment vehicle into an orion vehicle. Now, I need some math done...

Let's assume conventional explosives for this proof-of-concept vehicle - 70 kg bombs, with an explosive velocity of 10,000 m/s. Assuming that 45% of the energy is absorbed by the pusher plate, how many newtons of thrust per explosion would it have? I don't want to just pull values out of my ass and then realize they're completely wrong - I'd rather do it right the first time.

 

[Hlynkacg]

is it possible to -directly- set a vessel's velocity?

I believe there is an "apply force" function in the API

 

[NovaSilisko]

I believe there is an "apply force" function in the API

Ah, good. Now it's a matter of actually figuring out that force...

 

[Moach]

hmm, ok lets see....


it could be summed up to a matter of total explosion yield versus the percentage of angular coverage imposed by the shield onto the blast....

as in, your blast radius has a 360º^2 angular fallout range - how much of that is covered by the impact shield?


if you can figure that out, it's just a matter of scaling the yield accordingly


hint - the dot product between two vectors equals the cosine of the smallest angle between them (hinging around the cross vector)

 

[NovaSilisko]

Based on private conversation with moach, I've determined a thrust value of 349.9 kN, based on a roughly 50% coverage area for the blast, and assuming that 70 kg of explosives results in 700,000 kg of force (these numbers provided by moach, yell at him not me)

 

[Hlynkacg]

If you want more data than you'll ever need want to hit the following links. :tiphat:

http://www.projectrho.com/rocket/enginelist.php#id--Orion

http://www.projectrho.com/rocket/supplement/GA-5009vIII.pdf

http://www.up-ship.com/eAPR/ev2n2.htm

 

[NovaSilisko]

Assuming my calculations are right, there's no chance this will work on a small scale. Each blast gives me about 0.2 m/s delta-v...

Scaling it up fully gives more promising results, but I'm not exactly sure I want to make a 4,000 ton behemoth...

Ugh.


If this doesn't work, then I'm going to have to fall back to NERVA. Or, rather, SINTHE (Silisko Industries Nuclear THermal Engine)

 

[Hlynkacg]

If you go the NERVA route, I'll send you my source code. Everything is labeled/commented as I plan to realease a detailed tutorial and SDK samples once it's done.

 

[NovaSilisko]

The more I think about it, the less feasible a mini-orion design becomes. Looks like I'm going with SINTHE after all.

Hlynkacg: Thanks, I'll poke through that. For now I'm just going to input Isp and thrust values, though.

---------- Post added at 07:01 PM ---------- Previous post was at 04:24 PM ----------

How much delta-v is needed for saturn orbit insertion?

 

[Arrowstar]

How much delta-v is needed for saturn orbit insertion?

From where?

 

[NovaSilisko]

From where?

From a hyperbolic trajectory away from earth. Velocity comparable to that of the Voyager probes.



Also, I've come up with a naming system for spacecraft.

[acronym][vehicle number][mission number] [name]

For example: MPOD-V101 Socrates would be Multi-Purpose Omni-Directional Vehicle, vehicle 1, mission 01.

Name categories so far are:

Space stations: Songbirds

MPOD-Vs: Philosophers

Interplanetary Spacecraft: Astronauts and Cosmonauts

Rockets: Mountains, max payload weight determines height of mountain referenced.

 

[Pipcard]

Nice naming system.

So how much payload would "Everest" or even "Olympus Mons" be?

 

[NovaSilisko]

Nice naming system.

So how much payload would "Everest" or even "Olympus Mons" be?

I have yet to determine the payload for it. Right now, it's just a model.

(in b4 it's, like, 5 tons)

 

[Arrowstar]

From a hyperbolic trajectory away from earth. Velocity comparable to that of the Voyager probes.

You could check out the JPL Horizons system and pull of the Voyager data to get an estimate, I suppose. You could also use data stored at JPL's Navigation and Ancillary Information Facility (NAIF) and import it into MATLAB or something like that to obtain the same estimate. That said, if you want an answer on a hunch... 3-5 km/s.