After the trials and tribulations in the foundation period, the sixth Nakajima Type 4 was finally completed, and flew over Ojima Town proudly.
In 1919, the first mail plane contest was held between Tokyo and Osaka. Nakajima Type 4 cleared the distance in 3 hours and 18 minutes, and defeated the imported planes. Together with the prize money of 9,500 yen, it provided a good opportunity to demonstrate their engineering superiority to the public.
All Aero 