Miloch <Miloch_member@newsguy.com> wrote in
news:pgg8g502dlc@drn.newsguy.com:
> https://en.wikipedia.org/wiki/Sukhoi_Su-47
>
> The Sukhoi Su-47 Berkut (Russian: ????? ??-47 ??????, lit. 'Golden
> Eagle') (NATO reporting name Firkin), also designated S-32 and S-37
> (not to be confused with the twin-engined delta canard design offered
> by Sukhoi in the early 1990s under the designation Su-37) during
> initial development, was an experimental supersonic jet fighter
> developed by Sukhoi Aviation Corporation. A distinguishing feature of
> the aircraft was its forward-swept wing that gave the aircraft
> excellent agility and maneuverability. While serial production of the
> type never materialized, the sole aircraft produced served as a
> technology demonstrator prototype for a number of advanced
> technologies later used in the 4.5 generation fighter SU-35BM and
> current fifth-generation jet fighter Sukhoi Su-57.
>
> The Su-47 is of similar dimensions to previous large Sukhoi fighters,
> such as the Su-35. To reduce development costs, the Su-47 borrowed the
> forward fuselage, vertical tails, and landing gear of the Su-27
> family. Nonetheless, the aircraft includes an internal weapons bay,
> and space set aside for an advanced radar.
>
> Though similar in overall concept to the Grumman X-29 research
> aircraft of the 1980s, the Su-47 is larger and far closer to an actual
> combat aircraft than its US counterpart.
>
> Like its immediate predecessor, the Su-37, the Su-47 is of
> tandem-triple layout, with canards ahead of wings and tailplanes.
> Interestingly, the Su-47 has two tailbooms of unequal length outboard
> of the exhaust nozzles. The shorter boom, on the left-hand side,
> houses rear-facing radar, while the longer boom houses a brake
> parachute.
>
> Role
> Experimental/Technology demonstrator
>
> Manufacturer
> Sukhoi
>
> First flight
> 25 September 1997
>
> Status
> Cancelled
>
> Primary user
> Russian Air Force
>
> Number built
> 1
>
> Maneuverability
>
> The Su-47 has extremely high agility at subsonic speeds, enabling the
> aircraft to alter its angle of attack and its flight path very quickly
> while retaining maneuverability in supersonic flight. The Su-47 has a
> maximum speed of Mach 1.6 at high altitudes and a 9g capability.
>
> The swept-forward wing, compared to a swept-back wing of the same
> area, provides a number of advantages:
>
> * higher lift-to-drag ratio
>
> * better agility in dogfight situations
>
> * higher range at subsonic speed
>
> * improved stall resistance and anti-spin characteristics
>
> * improved stability at high angles of attack
>
> * a lower minimum flight speed
>
> * a shorter take-off and landing distance
>
> The forward-swept midwing gives the Su-47 its unconventional
> appearance. A substantial part of the lift generated by the
> forward-swept wing occurs at the inner portion of the wingspan. This
> inboard lift is not restricted by wingtip stall and the lift-induced
> controllability of the aircraft is retained even in the event of
> airflow separating from the remainder of the wings' surface.
>
> A downside of such a forward-swept wing design is that it
> geometrically produces wing twisting as it bends under load, resulting
> in greater stress on the wing than for a similar straight or aft-swept
> to the geometric twisting. This is done by the use of composites wing
> skins laid-up to twist. The plane was initially limited to Mach 1.6.
>
>
> Specifications (Su-47)
>
> General characteristics
> Crew: 1
> Length: 22.6 m (74 ft 2 in)
> Wingspan: 15.16 m to 16.7 m (49 ft 9 in to 54 ft 9 in)
> Height: 6.3 m (20 ft 8 in)
> Empty weight: 16,375 kg (36,100 lbs)
> Loaded weight: 25,000 kg (55,115 lb)
> Max. takeoff weight: 35,000 kg (77,162 lb)
> (in PFU modification) turbofans Dry thrust: 83.4 kN (18,700 lbf) each
> Thrust with afterburner: 142.2 kN (32,000 lbf) each
>
> Performance
>
> Maximum speed: Mach 1.65 (Achieved in test flights) (1,717 km/h, 1,066
> mph)
> At sea level: Mach 1.16 (1,400 km/h, 870 mph)
> Range: 3,300 km (2,050 mi)
> Service ceiling: 18,000 m (59,050 ft)
> Rate of climb: 233 m/s (46,200 ft/min)
> Thrust/weight: 1.16 (loaded) / 1.77 (empty)
>
>
>
>
> *
>
>
Just for what it is worth, "Berkut" is
better translated to "Falcon." Makes you
wonder about the NATO name of Firkin.
And no. That didn't come from Google
Translate, though I will now go and check!
It came from a native Russkie.
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