Just kinda looks a little like the real thing?
My understanding of semiscale is that the dimensions are pretty close, but not exact. I think usually this is because of stability. The fins (if they exist) on the real thing may not be sufficient for stability on the flying model, so the fins on the semiscale model are slightly larger than scale, or the rocket may be slightly longer. So, it mostly looks like the real thing, unless you scrutinize it closely.
So, it mostly looks like the real thing, unless you scrutinize it closely.
Sport scale models from a competition standpoint have to have a high similarity of outline to the real thing, but aren't measured for accuracy.
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