I revive that thread again for a new performance. Here is my payload, that's slightly over 1 kton:
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Wait, I've already done more than that, so what's the point? Well, there's a subtle difference...
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That's right, I'm doing it in IRIS!
Let me present the first kiloton lifter built for IRIS:
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Yep, the SSSSSLS, the Strongly Steroidized version of the SSSLS. That's a launcher I initially built a while ago for this purpose. The one you saw until now is actually a variant, that one has a second stage.
Enough talk, let's go!
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I like how the launcher is still clearly visible from that distance, even if the launchpad isn't...
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The flight goes very well...
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Then booster separation, and the rocket continues on its 56 Frontier engines:
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Fairing separation, revealing both the payload and the Frontier array from the second stage:
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And finally, the last stage ignition:
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Until I reach orbit:
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And it still has fuel to spare