Hi all.

I'm piecing a build together of FSI's Black Brant II. I downloaded the instructions from oldrocketplans.com/fsi/fsiMRK-14/FSI_Black_Brant_II.pdf. I printed the fin page and began to take some measurements. Compared with the scale drawing from G. Flynn (11/1/1971) the FSI fin seems to come up being on the small side. The tail cone also seems to want to be fatter at the nozzle end, too (1.75" vs 1.4" @ 1/8 scale). Has anyone else noticed this? I'm finding it rather difficut to find more than just a few sources of scale data on this bird.

Thanks all.

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Andrew A
NAR 33674
SAM 0139