Talk about an experiment going wrong. Have you ever seen this style of suspension in service? Back in the late 70's and early 80's these suspensions were used in British Columbia. They worked very well, except when the wind blew, and because of their shape they caught too much wind. Suspensions are designed to cut the wind, not resist it. Imagine these insulators swinging in the breeze, because of all the surface resistance. Some towers suffered structural damage due to all the swinging back and forth movement up at the top of the towers. This resulted in the suspensions being removed from service. The metal caps bear the "P within the C" logo of Canadian Potteries.