This is the worlds first recorded loop of a helicopter. the pilot was Haroled E. Thompson. He is flying the Sikorsky S-52 with an Franklin engine out of a Tucker automobile. He set a world speed record of 129.6 the same year.
This has a higer resolution than the 1st video I posted
![Worlds First Helicopter Loop - 1948: H. E. \"Tommy\" Thompson (HiRes)](http://img.youtube.com/vi/ETXVCTaOHIA/2.jpg "Worlds First Helicopter Loop - 1948: H. E. \\"Tommy\\" Thompson (HiRes)")
