Project Silisko Industries

[NovaSilisko]

Thanks, arrow. I'll look around it, and in the mean time will be learning IMFD.

Here's the SINTHE test vehicle in lunar orbit (model is that of the Valentina Tereshkova Venus probe, the first operational vehicle using SINTHE)

 

[Mattyv]

What exactly is SINTHE?

 

[NovaSilisko]

What exactly is SINTHE?

I explained it a few posts back, it's an acronym for Silisko Industries Nuclear THermal Engine.

---------- Post added at 10:17 PM ---------- Previous post was at 09:28 PM ----------

Turns out I grossly overestimated the amount of fuel. Time to expand the tanks!

---------- Post added 02-01-12 at 03:49 AM ---------- Previous post was 01-31-12 at 10:17 PM ----------

According to wikipedia:

Other propellants are sometimes proposed, such as ammonia, water or LOX. Although these propellants would provide reduced exhaust velocity, their greater availability can reduce payload costs by a very large factor where the mission delta-v is not too high

Just how much does it reduce exhaust velocity? Because I sure could do a lot with a storable-propellant nuclear engine.

 

[Mojave]

Your addons are good Silisko :thumbup:

 

[Mattyv]

Remove

 

[Izack]

Just how much does it reduce exhaust velocity? Because I sure could do a lot with a storable-propellant nuclear engine.

Check this out:
http://www.projectrho.com/rocket/enginelist.php#id--The_Drive_Table

The NTR-SOLID entries list the exhaust velocities for several propellants. Unfortunately it doesn't give corresponding thrust values for typical engines.

 

[NovaSilisko]

Check this out:
http://www.projectrho.com/rocket/enginelist.php#id--The_Drive_Table

The NTR-SOLID entries list the exhaust velocities for several propellants. Unfortunately it doesn't give corresponding thrust values for typical engines.

I'm going to go under the assumption that specific impulse is lower, but the thrust remains the same...

 

[silent_protagonist]

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

The most fun (albeit not necessarily the most efficient) way to find out, imho, would be to load up a Delta Glider and try it

I'm going to go under the assumption that specific impulse is lower, but the thrust remains the same...

A pretty good approximation is to assume that power output (Power=Thrust*Exhaust Velocity) remains the same. So thrust would be inversely proportional to Isp.

Can't wait to give these birds (and mountains and persons of note) a try.

 

[NovaSilisko]

Which is more feasible, storing methane cryogenically over long periods, or storing it as a compressed gas?

 

[MaverickSawyer]

Cryo storage is easier. less leakage.

 

[NovaSilisko]

Cryo storage is easier. less leakage.

Over the course of, say... 4.5 years?

 

[MaverickSawyer]

:hmm: that's a bit different. What kind of thermal load are we talking about around the tank(s)? If you can keep them shaded from the sunlight, and isolated from any heat sources aboard the spacecraft, you should be able to minimize boiloff and still be good.

 

[NovaSilisko]

:hmm: that's a bit different. What kind of thermal load are we talking about around the tank(s)? If you can keep them shaded from the sunlight, and isolated from any heat sources aboard the spacecraft, you should be able to minimize boiloff and still be good.

Considering the ship only needs a very small amount left after the main burn, it should be good. I'll just add a cylindrical sunshield around the methane tanks.

 

[MaverickSawyer]

Where are you goping with this ship? If you need to, you can make more methane at your destination, depending on where you go.

 

[NovaSilisko]

Where are you goping with this ship? If you need to, you can make more methane at your destination, depending on where you go.

Trust me, methane at the destination is no problem :tiphat:

 

[Mattyv]

:lol:I think I might possibly know where you might be going

What are you using to model these spacecraft?

 

[NovaSilisko]

I use 3ds max.

 

[Felipi1205]

Titan is the destination?

---------- Post added at 07:15 PM ---------- Previous post was at 07:15 PM ----------

Maybe Neptune or Uranus?

 

[NovaSilisko]

 

[Felipi1205]

WOHOOO!!! I'm right! It's Titan!! I love Titan!

---------- Post added at 07:32 PM ---------- Previous post was at 07:30 PM ----------

Nice diagram! Do you used CorelDraw?