yep but they tend to be kinda long thoughIf you want little to no side forces, you should use a Scotch Yoke.
i worked in the nat gas field for a cupl years(gas technician we did everything including rebuilding these beasts) the ajax single cylinder compressor units were amazing you actually started them by grabbing the flywheel rotating just past tdc(note the slot in the guard to use a bar) and introducing one good shot of hi preshure nat gas into the combust chamber to get r rollin'
the flywheel did the rest as you flipped on the spark and carb fuel
the rpm's are controlled by spark cut -out
they were big-ass 2-strokes 8)