Claim: The majority of the aircraft (66%) built by Aviatsionnaya Ispitatelnaya Stantsiya are experimental aircraft, and the minority of his built (33%) are trainer aircraft.
Evidence: Summary of aircraft built by Aviatsionnaya Ispitatelnaya Stantsiya Dokuchayev No.1 Experimental aircraft Dokuchayev No.2 Experimental aircraft Dokuchayev No.5 Experimental aircraft Dokuchayev No.6 Experimental aircraft Dokuchayev No.3 Trainer aircraft Dokuchayev No.4 Trainer aircraft