New Russian forward-swept wing jet trainer has made its first flight. And here’s the video.

Jan 02 2016 - 11 Comments

Developed by a private Russian design bureau, the SR-10 (CP-10) is a single engine, all-composite jet trainer with a (moderate) forward-swept wing.

The footage below shows the first flight of SR-10, a Russian subsonic, single engine, all-composite dual-pilot jet trainer aircraft developed by KB SAT.

Developed by a private Russian design bureau called KB SAT, the aircraft features a rather unusual moderate forward-swept wing (FSW) scheme: although widely tested since 1936, the FSW has never found applications in fast jets, mainly because of the instability and structural problems induced by the design.

In fact, in spite of a better maneuverability at high AOA (Angle Of Attack), the FSW is characterized by a significant directional instability about the yaw axis, is subject to aeroelasticity issues at the wing tip, and is pretty unstable in stall conditions.

In the 1980s, Grumman built two FSW technology demonstrator, designated X-29, that first flew in 1984 and showed controllability up to 67° AOA. More recently, in 1997, Sukhoi developed the Su-47 Berkut, a supersonic demonstrator that never entered production but only conducted flight testing and performed at several air shows.

X-29 NASA

In a 2009 powerpoint presentation by KB-SAT, the SR-10 was slated to enter production as a trainer in 2011 with an export potential during the period until 2020 assessed in the volume up to 1,000 aircraft in several nations under the Russian influence across all the continents.

According to the same “Engineer note,” the base variant of the aircraft provides for the equipping with the dual-flow turbojet engine AI-25TLSh,  K-93 ejection seats with 0-0 capability (and safe escape up to 950 km/h), a “training efficiency” 10% higher on the average than the efficiency of its next analog – the L-39, and an operating cost much lower than the Yak-130: 2,500 USD vs 8,000 USD/fh.

Not sure if those figures are still valid today.

Top image credit: KB-SAT

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  • Athanor

    Fantastic video…
    Fifteen seconds of some guys walking near a landing strip and a flyby of nearly three seconds…

  • Z-man

    Moderate forward swept wing, seems like a realistic design, good for the Russians!

  • Rod

    This really pisses me off. Back in the day, I remember when the X-29 flew. It was so damn cool. And a success. Then they flew another X-plane (don’t remember the designation) that tested vectored thrust. And it was a success. And you know what became of them? NOTHING. It’s like the Americans tested them, saw that they worked, and then said, “Cool. They work. Ok, we’re done.” And that’s it?! Along come the Russians and THEY say, “Hey look what the Americans tested for us. Let’s use it.”

    • Allister Caine

      That does not mean building those tech-demonstrators was in vain. The F-22 features thrust-vectoring, so the research done with the prototype you are talking about (iirc it was a delta design we europeans based the typhoons airframe on) did yield positive results. You don’t have to put that specific X-craft into production…. ;)

    • OR

      Russia had/has its own forward-swept flying labs.. google up su-37, su-47.. don’t be too upset, they can manage on their own, but this aircraft has been created literally in the garage.. by small private company and Russian MoD is buying 16.. http://www.kb-sat.ru/projects/cp10.shtml here is a presentation in English http://www.kb–sat.ru/i/files/documents/cp10/presentation–cp10–eng.ppt

    • REP

      X-31 and later VECTOR together with the German MBB/DASA/EADS.

      BTW, FSW was also done in Germany in the 40s, Ju 287, later HFB 320 and some gliders.

  • Mongee Phase

    Damn, soo ceeeewl but the X-29 is sexier.

  • InvaderNat

    Meh, I still like the Yak-130 a lot more. This one’s just a budget version.

  • comrade harps

    You’re forgetting the FSW Hansa Jet:
    https://en.m.wikipedia.org/wiki/Hamburger_Flugzeugbau_HFB-320_Hansa_Jet and the Saab Safari/PAC Mushak family of trainers that also have FSW https://en.m.wikipedia.org/wiki/Saab_Safari

    • larryj8

      Yes, I was going to mention the Hansa jet. When I worked as a lineman back in 1976, we used to have one do a refueling stop at our airport on a regular basis. It was a pain in the ass to refuel due to the very narrow track landing gear and the fuel tanks being on the wingtips. IIRC, only four of them were imported to the US. They used forward swept wings so that the wing spars passed behind the passenger compartment. Late in WWII, Junkers tested the Ju-287 bomber with forward swept wings. https://en.wikipedia.org/wiki/Junkers_Ju_287