Bell Jet Ranger, the turbine blade spins clockwise at 60,000 rpm while another rotor spins counter clockwise at 45,000 rpm. The main rotor is made from fibreglass over a honey comb core and the leading edge is nickel.
Below is the spark plug fro this helicopter if you look closely you will see the remains of the platinum.
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_132852_zpstm8tlc1r.jpg
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_133943_zpsqm1vwi93.jpg
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_134023_zpscy2wrz68.jpg
Below is the spark plug fro this helicopter if you look closely you will see the remains of the platinum.
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_132852_zpstm8tlc1r.jpg
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_133943_zpsqm1vwi93.jpg
http://i1207.photobucket.com/albums/bb466/gelmgren/trailer/20150530_134023_zpscy2wrz68.jpg
