Skip to main content

Fixed Wing Collection

Background imageFixed Wing Collection: ATR 72-212 G-OILA

ATR 72-212 G-OILA (msn 472), of British World Airlines. Date: circa 1998

Background imageFixed Wing Collection: Morane-Saulnier MS.505 Criquet G-BPHZ

Morane-Saulnier MS.505 Criquet G-BPHZ (msn 53/7)

Background imageFixed Wing Collection: General Dynamics F-16A Fighting Falcon J-135

General Dynamics F-16A Fighting Falcon J-135
Koninklijke Luchtmacht - General Dynamics F-16A Fighting Falcon J-135 (msn 6D-125), of 315 Squadron. (Koninklijke Luchtmacht - Royal Netherlands Air Force). Date: circa 1990

Background imageFixed Wing Collection: English Electric Canberra B.6 (mod) XH568

English Electric Canberra B.6 (mod) XH568
Royal Aircraft Establishment - English Electric Canberra B.6 (mod) XH568 (msn 71105) Date: circa 1985

Background imageFixed Wing Collection: Grumman A-6E Intruder 155715 & Grumman TC-4A Academe 155729

Grumman A-6E Intruder 155715 & Grumman TC-4A Academe 155729
United States Navy - Grumman A-6E Intruder 155715 (MSN I-441), of VA-165. With Grumman TC-4A Academe 155729 (MSN 186). Date: circa 1980

Background imageFixed Wing Collection: Cessna A-37B Dragonfly 71-0867 - 'IY'

Cessna A-37B Dragonfly 71-0867 - 'IY'
United States Air Force - Cessna A-37B Dragonfly 71-0867 / 'IY' (MSN 43405), of the 757th SOS. Later delivered to Colombia as FAC 2171. Date: circa 1975

Background imageFixed Wing Collection: Lockheed KC-130F Hercules 150690

Lockheed KC-130F Hercules 150690
United States Marine Corps - Lockheed KC-130F Hercules 150690 'Fat Albert' (MSN 282-3742), of VMGR-252 and the Blue Angels formation aerobatic team. Date: circa 1972

Background imageFixed Wing Collection: Boeing B-17G Flying Fortress N3713G - 44-83684

Boeing B-17G Flying Fortress N3713G - 44-83684
Boeing B-17G Flying Fortress N3713G / 44-83684 (MSN 32325), of the Planes of Fame Museum at Chino, California. Date: circa 1970

Background imageFixed Wing Collection: Vega B-17G-100-VE Flying Fortress F-BEEA

Vega B-17G-100-VE Flying Fortress F-BEEA
Institut Geographique National - Vega B-17G-100-VE Flying Fortress F-BEEA (msn 8552, ex 44-85643), at Creil. Date: circa 1966

Background imageFixed Wing Collection: Boeing 707-321 N714PA

Boeing 707-321 N714PA 'Clipper Golden Eagle' (msn 17592 / 13), of Pan American Airways (PAA / Pan Am) Date: circa 1966

Background imageFixed Wing Collection: de Havilland DH.106 Comet 4C 9K-ACA

de Havilland DH.106 Comet 4C 9K-ACA (msn 06465), of Kuwait Airways at London Heathrow Airport. Date: circa 1966

Background imageFixed Wing Collection: Douglas TA-3B Skywarrior 144856

Douglas TA-3B Skywarrior 144856
United States Navy - Douglas TA-3B Skywarrior 144856 (MSN 12102, pre 1962 A3D-2T), of VAH-123. Date: circa 1966

Background imageFixed Wing Collection: Grumman S2F-1 Tracker 133103

Grumman S2F-1 Tracker 133103
United States Navy - Grumman S2F-1 Tracker 133103 (MSN 74) Date: circa 1965

Background imageFixed Wing Collection: Grumman S-2A Tracker 136512

Grumman S-2A Tracker 136512
United States Navy - Grumman S-2A Tracker 136512 (MSN 421) Date: circa 1965

Background imageFixed Wing Collection: Grumman US-2C Tracker 133360

Grumman US-2C Tracker 133360
United States Navy - Grumman US-2C Tracker 133360 (msn N-32), of VU-7. The sixty S2F-2 (S-2C) Trackers were built to carry the MK-90 nuclear depth charge in an enlarged weapon bay

