OK ... you've stumped me here. Why 87 degrees? What's magic about that?!? I thought 90 was the preferred quartering target?The off-set from side to side is exactly like the original tools, 87 degrees, (90 we all know will work).
If you notice on the sides of the jig, there are areas that were milled off, or milled at an angle. The plate, if left squared, would have hit several spots on the chassis, so the problem areas were eliminated... As for the 87 degrees, I knew that was the correct off-set, but to achieve that, it would have been impossible by eye, so 90 does work.. My guess is Gilbert, through trial and error, found that 87 was a better off-set..Any less or more, and you'll either get a clicking sound during running,or a bind in the linkage.'Nut --
Nice craftsmanship. Simple components, but quite reliable and functional.
Do most AF 6-wheel motor allow a jig like this to fit on the motor casing, without other motor stuff getting in the way? Just curious. I know on the Lionel prewar end, there are often parts of the motor frame that would bump in the way of a jig like this.
OK ... you've stumped me here. Why 87 degrees? What's magic about that?!? I thought 90 was the preferred quartering target?