Double row radial engine.
<video controls autoplay loop> <source src="https://s3-us-west-1.amazonaws.com/hmt-forum/double_row_radial_engine.mp4" type="video/mp4"> Your browser does not support the video tag. </video>
Previously:
https://www.homemadetools.net/forum/...047#post164668
https://www.homemadetools.net/forum/...529#post142982
https://www.homemadetools.net/forum/...006#post129749
https://www.homemadetools.net/forum/...772#post133168
https://www.homemadetools.net/forum/...387#post150781
