Regal Aviation has expanded its fleet of managed aircraft with the addition of four new customers. The Dallas-based charter, sales and management company has added a Gulfstream IIB, two Hawker 700s and a new King Air 200, bringing the total Regal fleet to 21 managed aircraft. Regal has completed the first phase of its new 80,000-square-foot customer care center at Dallas Love Field. Final completion is scheduled in early 2002.