Karl Friedrich

Karl Friedrich designed the 1 inch scale "Dinky" 0-4-0 "shifter" in 3.5 inch gauge.

Karl attended the Second BLS Meet in 1934.

On Lagging

Karl wrote the following regarding lagging in The Live Steamer, May-June 1951:

In regards to the question of "lagging boilers", my position is that it resolves itself around the relative merits of a small lagged boiler versus a larger unlagged boiler. Thus a locomotive that requires a boiler 5 inch diameter that is lagged so that the result is a 5-1/2 inch or 6 inch diameter over the lagging, why not use the larger diameter for the boiler proper in the first place? To my mind, the resulting boiler will be easier to manage on account of its larger firebox, water capacity and steam space. To me this is more desirable than the last ounce in efficiency. I might also mention that most of L.B.S.C. boilers are not lagged. For that matter neither are mine, and I now have four, of which only one is lagged. That was the first one I built some 25 years ago.