Friday 8 January 2010

YAK 141 FREESTYLE, NEVER PRODUCED RUSSIAN SUPERSONIC VTOL




Yakoklev 141, NATO code named Freestyle. This innovative aircraft would have been the first supersonic VTOL fighter if it had reached Russian Navy service. Work began in 1975, but with budgetary and technical difficulties, particulary with the engine, delayed a first flight until March 1987, flown by Andrei Sinitsin.
The second prototype flew in April 1989, but crashed aboard the carrier Admiral Gorshkov in October 1991. During testing it several records for VTOL aircraft have created. Including a climbing speed record ( 116,5 seconds to 12,000 feet) and exactly his top speed to Mach 1,8.
For Russian aircraft, Yak 141 had more composites than other previous combat ones. There's up to 28% by weight being carbon fibre and remainder of the structure was mainly alumunium lithium alloys.
Development had virtually stopped by the time the Yak 141 appeared at the 1992 Farnborough Air Show. A land based STO/VL version was designed, but never developed. Now the surviving Yak 141 is in the Monino Air museum, Moscow. Russian was never being had the first operasional supersonic VTOL fighters. The US did finally wiyh his F35 JSF !
Yak 141 has a huge main vectored thrust turbofan engine assisted with 2 little lift turbofan only in Vertical take off or landing. That system finally has copied to F35 JSF when Yakoklev made some collaboration with Lockheed Martin. The partnership began in late 1991, though it was not publicly revealed by Yakovlev until 6 September 1992, and was not revealed by Lockheed-Martin until June 1994. Its swivelling main engine nozzle and automatic vertical Takeoff/landing assisted computer system have believed inspirating any F35 JSF aircraft programs.



Specifications (Yak-41)

General characteristics

  • Crew: one: pilot
  • Length: 18.36 m (60 ft 2 1/4 in)
  • Wingspan: 10.105 m (33 ft 1 1/2 in)
  • Height: 5.00 m (16 ft 5 in)
  • Wing area: 31.7 m² (341 ft²)
  • Empty weight: 11,650 kg (25,683 lb)
  • Max takeoff weight: 19,500 kg (42,989 lb)
  • Powerplant:MNPK Soyuz R-79V-300 lift/cruise turbofan
    • Dry thrust: 108 kN (24,300 lbf)
    • Thrust with afterburner: 152 kN (34,170 lbf
  • Lift engines: 2x RKBM RD-41 turbojets 41.7 kN (9,300 lbf) thrust each)

Performance

Armament


Thursday 7 January 2010

NORTHROP YF-23, NOT TO GOOD FOR BEAT F22




The Northrop/McDonnell Douglas YF-23 was an American prototype fighter aircraft designed for the United States Air Force. The YF-23 was entered in Advanced Tactical Fighter competition but lost out to the Lockheed YF-22, which entered production as the F-22 Raptor.
It's was a big shock to Northrop that have just cut off the contract of B-2 Spirit Stealth bomber !

Design and development

The YF-22 and YF-23 were competing in the USAF's Advanced Tactical Fighter (ATF) program, conceived in the early 1980s, to provide a replacement for the F-15 Eagle. Contracts for the two most promising designs were awarded in 1986.

The YF-23 was designed to meet USAF requirements for survivability, supersonic cruise (supercruise), stealth, and ease of maintenance. Designed with all-aspect stealth as a high priority, Northrop drew on the company's experience with the B-2 Spirit and F/A-18 Hornet. The YF-23 was an unconventional-looking aircraft with trapezoidal wings, substantial area-ruling, and a V-tail. Similar to the B-2, the exhaust from the YF-23's engines flows through troughs lined with heat ablating tiles, which shields the exhaust from infrared (IR) missile detection from below. The vehicle management system coordinates movements of the control surfaces for maneuvers and for stable flight, along with other aircraft functions. The wing flaps and ailerons deflect inversely on either side to provide roll. Pitch was provided by movement of both V-tails, and yaw was supplied but opposite movement. Deflecting the wing flaps down and ailerons up on both sides simultaneously provided for aerodynamic braking.

Although possessing an advanced design, in order to reduce costs and development, a number of F-15 Eagle components were utilized including the standard F-15 nose wheel unit and the forward cockpit of the F-15E Strike Eagle. Two aircraft were built. YF-23 #1 (PAV-1) was fitted with Pratt & Whitney YF119 engines, while YF-23 #2 (PAV-2) was fitted with General Electric YF120 engines. The YF-23 featured fixed nozzles. The first YF-23 was rolled out on 22 June 1990,[5] and first flew on 27 August 1990. YF-23 #2 first flew on 26 October 1990.

