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Small turntables for N scale
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As I said in my first post,you're gonna end up scratchbuilding the roundhouse,too.You CAN NOT use a roundhouse for a 10 inch turntable on a 5 inch turntable.To understand why,grab a piece of n track,a ruler,and a compass.[or,for that matter,2 bowls,one twice as big as the other.]Draw 2 circles,one inside the other.Take the track,and put it across the middle of the inside circle.Put a mark on the both sides of the track,on the first circle,and then draw a line from the center of the circle,up the middle of the marks from the track.Now,move the track over so the left side of the track lines up with the old right side mark,and repeat the process,until you've done 5 or 6 tracks.Now,starting with the original line back up the middle of the track,repeat the whole process on the outer circle.Once you decide how big of a turntable you want,bye the way,that's exactly the way you would lay it out to get the centerlines for your stalls.You can use a roundhouse with a larger turntable than the one for which it was intended,but not a smaller one.Also,really,there's no such thing as a small roundhouse.If you made say,a 4 inch table,you'd probably only get,maybe,10 tracks on it.Don't forget,ya gotta have a track to get in and out,and the whole thing would have tracks around it.You'd end up with a roundhouse that completely encircles the table,so you'd hafta look down into it to see anything.If you had a 4 inch table,with 4 inch tracks outside the roundhouse,and the roundhouse had 4 inch stalls,you just ended up with a 20 inch[minimum] circle to store 10 locos[or less] and you won't be able to see them!! If you draw a 4 inch circle,or smaller,and lay the tracks around it,you'll see what I mean.Maybe you should consider a shed with switches,and a seperate turntable,off to the side somewhere.
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