High Quality Content by WIKIPEDIA articles! The Sadler SV-1 Vampire is a single-seat ultralight sport aircraft developed in the United States in the early 1980s. It is uncharacteristic of ultralight designs in both its layout and its construction. The Vampire is a mid-wing cantilever monoplane of pod-and-boom configuration and twin booms joined by a common horizontal stabilizer. The wings fold for storage and transport, and the undercarriage is of fixed tricycle type. The single engine is mounted pusher-fashion at the rear of the pod that also includes the open cockpit. Construction throughout is of metal.