# silent_prtoagonist

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1. ## Ability to remap controls in game

Just came here to second the notion of making the current control settings available in game, as it stands the process of getting a joystick set up just so is rather frustrating.
2. ## How do you plan your dV for your return trip (without the maths)?

Reading the delta-v maps backwards works just fine. Just remember that those maps are only approximate and very optimistic. I usually figure on adding 50% to whatever number they give you for a relatively low-stress flight.
3. ## Unit of "ElectricCharge"

I like to think of 1 unit of "electric charge" as being equal to 1 MJ, based on the ion thruster. The PB-ION produces 500 N of thrust with an exhaust velocity of 41,202 m/s (insert rant about the units of Isp here), and draws 14.548 ec/s (according to the wiki). Thrust power for a reaction engine is: thrust power = 1/2*thrust*exhaust velocity = 0.5*500N*41202m/s = 10.3E6 W Assuming it's drawing 14.548E6 W of electrical power, this corresponds to an efficiency of 10.3/14.548 = 70.8%, which seems reasonable. Interestingly, 1 MJ is also equal to about 240 food calories. Thus, in order to reduce confusion about charge vs. power, I hereby recommend rebranding the unit of electrical power in KSP as "snacks."
4. ## Ideal Ascent Profile

My standard ascent profile is pitching over 15 degrees every 7500 m, putting you level to the horizon at 45 km. It seems to work pretty reliably for most designs, although occasionally I'll modify it to 15 degrees every 6000 or 10,000 m, for unusually high- or low-thrust designs, respectively.
5. ## Show off your awesome KSP Pictures

Aha. I've been using protractor for a couple of days, but I never noticed that before. Thanks.
6. ## Show off your awesome KSP Pictures

What's the little calculator icon in the bottom left of your image?

8. ## What do you think about new nuclear engine?

I love them, swapping out the transfer stage engines on my 0.16 interplanetary designs makes them ridiculously over-powered. Burn times can be a bit...tedious, but it's a small price to pay. An interesting point, a combination of a 1 kerbal pod and 1 meter half-tank has almost exactly the same dv with a nuke or a small lander engine. The extra weight of the nuke almost completely offsets the extra efficiency.
9. ## Kerbal Space Program Trajectory Optimization Tool

Yep, that fixed it, working great for me
10. ## Kerbal Space Program Trajectory Optimization Tool

Yea, I'm on Win7 64-bit
11. ## Kerbal Space Program Trajectory Optimization Tool

I'm getting an error that says "Unable to load JavaFX runtime" when I run the .jar. This happens with both version 0.1 and 0.2. I'm running Java 7 Update 7 (7.0.70) 32 bit on Windows 7 Pro x64. I also ran into this problem running 64 bit java.
12. ## [Stock 0.16] The Eve Project =Guard13007 Industries=

Np, it's good practice for my much neglected math skills over the summer Probably the simplest, albeit labor intensive, way to simulate the drag is go in and multiply the drag values on all the parts by 5...
13. ## [Stock 0.16] The Eve Project =Guard13007 Industries=

Haha that's an awesome idea, lob yourself out of the atmosphere on a sub-orbital capsule and then make up the rest with EVA, very kerbal I tried getting a kerbal into orbit from the surface of Mun once, and he fell just a few m/s short of reaching orbit, so they have at least 550m/s dV, and maybe up to 700 or so (I'm not sure how much I lost to gravity drag). Keep in mind though that you'll need a little in reserve. Even if, once you get him in orbit, the kerbal is the passive member in the rendezvous, he'll still need a little to reach the hatch. Trying to maneuver the ship that close and then switching sounds like somewhere between maddeningly difficult and impossible. Hmm...I feel a challenge coming on