Background imageFixed Wing Collection: Boeing KC-97L Stratofreighter 53-0218

Boeing KC-97L Stratofreighter 53-0218
United States Air Force - Boeing KC-97L Stratofreighter 53-0218 (MSN 17000), of the 151st Military Airlift Group, 191st Air Refuelling Squadron, Utah Air National Guard. Date: circa 1962

Background imageFixed Wing Collection: Gloster Meteor F.8 VZ473

Gloster Meteor F.8 VZ473, fitted with a Meteor PR.10 nose at Stansted Fire School. (note: the nose sections of the F.8, FR.9 and PR.10 were interchangeable). Date: circa 1960

Background imageFixed Wing Collection: Sikorsky YHSS-2 Sea King 148041

Sikorsky YHSS-2 Sea King 148041
United States Navy - Sikorsky YHSS-2 Sea King 148041 (MSN 61019), at Le Bourget Airport for a Paris Air Show. Date: circa 1960

Background imageFixed Wing Collection: Scottish Aviation Twin Pioneer EP-AGA

Scottish Aviation Twin Pioneer EP-AGA (msn 516), of the Iranian Civil Flight, outside the Scottish Aviation flight-test hangar at Prestwick airport. Date: circa 1960

Background imageFixed Wing Collection: Scottish Aviation Twin Pioneer EP-AGB

Scottish Aviation Twin Pioneer EP-AGB (msn 513), of the Iranian Civil Flight, outside the Scottish Aviation flight-test hangar at Prestwick airport. Date: circa 1960

Background imageFixed Wing Collection: Thruxton Jackaroo G-AOEX

Thruxton Jackaroo G-AOEX. The Jackaroo was a four-seat conversion of the de Havilland DH.82A Tiger Moth. Date: circa 1960

Background imageFixed Wing Collection: American Flea TC-1 Triplane N5748N

American Flea TC-1 Triplane N5748N Date: circa 1960

Background imageFixed Wing Collection: Lockheed VC-121G Constellation 54-4051

Lockheed VC-121G Constellation 54-4051
United States Air Force - Lockheed VC-121G Constellation 54-4051 (MSN 1049B-4105, ex R7O-1 128438) Date: circa 1960

Background imageFixed Wing Collection: Boeing C-97G Stratofreighter 52-0927

Boeing C-97G Stratofreighter 52-0927
United States Air Force - Boeing C-97G Stratofreighter 52-0927 (msn 16621), of Tennessee Air National Guard. Date: circa 1960

Background imageFixed Wing Collection: Grumman SA-16A Albatross 51-0059

Grumman SA-16A Albatross 51-0059
United States Air Force - Grumman SA-16A Albatross 51-0059 (msn 722), of the 67th ARS, Date: circa 1958

Background imageFixed Wing Collection: Avro Shackleton MR.1A WB836

Avro Shackleton MR.1A WB836
Royal Air Force - Avro Shackleton MR.1A WB836, of No.220 Squadron at the Avro factory on Langar airfield. Date: circa 1957

Background imageFixed Wing Collection: Grumman G-36A Martlet I AL246

Grumman G-36A Martlet I AL246 (msn 656), at Loughborough College. Date: circa 1955

Background imageFixed Wing Collection: Vickers Valetta C.1 VW188

Vickers Valetta C.1 VW188
Royal Air Force - Vickers Valetta C.1 VW188 (msn 344), at RAF Little Rissington. (Little Rissington remains the highest active airfield in the UK) Date: circa 1955

Background imageFixed Wing Collection: de Havilland DH.104 Dove AP-AGJ

de Havilland DH.104 Dove AP-AGJ
de Havilland DH.104 Dove 2B AP-AGJ (msn 04084), of the Pakistan Petroleum Company Date: circa 1953

Background imageFixed Wing Collection: Aquaflight W-6A Aqua II N74141

Aquaflight W-6A Aqua II N74141, put out to grass after flight testing interrupted. Date: circa 1952

Background imageFixed Wing Collection: Saunders Roe SR.A/1 TG263

Saunders Roe SR.A/1 TG263 flying boat jet fighter. Date: circa 1952

Background imageFixed Wing Collection: Aeronca L-16A Grasshopper 47-0945

Aeronca L-16A Grasshopper 47-0945
United States Air Force - Aeronca L-16A Grasshopper 47-0945, of the Civil Air Patrol Date: circa 1950

