How can I deal with the "floppiness" of tall rockets?

Mad Scientist
  • How can I deal with the "floppiness" of tall rockets? Mad Scientist

    I just tried to build a rather tall rocket which also uses several Quad-Couplers to add more engines, and as you can see in the screenshot below this thing is rather floppy and unstable:

    enter image description here

    It also doesn't fly far due to these problems. I tried adding struts, but at the critical points between stages I can't seem to add any as the Quad-Couplers are wider than the fuel tanks.

    How can I build tall rockets that don't flop around so much and that are actually spaceworthy? I'm both interested in this specific case, but also on general guidelines for this.

  • This may not be the most aesthetically pleasing solution but this is what i find works best for tall "wobbly" rockets.

    You need to build an external frame around the rocket using struts and i-beams.

    1. add horizontal i-beams at the center of your craft in radial pattern.
    2. next add struts from a lower part of the craft
    3. add struts from the i-beams to the "wobbly" part of your craft (top)

    You can add as many levels of i-beams as you want, but keep in mind that it takes a certain amount of force to break the struts supporting your craft.

    edit: this will not work for the quad-decoupler in the middle of the rocket, as mentioned by @MBraedley. However it works quite well for most excessively tall rockets.

    This answer is for the more general case, however in your case, you cannot improve structural integrity because of the tree topology, as mentioned by @MBraedley.

          /\
         /__\
         |  |
        /|  |\
       / |  | \  <== Struts
      / /____\ \
     /  |    |  \
    ====|    |====  <== I-Beams
     \  |    |  /
      \ |    | /  <== Struts
       \|    |/
        |    |
        |____|
        ||||||
    

  • Don't do this! It's bad, bad, bad!

    Even by adding struts as per @char1es' answer, your rocket still isn't structurally sound. The reason for this, as I've said before in other answers, is that the topology of a KSP rocket is in the form of a tree. This means that only one of the stack decouplers is attached to the bottom quad coupler. The result is that the other three are left "floating", and have no problem clipping through the other parts of the rocket.

    No, what you want to be doing is using a single rocket with similar thrust and specific impulse to the combined 4 rockets. For the second stage, I'd hazard a guess that the skipper is probably what you want, while for the upper stage you probably want an LV-909.

    As an aside, if your rocket can't support its own weight on the launch pad, it's not going to survive launch. If there's significant flex without it even moving, you may have done something evil, and at the very least something immoral. There are usually better approaches than doing stuff that's evil and/or immoral.

  • Where the quad couplers are, I don't think you need those, if you want them you should at struts between the two couplers and some to the rockets.... Suggestion though!

Related questions and answers
  • Possible Duplicate: Is there a limit to how tall my Tower can be? I have 165 floors in Tiny Tower and would like to know what the maximum is?

  • On Minecraft, XBox 360 Edition, I have a 40x40 block area that I plan to build in, except for one small problem; almost all of it is covered in tall grass. What's the quickest way to clear all of this tall grass? NOTE: I would like the actual grass blocks to stay intact

  • The principle gameplay of Core involves firing a quad-directional laser by pressing a direction and a button simultaneously. If you hit a beat, it gets cleared, you get score, etc. It is also possible to shoot the laser when there aren't beats in that direction, which will cause "Miss" to appear. Does getting a miss in this instance (when there are no beats to hit, rather than actually "Miss"-ing a beat) have any effect on your combo, counter, or affect SUPER mode?

  • Bore is a skill that lets your bullets pierce through enemies dealing bonus damage to subsequent enemies hit. It's description says Each additional target takes +100% bullet damage Does this mean the +100% is cumulative (+100% for the second target, +200% to the third target, etc) or is it just a flat double damage after the first? For that matter, is there a limit to how many targets a shot can pierce? It also mentions this does not affect rockets and other special types of projectiles. What projectiles does it not affect?

  • In Megapolis on the iPad how do you rotate the view so you can see behind large/tall buildings? I can rotate individual buildings but not the whole view/city.

  • For some reason, my rockets sometimes fail to hit the drop ship I'm aiming at, which can be a problem because it requires a full set of 3 rockets to take one down. How do I prevent the rockets from falling off course? I know that I have to keep the lazer on the ship, but is the drop ship somehow deflecting them?

  • How can I set my bukkit server on my mac to use more than 1 core? I set my server to use 12 gigs of RAM for now, considering that I will be adding more servers soon. My iMac has these configurations: 3.5GHz Quad-core Intel Core i7, Turbo Boost up to 3.9GHz 32GB 1600MHz DDR3 SDRAM - 4X8GB 1TB of PCIe-Based Flash Storage NVIDIA GeForce GTX 780M 4GB GDDR5 It uses mavericks. Also, is it possible to use the graphics card for the server (considering that the RAM on it is MUCH faster than the standard 1600MHz RAM) when the card is not in use? Thanks so much guys!

  • What are the names of the array of weapons you can have in the game Centipede (1998 PC version)? What are the effects they can do? I don't just want to know all of the blaster abilities. I also want to know the Destroyer abilities (bombs,rockets). If people could leave their answer in a bulleted or numbered fashion that would help me the most.

  • When checking my stats, I can see I have already played more than the 1000 rounds of versus mode per the trophy description but it didn't unlock. I also see the statistic of the Tall Tale (Play 1,000 rounds of Versus mode) trophy at 0% (meaning no player has unlocked it). Could it be just the trophy description that is bad and the trophy is actually for completing 1,000 matches (not rounds)?

Data information