Here's an interesting thought. What if, just for lols, Jool had the same diameter and mass as Earth? I think it would be in about the right ballpark to be in scale with the rest of the Kerbol system: Kerbin is ~1/10 the size and ~1/100 the mass of Earth, and Earth is ~1/10 the size and ~1/300 the mass of Jupiter. And it would make a fun easter egg for people who looked closely at the numbers...
15. ## [Stock 0.16] The Eve Project =Guard13007 Industries=

Ok, some back-of-the-envelope calculations: Kerbin properties: surface gravity: 9.807m/s^2 GM: 3530 km^3/s^2 radius: 600 km Eve properties: surface gravity: 9.807*1.7m/s^2 = 16.66m/s^2 radius: 700km. assume a 200km orbit to be safely above the atmosphere Law of Gravity: g = GM/r^2 => GM = g*r^2 = (16.66E-3km/s^2)*(700km)^2= 8164 km^3/s^2 for Eve (as a side note, this means Eve has a mass = 1.223E23 kg, about 2.3x Kerbin) Circular orbital velocity: g = v^2/r => v = sqrt(g*r) = sqrt(GM/r) => At surface: v_700 = sqrt[(8164 km^3/s^2) / (700km) ] = 3415 m/s At 200km altitude v_900 = sqrt[(8164 km^3/s^2) / (900km) ] = 3011 m/s Gravity drag: Find an altitude above Kerbin equivalent to 200km above Eve; reaching this altitude should incur the same gravity losses in either case. specific energy change to go from Eve surface to 200km: dE = GM/r2-GM/r1 = (8164 km^3/s^2)/(900km) - (8164 km^3/s^2)/(700km) = -2.592 km^2/s^2 equivalent altitude above Kerbin: r2 = GM/(GM/r1+dE) = (3530 km^3/s^2) / ((3530 km^3/s^2)/600km - 2.592 km^2/s^2) = 1073 km Air drag: This is a bit trickier. Drag force scales linearly with density, but I'm not sure how that translates into drag losses. Maybe the best way to deal with this is to modify a small part (maybe a parachute) to add the appropriate extra drag for each design. Oi, that was more complicated than I thought. I'm doing all of this off the top of my head, so feel free to check my numbers, but these seem about right. So in total, a normal rocket that can launch from Kerbin and reach a speed of ~3000 m/s at an altitude of ~1000km (which would put it in an escape trajectory and then some) should be able to reach low Evonian orbit, not accounding for drag...

Either way I'll be happy. The other three planets look great, more than enough to keep me occupied. I'm happy to wait for Moho to be done right if that's what the devs decide to do.
17. ## Efficient Flight Plan For Space Planes?

Here's and old design of mine, pretty gentle to fly and plenty of fuel margin. http://kerbalspaceprogram.com/forum/showthread.php/11214-The-K-Prize-100-reusable-spaceplane-to-orbit-and-back?p=168116&viewfull=1#post168116
18. ## Specific impulse?

Another way of looking at it, specific impulse is the amount of time, in seconds, that an engine producing 1 kgf (kilogram of force) would take to burn 1 kg of fuel.
19. ## Efficient Flight Plan For Space Planes?

I've found that the most efficient trajectories are almost the same as the ones I use for rockets. For instance, try pitching up to 60 degrees as soon as you've cleared the runway, then slowly pitch down as you ascend, aiming to be at 45 degrees at 15km altitude. Turn on your rockets at ~12 km, turn off your jets at about 15 km. After that, just keep pitching down, aiming for 30 degrees at 30 km, and level at 45 km, then keep accelerating until your apoapsis as where you want it, coast and circularize. Also, don't try those super tiny designs at first. I find a reasonable one-kerbal design to reach orbit without too much difficulty usually has about 5 standard tanks of fuel (2000L), to give you an idea of what ballpark you should be in. Once you've figured out how to get that into orbit, start optimizing your ascent, and shaving off fuel until you've worked it down to super-tiny.

