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| Date: | Sunday 23 May 1937 |
| Time: | 19:00 |
| Type: | TsAGI A-12 experimental autogyro |
| Owner/operator: | Central Aerohydrodynamic Institute (TsAGI) |
| Registration: | |
| MSN: | |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Location: | near Medvezhyi Ozera village, Shchyolkovsky district, Moscow oblast -
 Russia
|
| Phase: | En route |
| Nature: | Test |
| Departure airport: | Chkalovsky |
| Frunze Central Aerodrome | |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
In 43rd test flight at 700 m altitude main rotor blades failed, test pilot Semyon Kozyryev bailed out, but was hit with a blade and died.
Years after the crash it has been attributed to the unsatisfactory design of the rotor blades, in which the phenomena of fatigue of the spar material under variable dynamic loads were not taken into account.
Sources:
http://www.testpilot.ru/memo/30/kozyrev.htm
http://www.airwar.ru/enc/law1/a12.html
https://military.wikireading.ru/8020
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Jun-2020 10:59 | nempobur | Added |
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