GREAT PLANES ADD ONS VOL 4Choose from a variety of airplanes that span the ages of aviation; with aircraft that are sure to catch the interests of every modeler. Select from the docile Spectra SelectTM Sailplane or the gentle TutorTM park flyer. Or, if tearing up the skies is more your style, Add-Ons Volume Four features the show-stopping Edge 540! Plus, everything in-between from a P40 Warhawk to an RV-4, to a Pitts biplane. Want to try your hand at helis? Add-Ons Volume Four has you covered there as well with your choice of three whirlybirds*. Take Kyosho's latest release, the highly aerobatic Caliber 30, out for a test flight. You'll also be able to pilot Kyosho's Concept EP or a scale rendition of a Huey. Flying sites take you where RealFlight has never gone before! New 3D flying sites enhance your simulation experience even more! You'll enjoy flying from the full-sized airport nestled amongst the snow-covered mountains. Or, venture through a maze of canyons- perfect for a multiplayer game of chase. If you're up for a bit more excitement, hold on tight as the catapult launches you off the deck of a battleship!