Definition of "heli"

HERE’S A GREAT shot of our author Dave Ramsey, who seems to be doing the impossible—flying two helis simultaneously! Actually, he isnt’t; a flying buddy maneuvered his machine into the shot, just to create the illusion.

1990 September, “Helicopter section”, in Model Airplane News, page 91

‘We saw two helis flying north a few weeks back,’ John offered. ‘An Apache and a Chinook. We figured they were hunting al-Qaeda.’

2010, Bob Shepherd, M. P. Sabga, The Infidel, Simon & Schuster, published 2011, page 175

Two helis, both coming in sharp and from a great height. One looked like a Puma; the other, smaller and hovering just above and behind in a chaperone position, was clearly an Apache.

2011, Chris Ryan, Killing for the Company, Coronet, page 308