I calculated it this way:McGiever wrote:Did I see correctly...a AA260 can burn 19.2 lbs/ hr.?...where does that put the AA130?
The 1949 Bureau Of Mines report stated that the AA-130 actually has on the order of (from memory) 116,000 BTUH input.
I then assumed the typical anthracite pea to have 12,300 BTU's per pound.
116,000 / 12,300 = 9.43 lbs./hour max feed (and also burn) rate. (which is how I came up with 0.157 lbs./min of burn rate at maximum rated output)
***Not relevant here, but at max fire the same report stated that the efficiency of the AA-130 is (coal dependent) 80% to 81% (call it 80.5%).
At idle I presume the efficiency falls off noticeably from 80.5%. By my calculations overall efficiency (idle fire and max fire and everything inbetween) is about 70%.