06-01-2011, 04:28 PM
JASmith Wrote:Does anyone know the basis for the L/D = 5 being a practical length limit?That's a good question. I'm surprised that I didn't ask it, since I normally question everything. :o
Quote:I...found several in the range of 5.4<L/D<5.8 so it would appear that L/D = 5 is not a hard limit.Yes, that does seem to be true. Some of the CETME bullets we discussed elsewhere had a 5.7 L/D.
Perhaps the 5.0 "limit" came about back when conservative tangent ogives were used pretty much exclusively?
