Design of the Yak-41 (or possibly Yak-141; see below) began in 1975; the first prototype flew in March 1987, followed by a second in April 1989. Tests were conducted on the aircraft carrier "Admiral Gorshkov". In April 1991, one of the prototypes set several records for VTOL aircraft; it was displayed at the Paris Air Show shortly afterwards. One prototype was lost in a crash (attributed to pilot error) on the carrier in November 1991, after which development was suspended (due to lack of funds rather than any problems with the aircraft); the surviving aircraft was mothballed.
Yakovlev have recently announced their intention to restart development of the Yak-41, apparently as a result of renewed interest from the Russian Ministry of Defence (a similar revival of the twin-turboprop Yak-44 AEW aircraft is also being considered).
A more advanced version, the Yak-41M (Yak-141M?), has also been designed,
with the emphasis now on Air Force rather than Navy service. This version
has an extensively modified airframe, with a strong emphasis on stealth
(there is a distinct resemblance to the F-22), a much more powerful engine,
and more fuel and payload.
The "Freestyle" has been referred to as both Yak-41 and Yak-141; it appears that one designation refers to the standard fighter and one to the single prototype modified for record attempts, but there seems to be some uncertainty as to which is which.
Class H: VTOL jets
Group III: turbojets
Pilot: A. A. Sinitsin
| Date | Record | Performance |
| 11 Apr 91 | Time of climb to 12,000 m | 116.15 sec |
| 11 Apr 91 | Time of climb to 12,000 m with 1,000 kg | 116.50 sec |
| 12 Apr 91 | Time of climb to 3,000 m with 1,000 kg | 62.41 sec |
| 12 Apr 91 | Time of climb to 6,000 m with 1,000 kg | 74.37 sec |
| 12 Apr 91 | Time of climb to 9,000 m with 1,000 kg | 89.09 sec |
| 24 Apr 91 | Max payload at 2,000 m | 2,507 kg |
| 25 Apr 91 | Max altitude with 1,000 kg | 13,115 m |
| 25 Apr 91 | Max altitude with 2,000 kg | 13,115 m |
| 25 Apr 91 | Time of climb to 3,000 m with 2,000 kg | 68.82 sec |
| 25 Apr 91 | Time of climb to 6,000 m with 2,000 kg | 88.88 sec |
| 25 Apr 91 | Time of climb to 9,000 m with 2,000 kg | 110.10 sec |
| 25 Apr 91 | Time of climb to 12,000 m with 2,000 kg | 130.64 sec |
| External load carried on four underwing pylons | Radius |
| 4xR-77 | 670 km |
| 4xR-77 + 1x2,000l fuel tank (centerline) | 900 km |
| 2xR-77 + 2xR-73E + 1x2,000l fuel tank | 900 km |
| 2xKh-35 + 2xR-73E + 1x2,000l fuel tank | 780 km |
| 4xKh-35A + 1x2,000l fuel tank | 550 km |
| 4xKh-35N + 2xRVK-AE + 1x2,000l fuel tank | 670 km |
| 6xABSP up to 500 kg | 420 km |
| 4xNRS 87-240 mm + 1x2,000l fuel tank | 670 km |
| 2xKh-31P + 2xR88-AE + 1x2,000l fuel tank | 670 km |
| 2xK25 + 2xR-73E + 1x2,000l fuel tank | 820 km |
| Gsh-23: 250 rounds each + 1x2,000l fuel tank | 820 km |
Yak-141 has an internal 30 mm canon with 120 rounds