I've actually found that it's not too hard to do them in the Mun-Minmus system, as long as you're not terribly picky about where you go or when. The longer times involved with interplanetary flight would make this method tedious, though. There are a few tricks that should be fairly easy to eyeball, though. For instance resonant encounters (where you hit the same planet multiple times in a row, ala the vidoes that LukeTim posted) should be fairly straight forward. Just eject into an orbit who's period is a nice multiple of the planets--2x, 1.5x, 2/3x, etc--coast out the the opposite apsis, and adjust your orbit to make sure you're at another nice multiple for the next time around.
21. ## Lagrange points?

Lagrange points are really outside the scope of KSP. But if you're really ready to start talking about building lagrange point space stations, then you're probably ready to make the jump to Orbiter. It has pseudo-n-body physics, which accurately simulate lagrange points, in addition to allowing other interesting things like sun-synchronous orbits and solar sails. It also, given that it has docking support, is currently a much better simulator for building space stations to begin with (at least until docking makes it into KSP). There are also numerous full n-body simulators out there that are fun to play around with. Universe Sandbox (which is pretty, but costs money) and Gravity Simulator (which is ugly but free) come to mind... EDIT: In retrospect that really sounded like an add...I promise I don't work for Martin Schweiger
22. ## I have a kerbal down, on the moon.

I've had similar troubles with kerbals not being able to get up when the fall while standing on a part, but quitting and reloading the game usually fixes it...
23. ## Space-themed TV shows (that care a little about realism)?

Artificial gravity (other than by acceleration) is about as impossible as ftl, which is to say there a few oddball theories that explain ways in which it might be done without completely throwing the laws of motion, thermodynamics, etc out the window, but they either require new physics or are simply many orders of magnitude beyond our current technical ability. If you want to include them in your sci-fi that's fine, but most authors/writers don't bother to explore the consequences of these technologies. For example, if the civilizations in Star Trek can routinely convert matter to energy and back again (transporters and replicators) why do they bother with the obvious safety hazards of powering their ships with antimatter? That's not to say that shows like Star Trek are bad shows (I'm a trekkie through and through), but I tend to find stories that at least acknowledge the presence of reality (such as the one scene in the new Star Trek movie with no sound in space...it's a step in the right direction at least) more rewarding that those that don't. Btw, a great website on the topic of realistic sci-fi that y'all should look at if you haven't already: http://www.projectrho.com/public_html/rocket/index.php
24. ## Space-themed TV shows (that care a little about realism)?

**spoiler warning** As has been mentioned, Firefly has no ftl, everything happens at sublight (albeit probably very high, by modern standards) speeds, so relativistic effects don't apply. I also have to give Firefly props for having no sound in space, and requiring ships to rurn around to slow down/change direction. It even has reentry heating Where Firefly gets it wrong is anti-gravity, propulsion systems that are "optimistically efficient" at best, and the general "space is bigger than you think" problem, among others. However, I usually tend to forgive live action tv shows for having artificial gravity, since most don't have anywhere near the budget necessary to make every single interior shot an effects shot, just to make the characters float (but props to Babylon 5 for doing AG right). As for the propulsion systems, the "firefly drive" is apparently ridiculously efficient, since Serenity isn't a flying gas tank...even assuming that 500 years in the future, we are capable of building such a drive that doesn't instantly vaporize itself with waste heat, you still have to deal with the problem of thousands of private ships flying around with weapons of mass destruction on their tails (but at least the show does acknowledge this in the pilot ) Finally, there are a couple of occasions in the show when the writers forget just how big and empty space really is...most notable in the pilot when the ship "just happens" to have a close call with a Reaver ship. The chances of such a close encounter happening by chance in interplanetary space, or even cis-lunar space, without one or both parties trying specifically to make the rendezvous, are astronomically low (literally)...
25. ## The Little used Polar Orbit

I put a couple muon detectors in polar orbit back during my quest to find all of the monoliths. Basically they're useful anytime you want your satellite to pass over every point on Kerbin...mapping, communications, etc.
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