The black YF-23 (PAV-1) was nicknamed "Black Widow II", after the Northrop P-61 Black Widow of World War II and had a red hourglass marking resembling the underbelly marking of the black widow spider. The black widow marking was briefly seen under PAV-1 before being removed at the insistence of Northrop management. The gray colored YF-23 (PAV-2) was nicknamed "Gray Ghost".

Evaluation

Both YF-23s were furnished in the configuration specified before the requirement for thrust reversing was dropped. The weapons bay was configured for weapons launch but no missiles were fired, unlike Lockheed's demonstration aircraft. The YF-23s flew 50 times for a total of 65.2 hours. The first YF-23 with P&W engines supercruised at Mach 1.43 on 18 September 1990 and the second YF-23 with GE engines reached Mach 1.6 on 29 November 1990. For comparison, the YF-22 achieved Mach 1.58 in supercruise. The flight testing demonstrated Northrop's predicted performance values for the YF-23.

The YF-22 won the competition in April 1991. The YF-23 design was more stealthy and faster, but the YF-22 was more agile. It has been speculated in the aviation press that the YF-22 was also seen as more adaptable to the Navy's Navalized Advanced Tactical Fighter (NATF), though as it turned out the US Navy abandoned NATF a few months later.

After losing the competition, both YF-23s were transferred to NASA's Dryden Flight Research Center, at Edwards AFB, California without the engines. NASA planned to use one of the aircraft to study strain gauge loads calibration techniques, but this did not occur.

Possible revival

In late 2004, Northrop Grumman proposed a YF-23 based design for the USAF's interim bomber requirement, a role for which the FB-22 and B-1R are also competing.Aircraft PAV-2 was modified by Northrop as a full size model of its proposed interim bomber. The interim bomber requirement has since been canceled in favor of a more long-term, bomber replacement requirement. The same YF-23-derived design could possibly be adapted to fulfill this role as well. However, it appears the possibility of a YF-23-based interim bomber was ended with the 2006 Quadrennial Defense Review, in lieu of a long range bomber with a much greater range.

Survivors

Both airframes remained in storage until mid-1996, when the aircraft were transferred to museums.

  • Aircraft PAV-2 was on exhibit at the Western Museum of Flight in Hawthorne, California. In 2004, it was loaned to Northrop Grumman and used for display purposes.Eventually, the aircraft will return to the museum's new location at Torrance Airport, Torrance, CA.

Specifications (YF-23)

General characteristics

Performance

Armament

(WIKIPEDIA)

STOPPRESS 2 : BUKU-BUKU SECOND



SERIAL OSPREY :

1ST AIR CAVALRY IN VIETNAM (KONDISI 80%)
120AN HALAMAN
HARGA RP. 70.000,00 DENGAN ONGKOS KIRIM RP. 8000,00
PELELIU 1944, FORGOTTEN CORNER OF HELL (KONDISIS 90%)
120AN HALAMAN
HARGA RP. 85.000,00 DENGAN ONGKOS KIRIM RP. 8000,00

SERIAL HAMLYN PERANG DUNIA 2 :

AMERICAN AIRCRAFT OF WW2 (KONDISI 90%, 133 PESAWAT, 170 COLOUR DRAWINGS)
PENGARANG DAVID MONDEY, 230AN HALAMAN
HARGA RP. 120.000,00 DENGAN ONGKOS KIRIM RP. 15.000,00
BRITISH AIRCRAFT OF WW2 (KONDISI 90%, 113 PESAWAT, 204 COLOUR DRAWINGS)
PENGARANG DAVID MONDEY, 230AN HALAMAN
HARGA RP.120.000,00 DENGAN ONGKOS KIRIM RP. 15.000,00

FAMOUS OF PERANG DUNIA 2 :

BAND OF BROTHERS (KONDISI 90%)
PENGARANG STEPHEN E. AMBROSE, TERJEMAHAN PENERBIT OBOR
HARGA RP. 70.000,00 DENGAN ONGKOS KIRIM RP. 20.000,00
BAND OF BROTHERS SERIAL VCD ORIGINAL (KONDISI 90%, LENGKAP 12 DISC)
DENGAN TERJEMAHAN INDONESIA
HARGA RP. 120.000,00 DENGAN ONGKOS KIRIM RP. 20.000,00
YEAGER (BUKU LAMA KONDISI 70%)
OTOBIOGRAFI GEN. CHUCK E. YEAGER. PENGARANG LEO JANOS, INSPIRASI FILM "RIGHT STUFF"
KIRA-KIRA 300AN HALAMAN, SOFT COVER
HARGA RP. 100.000,00 DENGAN ONGKOS KIRIM RP. 20.000

