Aircraft deliveries at Vero Beach, Florida-based Piper Aircraft rose 23% in 2017 compared to 2016, while billings increased 27%, the company said. The growth was driven by a 50% increase in deliveries of Piper’s single-engine primary trainer aircraft and from a 70% jump in multiengine trainer deliveries. In addition, sales of its M600 rose 59%, which helped drive billings up nearly $41 million in 2017, Piper said. International deliveries rose 5% in 2017 and represented 25% of total ...