Background imageFixed Wing Collection: Stearman-Hammond Y-1S NC15521

Stearman-Hammond Y-1S NC15521 (msn 306). Date: circa 1939

Background imageFixed Wing Collection: Bucker Bu 181B Bestmann G-GLSU - GL+SU

Bucker Bu 181B Bestmann G-GLSU - GL+SU
Bucker Bu 181B-1 Bestmann G-GLSU / GL+SU (Werknummer 25071). Date: circa 2000

Background imageFixed Wing Collection: Boeing EC-135K 59-1518

Boeing EC-135K 59-1518
United States Air Force - Boeing EC-135K 59-1518 (MSN 18006), at Davis-Monthan AFB for storage and disposal, on 25 April 2003. Date: 2003

Background imageFixed Wing Collection: McDonnell F-4D Phantom N749CF - 64-0749 - '66-7463'

McDonnell F-4D Phantom N749CF - 64-0749 - '66-7463'
McDonnell F-4D-28-MC Phantom N749CF / 64-0749 / '66-7463' (msn 868), of the Collings Foundation at Scottsdale on 21 October 2000

Background imageFixed Wing Collection: Lockheed ES-3A Shadow 159393

Lockheed ES-3A Shadow 159393
United States Navy - Lockheed ES-3A Shadow 159393 (MSN 394A-1029), formerly of VQ-5 Det.14, at Davis-Monthan AFB on 6 February 1999, for disposal. Date: 1999

Background imageFixed Wing Collection: McDonnell Douglas QF-4E Phantom 66-0338

McDonnell Douglas QF-4E Phantom 66-0338
United States Air Force - McDonnell Douglas QF-4E Phantom 66-0338 (msn ), of the 475th WEG, at Tyndall AFB on 22 October 1998 Date: 1998

Background imageFixed Wing Collection: General Dynamics F-16B Fighting Falcon 93-0825

General Dynamics F-16B Fighting Falcon 93-0825
United States Air Force - General Dynamics F-16B Fighting Falcon 93-0825 (MSN TB-4) of the 21st FS, 56th FW, at Luke AFB on 14 December 1996

Background imageFixed Wing Collection: Grumman A-6E Intruder 155683

Grumman A-6E Intruder 155683
United States Navy - Grumman A-6E Intruder 155683, formerly of VA-34, at Davis-Monthan AFB for storage and disposal on 5 October 1996. Date: 1996

Background imageFixed Wing Collection: General Dynamics F-16C Fighting Falcon 88-0471

General Dynamics F-16C Fighting Falcon 88-0471
United States Air Force - General Dynamics F-16C Block 40C Fighting Falcon 88-0471 (msn 1C-73, base code 'LF'), of the 421st Fighter Squadron, 388th Fighter Wing, at Luke Air Force Base

Background imageFixed Wing Collection: Grumman A-6E Intruder 152642

Grumman A-6E Intruder 152642
United States Navy - Grumman A-6E Intruder 152642 (MSN I-190), formerly of of VA-123 at Davis-Monthan AFB for storage and disposal, on 16 September 1995. Date: 1995

Background imageFixed Wing Collection: United States Navy - Grumman A-6E Intruder 152925 (MSN I-229)

United States Navy - Grumman A-6E Intruder 152925 (MSN I-229), formerly of of VA-145 at Davis-Monthan AFB for storage and disposal, on 22 January 1994. Date: 1994

Background imageFixed Wing Collection: McDonnell Douglas AV-8B Harrier II 163855

McDonnell Douglas AV-8B Harrier II 163855
United States Marine Corps - McDonnell Douglas AV-8B-13-MC Harrier II 163855 (MSN 169), of VMA-311 at Luke AFB on 27 June 1993. Date: 1993

Background imageFixed Wing Collection: Fairchild-Republic A-10A 78-0700

Fairchild-Republic A-10A 78-0700
United States Air Force - Fairchild-Republic A-10A Thunderbolt II 78-0700 (MSN A10-0320), of the 46th TFS, at Robins AFB on 25 October 1991. Date: 1991

Background imageFixed Wing Collection: General Dynamics F-16A Fighting Falcon 82-0929

