Secret enterprises began to actively appear in our city since 1914. On Kirova Street, near house number 63, there was a factory that produced parts for the "Swan" aircraft.

On the vast territory extending deep into Slavy Street, there used to be a large factory. In the early 20th century, it produced furniture, but went bankrupt during the war. The state purchased the vacant premises and transferred them to the Ministry of Defense. Here, they produced propellers, wooden fuselages, and other parts for the "Swan-12" biplanes. These aircraft were used on the front as reconnaissance planes. Russian pilots observed enemy positions, recording defense lines, troop movements, and artillery placements. Although the "Swans" could ascend to great heights, their low speed and maneuverability made them easy targets for fighters and air defense. Pilots could return fire, but the "Colt" machine gun had a limited turning radius, reducing the firing angle.

Nevertheless, there were positive aspects. During factory tests, the aircraft reached a speed of 120 km/h and with a payload of 350 kg ascended to an altitude of 2000 m in 22 minutes. The rigid engine installation and lack of vibrations were considered advantages. The "Swan-XII" surpassed the German "Albatross" in "reserve of flight at 700 engine revolutions" (low gas), improving flight characteristics, but the effort on the control stick increased, requiring adjustments.

The production of aircraft parts, although for different models, continued in Penza even after World War I. However, in 1923, the factory was closed due to lack of funding.