From the moment he starts speaking, you immediately pick up Joe Clark's infectious love for the business. He tells us how he got started in the winglet business, how Southwest really turned the industry on to their solutions and where they are going next - spiroids (a new word we need to learn), the coming plans for the 777 and the fact he can't talk about working with Airbus - but he shares his thoughts on how neat an A380 with winglets might be.

Joe Clark may be the only person outside the oil industry who likes high fuel prices. These reaffirm the value of winglets which can now be amortized in two years.