In 1925 Irbitis met Nicholas Pulins. Mr. Pulins had an interest in light aviation and Irbitis influencec him to start building a high wing monoplane with Anzani engine. Previously Pulins have interest in biplanes. With the financial support, Irbitris made his first aircraft, the I-1 and it had its maiden flight on 13th June 1925. I-1 was single seat airplane and follow to this is I-2, two seat aircraft and name Ikarus. On I-2 both, Irbitis and Pulins learn to fly.