Editing Yakovlev Yak-1 (section)

==Variants==
* [[File:Yakovlev I-26 and Yak-1 (early) side-view silhouettes.png|thumb|Side-view silhouettes of the Yakovlev I-26 Krasevec and an early production Yak-1.]]'''I-26''' (also known as Ya-26<ref name="Gunston p.461">Gunston 1995, p. 461.</ref>) – The first prototype of the Yak-1 and progenitor of all Yakovlev's piston-engined fighters of World War II. Of mixed steel tube and wood construction the lightweight I-26 displayed promising performance and was produced as the Yak-1.
* '''UTI-26''' – The third and fourth I-26s were completed as dual control trainers, produced as a fighter as the [[Yak-7]].
* '''I-28''' (<ref name="Gunston p.462">Gunston 1995, p. 462.</ref>) – High-altitude interceptor prototype with [[Klimov M-105]]PD engine developed from I-26-2. Differed from I-26 in having an all-metal fuselage and tail and automatic, leading-edge slats on slightly smaller and reshaped wings. One aircraft was built, first flying on 1 December 1940. It did not enter production due to many deficiencies of the engine but served as the basis for high-altitude versions of [[Yakovlev Yak-7|Yak-7]] and [[Yakovlev Yak-9|Yak-9]].
* '''I-30 (Yak-3)''' – Development of I-26 with an all-metal wing with leading-edge slats, weight and space savings were used for additional armament and greater fuel capacity. Two prototypes built – I-30-1 armed with 3 × {{convert|20|mm|in|abbr=on}} [[ShVAK]] cannons and 2 × {{convert|7.62|mm|in|abbr=on}} [[ShKAS]] machine guns, and I-30-2 with two additional ShKAS. It did not enter production. The name Yak-3 was re-used for a different fighter. See [[Yakovlev Yak-3]].
* '''Yak-1''' – Single-seat fighter aircraft. Initial production version.
* '''Yak-1b''' – ("b" was an unofficial designation; after October 1942, all Yak-1s were built to this standard). New [[bubble canopy]] with lowered rear fuselage, increased armor, ShKAS machine guns replaced with a single {{convert|12.7|mm|in|abbr=on}} [[Berezin UBS]], electrical and pneumatic firing of the weapons instead of the mechanical system, new control stick based on the [[Messerschmitt Bf 109]] design, new gunsight, airtight fuselage, retractable tailwheel, improved engine cooling, [[Klimov M-105]]PF engine with better low-altitude performance. The first flight (aircraft No.3560) took place in June 1942, with aircraft entering production in August. A total of 4,188 were built.
* '''Yak-1M''' – [[Yakovlev Yak-3|Yak-3]] prototype with a smaller wing, revised cooling intakes, reduced overall weight and upgraded engine. Two were built.
* '''[[Yak-7UTI]]''' – Initial production version of the UTI-26.
* '''[[Yak-7]]''' – Conversions of Yak-7UTI and new production of fighter version of Yak-7UTI.
* Several other Yak-1 variants did not receive special designations. These include prototypes with [[Klimov VK-106]] and [[Klimov VK-107]] engines, production aircraft capable of carrying external fuel tanks, production aircraft with the ability to carry 6 × [[RS-82]] rockets or 2 × {{convert|100|kg|lb|abbr=on}} bombs, and lightened versions for air defense.