Sukhoi's T-50 in the climb.

T-50-1 on its maiden flight from Komsomolsk-on-Amur plant on January 29, 2009.

The main landing gear in the final moment of the retraction sequence.

T-50-1 on final approach to Komsomolsk-on-Amur. The right side oblong under wing fairing is easily seen, near the fuselage.

A good view of the form of the upper fuselage and the forward form of the wing.

The maximum size of weapon to be carried inside the weapon bays is 4,200 x 400 x 400mm (165 x 16 x 16 inches) and these are the exact dimensions of the new modular Kh-38M air-to-ground missile with folded wings and fins. Several seekers are available for the Kh-38M including semi-active laser, active radar, and infrared as well as a satellite navigation receiver. A Kh-38M weighs up to 520kg (235lb) including a 250kg (114lb) warhead. The missile's maximum range is 40km (25 miles).

Good rear view shot of T-50-1.

PAK FA prototype T-50-1 makes a spirited departure from the runway at Zhukovsky.

The T-50's tandem internal weapon bays can clearly be seen under the fuselage extending from a forward point adjacent the engine inlets to the engine nozzles.

Seconds from touch down at Zhukovsky, this view of the T-50-1 shows the small single piece vertical tail surfaces set at an obtuse angle of 26°.

Two drag chutes help to slow T-50-1 on roll-out after landing on the runway at Komsomolsk-on-Amur following the type's maiden flight on January 29, 2009.

The Raduga missile design bureau miniaturized its Kh-58 anti-radar missile (above) into the Kh-58UShK version (below) to fit inside the PAK FA's internal bay.

Forward stretched wing-root extensions have large moving flaps on the leading edge, and are connected with the wings by elastic couplings.

Putin views his latest mount.

A test pilot climbs into the cockpit of T-50-1 at Zhukovsky on June 17 for a demonstration flight for the Prime Minister of Russia Vladimir Putin.

Yuri Belyi, head of the NIIP radar design bureau (right) and Anatoly Sinani, head of the antenna division at NIIP together with the first test example of a front AESA antenna for the Sh 121 radar system.

Computer-generated image of the PAK FA's cockpit.

A drawing from Vympel of the UVKU (Unifitsirovannoye Vnutrifyuzelazhnoye Katapultnoye Ustroystvo) unified internal catapult launcher.

1. NIIP Sh121 radar system will have five active electronic-scanning aerials including a forward-looking X-band aerial in the nose. 2. Most probably, this plate covers side-looking X-band radar of the Sh121 system. 3. L-band radar antenna in the front part of wing's nose flap. 4. Forward looking electro-optical sight. 5. Upper-hemisphere EO device. 6. Long tail beam protruding between the engines nozzles contains two brake chutes. Sukhoi designers insist that no rear-looking radar is planned for the PAK FA. 7. Huge wing root extension with large leading-edge flaps connected with the wings by elastic couplings. 8. Small all-moving tailfins are deflected by 26° aside. 9. All-moving tail planes (as well as tailfins) are fitted to large carrying beams. 10. Two-section flaperon. 11. Single-barrel 30mm cannon. 12. Flight refuelling probe. 13. Each of these two large weapon bays inside the fuselage could fit two large air-to-air or air-to-surface missiles; note 'stealth' tooth-shaped doors of these compartments as well as the landing gear compartment in front. 14. 'Quick bay' for single close-air combat air-to-air missile. 15. Fittings for weapon/stores pylons, two under each wing. 16. These are empty places on the T-50-1 prototype but probably chaff and flare dispensers will be located here in the future. 17. Two Saturn AL-41F1 (117) thrust-vectoring turbofans rated at 15 tons (147kN/33,046lb) each