| R-27 AA-10 Alamo | |
|---|---|
R-27T German Air Force MiG-29 firing an R-27R | |
| Type | Medium range BVR air-to-air missile Anti-radiation missile (R-27P/EP) |
| Place of origin | Soviet Union |
| Service history | |
| In service | 1983–present |
| Wars | |
| Production history | |
| Manufacturer | Vympel (Russia) Artem (Ukraine) |
| Unit cost | N/A |
| Specifications | |
| Mass | 253 kg (558 lb) |
| Length | 4.08 m (13.4 ft) |
| Diameter | 230 mm (9.1 in) |
| Wingspan | 772 mm (30.4 in) |
| Warhead | Blast/fragmentation or continuous rod |
| Warhead weight | 39 kg (86 lb) |
Detonation mechanism | Radar-proximity and impact fuzes |
| Engine | High performance, w. directed-rocket motor Solid-fuel rocket motor |
Operational range | R-27T: up to 40 km (25 mi) R-27T1: up to 80 km (50 mi) R-27ET: up to 120 km (75 mi) R-27ET1: up to 80 km (50 mi) R-27R: up to 73 km (45 mi) R-27R1: up to 75 km (47 mi) R-27ER: up to 130 km (81 mi) R-27ER1: up to 100 km (62 mi) R-27P: up to 80 km (50 mi) R-27EP: up to 130 km (81 mi) R-27EA: up to 130 km (81 mi) R-27EM: up to 130 km (81 mi) |
| Flight altitude | N/A |
| Maximum speed | Mach 4.5-5.8 (version dependent) [citation needed] |
Guidance system | Semi-active radar homing (R-27R/ER/EM) Active-radar homing (R-27A/EA) Infrared homing (R-27T/ET) Passive-radiation homing (R-27P/EP) |
Launch platform | Su-27, Su-30, Su-33, Su-34, Su-35, Su-37, F-14 (done by Iran), MiG-23, MiG-29, Yak-141, J-11 (done by China), local conversion as a surface-to-air missile in Yemen |
The Vympel R-27 (Russian: Вымпел Р-27; NATO reporting name AA-10 Alamo) is a family of air-to-air missiles developed by the Soviet Union during the late Cold War-era.
The R-27 is manufactured in infrared-homing/IR (R-27T, R-27ET) and semi-active radar homing/ SARH (R-27R, R-27ER) versions. The R-27 family missiles are produced by both Russian and Ukrainian manufacturers. The R-27 missile is carried by the Mikoyan MiG-29 and the Sukhoi Su-27, Su-30 and Su-35 family fighters. The R-27 missile is also license-produced in China, though the production license was bought from Ukraine instead of Russia. Plans to produce an active radar homing/ ARH version called the R-27EA were cancelled in 1989.


R-27R and ER variants can be used in any meteorological conditions. Launch can be made at less than 5 g overload and less than 50 deg/s roll rate. It is allowed to redesignate targets during flight, and can share target illumination with other aircraft.
R-27T and ET variants can be used out of cloudiness, at least 15 degrees away from the bearing of sun, and 4 degrees away from the bearing of moon and ground-based heat-contrasting conditions. In cases of maximum head-on range launches where lock-command cannot be utilized, missile can not be fired. Seeker must acquire target before launch. On the combat operations section of the Su-27 manual, this is especially recommended for head-on usage for passive attacks at targets with 0 degrees approach angle (i.e. another fighter moving to intercept), leaving target unalerted to the incoming missile. Launch can be made at 0 to 7 g, but limited to 6 g if roll induced slip is more than 2× diameter of the ball.
Other variants:
In the 1999 Eritrean-Ethiopian War, Eritrean MiG-29s fought Ethiopian Su-27s, both piloted by Russian mercenaries. Only one R-27 fired by an Ethiopian Su-27 at an Eritrean MiG-29 proximity-fuzed near enough to the MiG that the damaged aircraft eventually crashed on landing.
During the war in Donbas, the Ukrainian Air Force claimed that one of its Su-25 was shot down by a Russian Aerospace Forces MiG-29 using a R-27T on 16 July 2014. Russian officials denied any involvement.
The R-27 was used by both sides during the 2022 Russian invasion of Ukraine.
During the Yemeni Civil War (2015–present) Houthis have used R-27T missiles modified to serve as surface-to-air missiles. A video released on January 7, 2018, also shows a modified R-27T hitting a Saudi led coalition fighter on a forward looking infrared camera. Houthi sources claim to have downed an F-15. Rebels later released footage showing an aircraft wreck. However, serial numbers on the wreckage suggested that the downed aircraft was a Panavia Tornado, also operated by Saudi forces. On January 8, the Saudi Press Agency admitted the loss of an aircraft over Yemen, though it did not clarify whether it was a Tornado or an F-15, blaming the crash on 'a technical issue' and reporting that the pilots ejected and were recovered by friendly forces.
On 21 March 2018, Houthi rebels released a video where they hit and possibly shot down a Saudi F-15 in Saada province. In the video, an R-27T air-to-air missile adapted for surface to air use appeared to have successfully hit a jet. As in the video of the previous similar hit recorded on 8 January, the target, while clearly hit, did not appear to be downed. The Saudi forces confirmed the hit, while saying the jet safely landed at a Saudi base. Saudi official sources confirmed the incident reporting that it happened at 3:48 pm local time after a surface-to-air missile was launched at the fighter jet from inside Saada airport.

