Originally Posted by MarkB.

Bill,

I had just started working on a larger R-7; in my case, I was thinking one inch to one meter scale (1/39.37). If you take the Minakov drawing and read the millimeters as inches and decimal places you get a pretty good size R-7. The math is super easy - just count over three places (from the right) and put a decimal-- there's your dimension.

For instance, the booster diameters are 2680 mm so its 2.680 inches or BTH-80 size. Or, even better, the core is 2050mm, so in my scale, its 2.05 inches or Series 20 tubing.

Attached is a fairly high-res, version of the Minakov drawing. I think its the best all-around drawing. I have a higher res version if anyone wants it, just PM me.