| General Information | |
|---|---|
| Type | Yak-125 |
| Function | Reconnaissater |
| Year | 1952 |
| Crew | 2 |
| Powerplant | |
| Type | 2*AM-5 |
| Power at m | 2*2000kg |
| Size | |
| Length | ?m |
| Height | ?m |
| Wingspan | 10.94m |
| Wing area | 28.95m2 |
| Weights and loads | |
| Empty | ?kg |
| Loaded (no external tank) | 9177kg |
| Loaded (with external tank) | 9630kg |
| Wing Load (kg/m2) | 333 |
| Thrust to Weight |
0.42 |
| Speed (with external fuel tank, Factory Trials) | |
| at 3000m | 1120km/h |
| at 10000m | 1075km/h |
| Speed (no external fuel tank, State Trials) | |
| at 5000m | 1110km/h |
| at 10000m | 1052km/h |
| Landing | ?km/h |
| Maneuverability | |
| Turn time | ?sec |
| Roll | |
| Landing | ?m |
| Takeoff | ?m |
| Range (Factory Trials) | |
| Maximum | 3600km |
| Flight Endurance | 4h25min |
| Range (State Trials) | |
| Operational | 3040km |
| Ceiling (Factory Trials) | |
| Operational | 15000m |
| Ceiling (State Trials, no external fuel) | |
| Operational | 14140m |
| Climb | |
| 5000m | ?min |
| Payload | |
| Fuel (internal) | 3925l |
| Fuel (external) | 675l |
| Guns | |
| 1*NR-23 80 rounds | |
Yak-125 reconnaissater by A.S.Yakovlev
 |
Tactical reconnaissance version of the Yak-25, designed in parallel with Yak-25K interceptor. Reconnaissater differed by deleted radar and metal nose section, extended to accommodate bulky photo equipment. Two AKAFU were installed, each equipped with three cameras: AFA-33/100M, AFA-33/75M and AFA-33/50M (different focus base lenses). In addition, perspective installation of two cameras (AFA-33/75M and AFA-22/50M) could be switched between port and starboard positions.
All cameras (and window shutters) were controlled from navigator cockpit. This cockpit also had glazed floor and was equipped by bomb sight OBP-1P. Armament included single starboard NR-23 cannon with 80 rounds. Additional fuel tank could be installed under fuselage.
Project design was ready in 1951, and full-size mockup of the nose section was presented to VVS representative in December. Factory trials of the aircraft began on August 26, 1952. Factory pilot V.M.Volkov and test-pilots of the NII VVS S.N.Anokhin and Ya.I.Bernikov performed 79 flights (83h25min) until October 3.
State trials at NII VVS were carried out in a short two months: December 25 1953 to February 26, 1954. Yak-125 was compared to its competitors Il-28R and MiG-15Rbis:
 Yak-125 |
 Il-28R |
 MiG-15Rbis |
|
|---|---|---|---|
| Maximum Speed | 1110km/h | 880km/h | 1050km/h |
| Range (with external tanks) | 3040km | 2020km | 3150km |
| Ceiling (no external tanks) | 14140m | 15700km | 12500km |
Equipment of the Yak-125 was almost even with the Il-28R. Conclusion of the State Trials was favorable for Yakovlev due to better flight performance of his plane. Nonetheless, extended nose section severely restricted pilot's view, and navigator's view field was just next to marginal.
Aircraft was redesigned using experience gained during development of a bomber version (Yak-125B), and a pre-series designation Yak-25R was assigned to the plane.
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| Modified December 11, 1996
Modified February 21, 2000 |
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