Reply to "What is this?"

overlandflyerOGR Forum Member

for O54 track... (27 - 27cos 15°) = 0.92"

for O72 track... (36 - 36cos 11.25°) = 0.69"

the chord length need not be part of the equation. the key is really what track MTH based the radius on... by now i'm hoping manufacturers have decided that the center rail be the ruling track radius. you have to assume the accuracy of the arc length in being close enough to create a smooth 360° circle.

7/28/193:38 AM

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