After a year, and dozens of satisfactory flights, yesterday the 41 on my TFGS Mustang broke.. The front shaft broke just in front of the flywheel, the keyway is still there?, the flywheel, prop extension, 5" spinner, and an 18-12 prop departed thru the front of the cowl.....immediately tail heavy, it shot straight up, and only a topnotch pilot saved major damage by pancaking into a cornfield... YES! The prop and spinner were carefully balanced, and have been on the engine since day one.
Has anyone else experienced this breakage...If there was a flaw in the shaft metal it wouldn't have last this long....This was a sweet running engine, but now it's post-mortem time...any comments?