File talk:Single-cylinder T-head engine (Autocar Handbook, 13th ed, 1935).jpg

Should it be noted somewhere that this picture is technically incorrect?

Compare to the text in the WP article where it is used, https://en.wikipedia.org/wiki/T-head_engine : The intake valves are on one side of the engine block and the exhaust valves on the other. Seen from the end of the crankshaft, in cutaway view, the cylinder and combustion chamber resembles a T - hence the name "T-head". (Emphasis added.) In this pic, though, the T shape is longitudinal; the valves are not to the sides but ahead and abaft of the cylinder, so the single camshaft is parallel to and directly above the crankshaft -- where it will inevitably interfere with the crank. Just look at it, if that engine rotates, the crank will slam into the camshaft as soon as the piston nears TDC or BDC (and probably the piston itself too, at BDC). See the difference with the photo of a two-cylinder engine in the WP article, where you can see that the flow goes sideways: intake on the near side of the pic, exhaust (less visible, but you can see the plugs above the valves) on the far side. Too bad, it could have been a really great illustration, but it's just screwed up. (Should it be slightly photoshopped? ;-) ) Personal sidenote: Wow, cool, it never occurred to me that "modern" concepts like twin camshafts and four-valve cylinder heads could have been applied to "archaic" side-valve engines. --CRConrad (トーク) 11:36, 5 May 2017 (UTC)

Found a better solution than photoshopping: Do not use this as an illustration in other projects! Use the same illustration as on the German-language "T-head_engine" WP page in stead: T-head single-cylinder Otto engine (Army Service Corps Training, Mechanical Transport, 1911). --CRConrad (トーク) 08:57, 9 May 2017 (UTC)