Those facing an urgent need to move aircraft with flat tires will appreciate the latest advance from Disabled Aircraft Services. The company says its second-generation PlaneSkate is a dolly that fits under the affected wheel and allows the aircraft to be moved easily. The improved device presents a new tray design and other improvements, which, according to the Minnesota-based manufacturer, provides 30 percent more structural capacity than its predecessor. The latest model can accommodate aircraft with wheel fairings, the lower-profile gear found on newer Cessnas, and even allows tail-first towing for taildraggers. The 300-pound 4K model is designed for aircraft with a gross weight of 10,000 pounds or less, while the beefier 30K version can handle jets up to 75,000 pounds, limiting runway or taxiway closure caused by flat tires to 10 minutes or less, the company said.