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Found 10 results

1. ## Calculating the Specific Power (W/kg) of Ion Engines

I'm thinking about diving deeper into the ion engines of KSP. Not only can I understand them better for KSP fanworks, in which the engine math would be described in great detail, but I can apply these principles for real-life. As a KSP example, the given values of the IX-6315 "Dawn" engine are: Isp = 4200 s Thrust = 2 kN Which is way higher than the real-life ion engines I've been seeing. Values I can easily calculate are: Mass flow rate for xenon propellant (kg/s) Exhaust velocity (m/s) Beam power (watts) Wet-to-dry mass ratios for certain dV requirements For certain phases, some parts will be jettisoned (e.g. I'm not going to carry an Apollo-style landing craft back home if I've already used it). Using this engine as an example, how do I calculate the specific power (W/kg) for it? With that value, I can divide it by the input power to get the mass of the power supply system required. Example: an engine with an Isp=2000s and a Thrust = 0.2 N. A value of 100 W/kg was given for the specific power, but I have no idea how they got it. mass of power supply system = (Power required in W) / (specific power in W/kg) This might not matter so much in KSP, but it does for real-life calculations. Plus, as an aerospace engineering major, I want to better understand what goes into xenon-powered spacecraft. If someone could help me, that would be nice.
2. ## Best way to power a large amount of ion drives?

It turns out that the large ion array on my WIP Jool5 mothership needs an obscene amount of power, at least relative to stock KSP. We're looking at 24 Dawns consuming a total of 216ec/s at full tilt. Solar obviously isn't an option because the inverse square law is a thing, and since I'm limited to stock parts I can't just slap on a NearFuture fission reactor and call it a day. Currently, I'm considering clipping a ring of 12 RTGs to each Dawn, which should provide enough power to run them all at max throttle. The problem is that the total mass of all these RTGs will be about 24 tons - not huge relative to the rest of the ship, and the Dawns have the ISP to burn, but every ton counts when your TWR is almost non-existent. The alternative is using fuel cell arrays. Each array can pump out enough juice to run two drives, so only about 3 tons would be added in total. But, they consume LFO, slashing the effective ISP of the Dawns from 4200 to 1300ish, and that's before the TWR impacts of all the fuel I'd have to carry with me. So... I'd like to get y'alls opinion. Which one is the better solution for a large ship? Or is there a third option I haven't even considered?
3. ## Can you make Xenon gas?

I can mine fuel and mono-propellant, but are there anyway I can mine or get Xenon from space? is there any mod? My ion crew transporter is out of Xenon gas and it's suck in kerbol orbit.
4. ## Add Argon as a fuel for ion Engine

The ion engine uses Xenon as a propellant. What changes do I need to make in the cfg file so that the engine could run on either Xenon or Argon?
5. ## Could someone make a high-altitude air-breathing ion engine?

I saw this video by Scott Manley where he went over an ion engine that collects air from the upper atmosphere and uses it as fuel to stay in orbit. I think this could have some rather... interesting uses in KSP. Things such as ICBMs and crafts for traveling to and from a planet's moons. It would also be cool if we could store some of the gas in tanks for use in orbit. Here's the video -
6. ## Ion Engines, Good or Bad?

After recently sending a probe to the Mun, I have came across some issues regarding the Ion Engine, but rather than list everything bad about it, I've decided to turn this into a conversation. What are your pros and cons of the IX-6315 "Dawn"? Please feel free to post your opinions on this topic below! - Mr_Kerbal
7. ## Gamma-C

The Latest Innovation from Mintech, urking out concepts from the raycast saga. I hope you all enjoy. GAMMA-C CRAFT FILE: Destination folder "Kerbal Space Program\saves\yoursavefile\Ships\SPH" Gamma-C Craft File