VFB1210

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About VFB1210

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    Rocketeer
  1. For what it's worth, I've been using Rescale! 3.2x with the latest version of Sigma Dimensions, and it seems to work just fine. I can't confirm that it's 100% bug free, but I haven't noticed anything catastrophic.
  2. The thing is that this mod doesn't use Texture Replacer, it uses Texture Replacer Replaced, which is not yet updated.
  3. Yes, god forbid Squad update their game and fix things and add features. How horrible. /s Also, anything that worked with 1.4.1 and 1.4.2 has a very high likelihood of working with 1.4.3 anyway. And it appears that this mod doesn't work with 1.4.anything at the moment, so it's a moot point to post here. Anyway, @StarCrusher96, the mod looks amazing, and I am eagerly looking forward to the next release so I can roll it into my 1.4 install!
  4. I've had this idea rolling around in my head for a bit now. Is it possible for EEX to change the rotation and offset snapping when using the gizmos? I think that would be a fantastic feature that will add a lot more to this amazing mod.
  5. I too am having issues with Scatterer and 64k. Installing Scatterer normally makes Kerbin look like this in map view. When I use the RSS fix config, Kerbin looks normal in map view, but lacks the Scatterer effects in the normal flight screen. Any idea how to fix this?
  6. 1. Lovell did have engine gimballing and RCS capabilities when performing that burn. If he had neither of those the situation would have been literally hopeless because there would be no way to orient the craft to make any burns whatsoever. There is in fact video of the burn (I'm trying to find it now.) where you can see the Earth bob in and out of view during the burn. 2. The Vostok 1 capsule didn't blow up-where did you even hear that? And think about it: what combustibles would have even been there to allow it to? Astronauts parachuted out of Vostok capsules because the parachutes on the capsules weren't large enough to slow it down enough for a human-survivable landing. So the astronauts would jump out and parachute to safety while the capsule would slam into the ground. And survive remarkably in tact..
  7. I'm dumb and I've been over complicating everything this whole time. Also, this wikipedia article is a thing. The v in v(dm/dt) is supposed to be the exhaust velocity. Exhaust velocity multiplied by mass flow rate also has its own name: THRUST. So according to the article, we get ΣF + thrust = ma. ΣF is all of the external forces. Gravity. Drag. Lift. So: Gravity + Drag + Lift + Thrust = ma. TDW was literally right THE ENTIRE TIME. My apologies for misleading everyone. Let this be a lesson: don't blindly apply formulas without thinking about them, and don't ever be too proud to look something up.
  8. It should be taken into account whenever you are calculating the net force on the vessel. But the v(dm/dt) term only emerges when you are burning because dm/dt is zero when you aren't.
  9. dm/dt is a scalar value, a regular number, not a vector. It can't be parallel or orthogonal to v.
  10. Quigon-integrating the flow rate leads to a lighter vessel because integration is actually the opposite of differentiation. When you integrate the mass flow rate, you go from knowing how fast you're throwing mass away to finding out how much you've thrown away. And of course, once you've thrown away some of your rocket's mass, it is going to be lighter. And the constant g has to do with the fact that is just a conversion factor, and in this case has nothing to do with the actual strength of the gravitational field. At some point, someone needed to dividentify by an arbitrary value with units [l]/[t]^2, and they said "I'm just going to use g, because everyone agrees that that is 9.80665m/s^2, or 32.174ft/s^2, or whatever it is in whatever units they want to use. They all know what it is, and there will be no confusion when calculating."
