@HermesAerospace Ok, I‘ll do the vizzy once you‘re done

@TheVizzyLucky @OrionTechnologies I can build it, i had a fairly similar idea, just using very very edited rcs thrusters moving up/down.

@TheVizzyLucky, any of those options would work. We’re all a bit tied up here with Phoenix OT-2 preparations and other projects, so might be delayed if i do it.

@OrionTechnologies I can make the vizzy for that, I just probably can't build it - at least not particularly good. Can you build it yourself or should I ask the others (Hermes and Astron7)? Sorry it took so long to answer, I forgot to add this to my list.

too bad i thought of this first but never built it

@TheVizzyLucky, okay. So, my idea such far involves just a stack of white textured inlet that are slightly wider than the tank diameter. Perhaps 10 would be sufficient for a stockier stage. Each inlet would have a piston attached to its bottom, and would move up or down depending on how much fuel is present in the tanks. When the prop tanks are full, all inlets/pistons would be fully extended, but as the fuel decreases, so would the piston height, collapsing the inlets, and effectively lowering the ice level, and giving the impression of active cryogenics in the tanks. For RP-1/LOX rockets, would just need it for the upper part of the tanks(where the LOX is stored). For LCH4/LOX fueled, would need two sets of this device, one for each tank.

@OrionTechnologies Seems possible. Tell me the details (how exactly the inlets should move) and I'll make the vizzy asap (I got a busy weekend - and a lot of other requests - though, so it might take a while). Just one thing: I'm horrible at building, so you might have to build it first.

@TheVizzyLucky, I’ve been thinking about a method to visualize cryogenic propellants on the skin of fuel tanks. Using many white inlets attached to pistons(in a sort of Russian Nesting Doll style), would link movement to fuel percentage. Could you make this work?

These MfD crafts are much more popular than I expected - this one even got me the last points missing for 1k points. Thank y‘all for the upvotes!

@TheVizzyLucky np

@lafario Thanks!

Nice!