Re: arc headlights and dynamos - A bit more research

Posted by skip on Jan 30, 2020; 3:12pm
URL: http://c-sng-discussion-forum.254.s1.nabble.com/arc-headlights-and-dynamos-tp15165p15213.html

Todd,
Thanks for your photos of your #12 and the bit of history on placing the generator. I know that my HOn3 effort won't match yours, but I hope to get kind of close. I do think that  your model has exactly the right look to it.

I tried to do enough trig to get a good approximation to the tank position. I think that a distance and angle correction moves it is a bit back from the B3B's 5/9 ratio that John measured. I now think I know how I over corrected the angles resulting in my estimate of the tank about half-way back. John is correct is describing the great detail that can be provided analyzing the angles and distances from a flat photo and I did not do the full suite. At the same time I am not sure that the B3Bs provide a strict prototype for the #12's tank position. Their tanks were already far forward between the domes before electrification and the #12's tank would have been moved forward to do the generator installation. So close, but probably not identical.

This forum has once again really shown its value. The discussion and throwing ideas back and forth has taken me from a question about how the headlight was powered and why the tank seemed further forward in the pictures to a much better understanding of how the #12 was put together. Thanks everyone. I'm forever in your debt.

Skip Egdorf
Los Alamos, NM