Ohm is Futile

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About Ohm is Futile

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    Spacecraft Engineer

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  1. Ohm is Futile

    Scott Manley reference while loading?

    "Fly safe" is a very common thing to say in Eve online, which Scott has played. Maybe they were thinking of Scott when they put that in, but it's largely used by certain communities, which do not include our good friend Scott Manley.
  2. Ohm is Futile

    Parachute-only Duna landing

    This. Very much this. Also very much this. Note that parachutes will gain effectiveness if you have an engineer to repack them and attempt multiple landings with the same lander. For a single landing and then back to Kerbin, a couple of drogues can help a lot (depending on mass, ofc) and you should otherwise not worry too much about fuel expenditure for the landing.
  3. Ohm is Futile

    Minimum vertical speed for ascent?

    Good advice. Quick note, you don't need the maneuver node at AP if you have KER. You can have it display that information on the fly with perfect accuracy at all times.
  4. Ohm is Futile

    Low-Tech Aerobraking?

    Aerobraking maneuvers are a difficult balancing act, typically. You want to go low enough to brake within an acceptable time frame (one pass for aerocapture) but not so low you burn up and/or crash. That altitude highly depends on the amount of drag your vehicle can generate and how much heat it can survive. That means you should really be wary of something having a lower max temperature than the rest of your ship and it not being in a service bay or protected somehow. If you plan on aerobraking, part temperature values are always worth looking at. Now, if you don't need a capture on the first pass there is always the option of quicksaving before the maneuver that will set your braking altitude (aka periapsis) and messing around until you get something survivable and simply make multiple passes.
  5. Ohm is Futile

    Minimum vertical speed for ascent?

    I wouldn't bother with the exact numbers. It's not about the speed number or even the attitude at whatever altitude (although that's typically a decent indicator). It's about TWR. Rockets with more or less TWR will want a more or less aggressive gravity turn. Another decent indicator is time to apoapsis. If it's above 1 minute and rising, tilt more until it stabilizes around one minute. Keep that going 'till orbit or until you reach the desired apoapsis and then throttle down until you reach apoapsis and then circularize.
  6. Ohm is Futile

    Low-Tech Aerobraking?

    No. Radiators are not meant to shed heat during atmospheric flight. If you want to aerobrake, use a heat shield, use airbrakes (depending on the context), use wings and control surfaces with sufficient heat tolerance, but do not use radiators.
  7. Well, there is a somewhat universal solution if you really want to go wheel. Depending on the size of the vehicle, it could be anywhere from crazy impractical to pretty trivial. Basically, you could put the smallest thrusters on your vehicle facing downwards and then muck around with thrust limits and throttle to see how much you need to stay on the ground... It shouldn't be too expensive in terms of fuel, at least for the very short trips you would be doing. That said, Gilly is probably just too small to apply even this. RCS and other lightweight solutions should be fine and probably more desirable. Heck, you could probably cut the middle man and just straight up dock the hauler with the mining rig since the gravity is so low.
  8. Ohm is Futile

    Can't gather data near Mun

    I just realized this but how many relays do you have? is it possible the relay itself is losing sight with the KSC? Because I ran the numbers in Poodmund's signal calculator and as long as all the antennae are deployed and one of the satellite has KSC connection, then you should at least have a red bar if not two orange ones. It definitely should not be completely disconnected.
  9. Ohm is Futile

    Equations needed

    Not a bad guide, although it's pretty technical and the pictures are broken. I would think some googling should actually yield the answers. I'm sure some of my more technical fellows can answer in more detail, as for me, I can tell you you don't need those to go anywhere in the stock game. In fact, you may very well manage to do pretty much anything in the game without being aware of all the math involved. Blasphemy, I know.
  10. Ohm is Futile

    Duna Mission: What's it take?

    Well, Duna is close enough that you can pretty much throw something together as long as you respect some rules of thumb to make it strong enough. It will be over-engineered and more expensive than it needs, but it will do the job. That said, I am a sucker for tools such as dV calculators and launch window planners. Basically, anything that takes the guesswork out of the equation and I wouldn't say it's perfect for new players, but it can take a lot of frustration out of the process especially with interplanetary trips as those involve a lot more time both designing and flying. It also makes it easy to underestimate interplanetary trips as all the numbers those tools put out are the most efficient ones and most people including myself end up wasting a certain amount of fuel to a number of factors. Then again, at least you get a ballpark idea of what your rockets can do. So, it's up to you really.
  11. Ohm is Futile

    Diagnosing my Satellite?

    PS4 version might be different enough. I just don't know at this point. From my test, this is not what happens, at least not with the original design. It was not perfectly stable, but it did not behave like something that wants to flip either. I was pretty sloppy and ended pointing the rocket well away from prograde in the lower atmosphere. I've wrestled a top-draggy design recently, and believe me, this one may not be perfect, but it actually wobbled back and forth because it wants to fly prograde much harder than it needs for a good gravity turn. Something flip-inclined would try to move away from prograde the moment you push it slightly over the edge. I pushed it well over 20 degrees out of prograde. So at this point, either my replica was not close enough (but I doubt that, as much as I dislike the winglets, they do provide a lot of drag at the bottom and can help prevent flipping) or the PS4 version is different in how in handles aerodynamics. Failing that, I'm guessing there's something the user may be doing during ascent that somehow breaks this rocket. Without more information, I really couldn't tell.
  12. Ohm is Futile

    Can't gather data near Mun

    Yeah, only thing I can think of is that the HGs are not extended... Also, do you have any mods that could affect the strength of antennae? What about the difficulty settings?
  13. Ohm is Futile

    Diagnosing my Satellite?

    Ok, so I made this. It looks pretty much the same, it has a different value by 60 moneys, but as far as I can tell, the thing is otherwise a perfect replica from the OP. I got this into a 250km by 250km orbit with my eyes closed with 2,800 m/s dV left in the tanks. I ditched the middle stage a fair bit earlier due to the lack of torque because of the reliants, I would probably have significantly more fuel left if I used swivels. As I expected, the winglets prevented me from making a really nice gravity turn, which is why the orbit is so high. It flew a bit weird, but even with sloppy controls, it didn't flip. At this point, I have to ask exactly how is the OP trying to get this thing into orbit? It seems like it's more of a pilot problem than a design one...
  14. Ohm is Futile

    Diagnosing my Satellite?

    Hmm, food for thought... I mean, you are not talking about the winglets which were there initially (which I believe do more harm than good) which should counteract a significant amount of torque. At this point I'd be curious to recreate the rocket with and without the winglets and actually test the thing, because in my experience this rocket doesn't look too crazy in terms of top drag.
  15. Ohm is Futile

    Diagnosing my Satellite?

    I tend to agree with that, but who knows? It depends on the target orbit for the satellite and a bunch of other factors. I strongly doubt that there is more drag at the front of the rocket, unless the service bay doors are open during the lower atmosphere part of the flight. If the doors are closed, there's no way the drag is higher at the top than the bottom with those winglets (not that I think they should be there, but that's another debate). The doors are closed during launch, right? Not a bad idea to incline the rocket on the launch pad, especially with the clamps. It's possible the OP is simply being too agressive with the gravity turn, though. You should never get far(or leave the edge of the circle even) from the prograde marker even with a stable rocket during the lower part of the ascent (<30km altitude).