Testing
Two prototypes were built. Each remained unpainted. They were found to be only slightly heavier than the earlier Yak-15 and Yak-17. The first prototype, (Yak-19-I), had callsign "Yellow 24", and a number "5" on the lower rudder. It first flew on the 8 January 1947 with test pilot M I Ivanov at the controls. In flight the aircraft was found to have pleasant and predictable characteristics. Its worst aspect was the afterburner, which slightly lowered the aircraft's dry thrust. Worse yet, it was ignited by a complicated and totally unreliable procedure which would have been useless in combat. This prototype was later modified with a square-tipped rudder.
The second prototype (Yak-19-II), had callsign "Yellow 25", and the number "2" on the lower rudder. It was seen at the 3 August 1947 Tushino flypast. Differing in minor details, the Yak-19-II had a 4 degree dihedral on the horizontal stabiliser and underslung tip tanks, as on the Yak-17.
S N Anokhin was the test pilot during the NII-VVS testing, which was completed on 21 August 1947. He agreed that the aircraft possessed good handling qualities, but felt that the engine was outdated, weak and unreliable.
After failing State acceptance tests (for reasons including high stick forces, no heating or ventilation, and inadequate armour) further development was abandoned. The death knell of the Yak-19 was also sounded by the arrival of the Rolls-Royce Derwent-derived, Klimov RD-500, which gave quantum leaps forward in thrust, reliability, longevity, and ease of maintenance.
No ASCC reporting name was ever allotted, as the aircraft remained unknown to the west until the late 1970s.
Read more about this topic: Yakovlev Yak-19
Famous quotes containing the word testing:
“Is this testing whether I’m a replicant or a lesbian, Mr. Deckard?”
—David Webb Peoples, U.S. screenwriter, and Ridley Scott. Rachel, Blade Runner, being tested to determine if she is human or machine (1982)
“Today so much rebellion is aimless and demoralizing precisely because children have no values to challenge. Teenage rebellion is a testing process in which young people try out various values in order to make them their own. But during those years of trial, error, embarrassment, a child needs family standards to fall back on, reliable habits of thought and feeling that provide security and protection.”
—Neil Kurshan (20th century)
“No testing has overtaken you that is not common to everyone. God is faithful, and he will not let you be tested beyond your strength, but with the testing he will also provide the way out so that you may be able to endure it.”
—Bible: New Testament, 1 Corinthians 10:13.