The NA-40 bongo is a 2 seater light helicopter made jointly by Robinson helicopters inc and morovan aeroplanes Inc. it is a simple and sleek helicopter made to fly well. With two gyroscopes. History: Design work 1992 followed by model tests 1993; construction of Bongo technology demonstrator started 1996; public debut at ?rno International Machinery Fair 1997 (then called TINTS NA40 and with two-blade main rotor) by first prototype OK-CIU. Began 70 hours of tethered hover flights March 1998. Two further prototypes completed by mid-1998. NA Design plans Normal category certification to FAR Pts 27, 33, 34 and 36 by late 2003, subject to finding joint venture Western partner to share certification, manufacturing and marketing costs. However, by 2002, financial support of US$2.5 million was still being solicited, but nothing further had been heard by early 2003.