CARA MENDAPATKAN :

1. TRANSFER UANG KE REKENING MANDIRI CAB. SURAKARTA SLAMET RIYADI
NO. REKENING : 138-00-0441805-4
ATAS NAMA : ARISTOTELES WIRAWAN ADHIDARMA, ST

2. SETELAH TRANSFER KIRIM SMS KE NOMOR CONTACT KAMI : NAMA, ALAMAT POS &
BUKU-BUKU YANG DIPESAN.
NOMOR CONTACT HP KAMI : 0813 2964 3910
ATAU EMAIL KAMI DI : ARISWIRA@GMAIL.COM
3. SEGERA SETELAH TRANSFER & SMS DITERIMA MAKA KAMI SEGERA KIRIM BUKU
TERSEBUT KE ALAMAT SAUDARA. PENGIRIMAN PALING LAMBAT DITERIMA 1 MINGGU SAMPAI 10 HARI SETELAH TRANSFER PEMESANAN.

STOP PRESS 1 : JUAL KOLEKSI ANGKASA SECOND

EDISI KOLEKSI ANGKASA LAMA :

Pesawat Tempur Sepanjang Masa (kondisi 70% sayang bonus posternya nggak ada)
Harga : Rp. 40.000,00 + ongkos kirim Rp. 8.000,00
Sukhoi (kondisi 60%)
Harga : 40.000,00 + onglos kirim Rp. 8.000,00
The Great Naval Warfare (kondisi 90%)
Harga : Rp. 30.000,00 + onglos kirim Rp. 8.000,00
Artillery, The King of Battle (kondisi 90%)
Harga : Rp. 25.000,00 + onglos kirim Rp. 8.000,00



EDISI KOLEKSI ANGKASA AGAK BARU (TENTANG PERANG) :

THE NAZI WAR MACHINES (+BONUS, KONDISI 90%)
NAZI'S SPECIAL FORCES (KONDISI 90%)
PERANG ASIA TIMUR RAYA 1 (KONDISI 90%)
PERANG ASIA TIMUR RAYA 2 (KONDISI 90%)
FORGOTTEN WAR, PERANG KOREA (KONDISI 90%)
THE GREAT WAR, WW1 (KONDISI 90%)
WAR PILOTS (KONDISI 90%)
PERANG UDARA DI ATAS VIETNAM (KONDISI 90%)
VIETNAM WAR (KONDISI 90%)
THE YOM KIPPUR WAR (KONDISI 90%)
Harga per buku Rp. 25.000,00 + ongkos kirim Rp. 8.000



EDISI ANGKASA AGAK BARU (TENTANG ALUTSISTA) :


RUDAL UDARA (KONDISI 90%)
MOST FAMOUS JETFIGHTERS (KONDISI 90%)
ALUTSISTA DALAM NEGERI (KONDISI 90%)
KAPAL PERANG INDONESIA (KONDISI 90%)
ILLUSTRATED HISTORY OF DEADLY WEAPONS (KONDISI 90%)
PISTOL & REVOLVER (KONDISI 90%)
Harga per buku Rp. 25.000,00 + ongkos kirim Rp. 8.000


DISCOUNT PENGIRIMAN :

UNTUK PEMBELIAN DIATAS 5 BUAH BUKU MAKA ONGKOS KIRIM DIPOTONG RP. 5.000,00 MENJADI HANYA RP. 35.000.00 SAJA DEMIKIAN SETERUSNYA KELIPATANNYA.

CARA MENDAPATKAN :


1. TRANSFER UANG KE REKENING MANDIRI CAB. SURAKARTA SLAMET RIYADI
NO. REKENING : 138-00-0441805-4
ATAS NAMA : ARISTOTELES WIRAWAN ADHIDARMA, ST

2. SETELAH TRANSFER KIRIM SMS KE NOMOR CONTACT KAMI : NAMA, ALAMAT POS &
BUKU-BUKU YANG DIPESAN.
NOMOR CONTACT HP KAMI : 0813 2964 3910
ATAU EMAIL KAMI DI : ARISWIRA@GMAIL.COM
3. SEGERA SETELAH TRANSFER & SMS DITERIMA MAKA KAMI SEGERA KIRIM BUKU
TERSEBUT KE ALAMAT SAUDARA. PENGIRIMAN PALING LAMBAT DITERIMA 1 MINGGU SAMPAI 10 HARI SETELAH TRANSFER PEMESANAN.