Re: Sawyer Massey steam Engines
More Sawyer stats from the early teens(?):
Class B Side Mount Engines:
B3 - simple - 22x68 - 9x11; firebox lxhxw 44x35&1/2x26; tubes 44 x2" x89&1/4; 170psi; Sawyer-Massey (Woods) valve gear.
B5 - simple - 25x76 - 9&1/2x11; firebox 44x37x29; tubes 56x2"x89&1/4; 167psi (?); S-M valve gear.
B7 - tandem compound - 27-82 - 7&1/4and11x10; other stats same as B3; Woolf gear.
B9 - tandem compound - 30-96 - 7&1/2and12x11; stats same as B5; woolf gear.
B11 - tandem compound - 32-106 - 7&3/4and12&1/2x11; firebox 50x37x29; tubes 56x2"x95&1/4; 172psi; Woolf gear.
Now, wouldnt that B11 be one big slob of a side mount engine

Class C Rear Mounts are the same ratings, etc, but wider wheel tread. C3, 5,7,9,11.. Class C13 is 35-115 simple 12x14; firebox 54x42x34&1/2; tubes 74x2"x102; 396sq ft heating surface; 84x30 rear wheels; S-M valve gear.
Rear wheels on B3,C3 are 68diamx24tread; B5,7,9,C5,7,9,11 are 68x30.
Rick.