  11. To be truthful, even I have a difficult time wrapping my mind around how (dm/dt)v actually plays into the equation, but the math doesn't lie, and the math that derives it is very simple, and makes it plain that it cannot be ignored. (Provided you know Calculus, that is.) But physically, it is pretty unintuitive. (Again, as in my last post, bolded values are vectors. Just for bookkeeping and clarity.) So, to start off, we have commonly taught version of Newton's 2nd law: ΣF = ma. This is read as "The sum of all external forces on an object (ΣF) is equal to the mass of the object multiplied by the rate at which it accelerates." As I said in a previous post, this is not 100% true in every possible situation, but it works in the case of a constant mass. (In fact, as you'll see later, it actually IS this in the case of constant mass. The general case will simplify down to this.) However, to get the whole story, you need the equation ΣF=dp/dt. This is read as "The sum of all external forces on an object is equal to the time derivative of its momentum." Now, I'm sure you know what momentum is, it is mass multiplied by velocity! Or mv. But, what the heck does "time derivative" mean? Well, in calculus, there are three big concepts: limits, derivatives, and integrals. Limits hare extremely useful tools, but they're not relevant here. All you need to know about them for now is that they are used in the construction of the next two tools we gain from calculus: derivatives and integrals. Integrals are also extremely useful, but also very confusing, and not needed here, so we will throw them out for now too. That leaves us with derivatives, which is the relevant topic. A derivative, in short, is the rate of change of something. It can be the same everywhere (as is the case in a linear function), it can change smoothly according to its own function (as with any polynomial that isn't a linear function), or it can even jump around pretty wildly in some weird cases. But, for any function which has a derivative, the derivative will tell you how fast that function is changing at any point you want! (Well, not any point you want, there are some rules. But they're not relevant to us here.) That is what a derivative is, it is a function that tells you how fast another function is changing at any point you need to know. In the case of a time derivative, we are concerned with how our function changes as time changes. You can take a functions derivative with respect to any variable you want, but time is the one we are looking for here. Whenever you see something like dm/dt, that is what it means. You want to know how the top variable (m, in our case) changes as the bottom variable (t) changes. Don't worry about the d's, those are just part of the notation. So, for the sake of brevity, we are going to skip a lot of steps here, stuff like calculating derivatives by hand, and go right to the shortcuts! As it turns out, derivatives of certain types of functions always follow the same rules, and instead of doing everything out the long way, you can use these rules to calculate your derivative much quicker. The rule we are interested in is called The Product Rule. The product rule says that whenever you have a function (which we will call h(t)) that is equal to two other functions multiplied by each other, (e.g. h(t) = f(t)*g(t)) the derivative of h(t) is equal to the derivative of the first function, multiplied by the second function, plus the first function multiplied by the derivative of the second function. (dh/dt = df/dt * g(t) + f(t) * dg/dt) Now that we have our rule, let's see how it applies to what we were talking about: we know that ΣF = dp/dt. And we know that p = mv. And we know how to take the derivative of two things multiplied together, so let's do that! Our result ends up being dp/dt = (dm/dt) * v + m * (dv/dt). Now, it just so happens that dv/dt (the rate of change of velocity as time changes) has its own name: acceleration. It also has its own symbol: a. So we'll plug a in for dv/dt so things get less cluttered. Now we have ΣF = dp/dt = (dm/dt) * v + ma. This is the general form of Newton's 2nd law. But, most of the time when you're using it, the mass of the thing your using it on (such as a billiard ball, to pull an example out of a hat) doesn't change at all. Ever. Period. In this case, dm/dt (the rate of change of mass as time changes) is 0. Everywhere. Always. So, if we plug that in, we get ΣF = dp/dt = 0 * v + ma = ma. In this case, the bit with dm/dt goes away, and the law simplifies down to what you were taught in school. But, in our case, we have rockets that do little else but throw their mass away really fast so they can get to space. (Or the ground 100 feet from the launch pad.) In this case, our mass is always changing, so dm/dt is never zero, and so that part of the equation never goes away, and so we can't pretend it doesn't exist, we have to take it into account. That's the math, and the math doesn't lie. TL;DR: I don't understand it either, but the math says it has to be there, and the math doesn't lie. Also, unfortunately I haven't had much time to play with KSP and experiment with this, as much as it's been gnawing at me. So I have no data to report.
  12. I've seen other people do it, (e.g. F9 flyback booster) but I could never get it to work, and the ship has to be within physics range. So an ore ship to Minmus would probably be out of the qurstion.
  13. If you are flying level at a constant speed, the net force on the plane should be zero, and drag should be equal to thrust. That makes sense. Similarly, thrust will be greater than drag when speeding up, and less than drag when slowing down.
  14. How strange. I'll have to look over the math once again and do a couple of test flights once I get home from work. Also, if I'm not mistaken, the ship:acceleration tag is actually a thing in kOS, so you should be able to use that rather than relying on an accelerometer. Edit: A very preliminary guess without having the chance to look anything over would be that there may be a unit mismatch somewhere, an overlooked conversion factor or something.
  15. What exactly are odd results? I haven't had a chance to play with either of our scripts myself.