General Dynamics F-16A Fighting Falcon 82-0929
United States Air Force - General Dynamics F-16A Block 15K Fighting Falcon 82-0929 (MSN 6I-522), of the 178th TFS, North Dakota Air National Guard, at Fargo on 16 October 1991. Date: 1991

Background imageFixed Wing Collection: McDonnell F-4E Phantom 74-1049

McDonnell F-4E Phantom 74-1049
United States Air Force - McDonnell F-4E-60-MC Phantom 74-1049 (MSN 4832), formerly of the 35th TFW, at Davis-Monthan AFB on 21 November 1991 for storage and disposal, Date: 1991

Background imageFixed Wing Collection: McDonnell Douglas F-15A Eagle 75-0068

McDonnell Douglas F-15A Eagle 75-0068
United States Air Force - McDonnell Douglas F-15A-14-MC Eagle 75-0068 (MSN 0172/A148), of the 128th TFS Georgia ANG, at Shaw AFB on 28 October 1987. Date: 1987

Background imageFixed Wing Collection: Rockwell OV-10A Bronco 67-14608

Rockwell OV-10A Bronco 67-14608
United States Air Force - Rockwell OV-10A Bronco 67-14608 (MSN 305A-16), ot the 549th TATS, at Shaw AFB on 15 November 1984. Date: 1984

Background imageFixed Wing Collection: Breguet Atlantic 61+13

Breguet Atlantic 61+13
Marineflieger - Breguet Atlantic 61+13, (msn 26) of MFG 3, at RAF Greenham Common for the International Air Tattoo in July 1983. Date: 1983

Background imageFixed Wing Collection: Grumman A-6E Intruder 149953

Grumman A-6E Intruder 149953
United States Navy - Grumman A-6E Intruder 149953 (MSN I-34), of VA-34, range on the deck of USS America on12 September 1982 whilst moored in the Firth of Forth. Date: 1982

Background imageFixed Wing Collection: LTV A-7D Corsair II 70-0988

LTV A-7D Corsair II 70-0988
United States Air Force - Ling-Temco-Vought A-7D-8-CV Corsair II 70-0988 (MSN D-134), of the 188th TFS, New Mexico ANG, at Shaw AFB on 23 February 1982. Date: 1982

Background imageFixed Wing Collection: Hawker Siddeley AV-8A Harrier 158963

Hawker Siddeley AV-8A Harrier 158963
United States Marine Corps - Hawker Siddeley AV-8A Harrier 158963 (MSN 712124), of VMA-231, on USS Inchon in Rotterdam Harbour, 27 March 1982. Date: 1982

Background imageFixed Wing Collection: Lockheed C-130H Hercules MM61998 - 46-12

Lockheed C-130H Hercules MM61998 - 46-12
Aeronautica Militaire - Lockheed C-130H Hercules MM61998 / 46-12 (msn 382-4052), of 46 Aero Brigata at Pope AFB on 9 June 1981. (Aeronautica Militaire - Italian Air Force) Date: 1981

Background imageFixed Wing Collection: Lockheed C-130H Hercules NZ7001

Lockheed C-130H Hercules NZ7001
Royal New Zealand Air Force - Lockheed C-130H Hercules NZ7001 (msn 382-4052), of 40 Squadron at Pope AFB on 9 June 1981. Date: 1981

Background imageFixed Wing Collection: Lockheed C-5A Galaxy 69-0019

Lockheed C-5A Galaxy 69-0019
United States Air Force - Lockheed C-5A Galaxy 69-0019 (MSN 500-0050), of the 436th MAW at RAF Greenham Common for the International Air Tattoo on 27 June 1981. Date: 1981

Background imageFixed Wing Collection: McDonnell F-4C Phantom 64-0655

McDonnell F-4C Phantom 64-0655
United States Air Force - McDonnell F-4C-21-MC Phantom 64-0655 (msn 868), of the 93rd TFS at Homestead AFB on 15 November 1980, Date: 1980

Background imageFixed Wing Collection: Lockheed C-130H Hercules NZ7001

Lockheed C-130H Hercules NZ7001
Royal New Zealand Air Force - Lockheed C-130H Hercules NZ7001 (msn 382-4052), of 40 Squadron on 'C-130 row' at a very soggy RAF Greenham Common for the International Air Tattoo on 23 June 1979 Date

Background imageFixed Wing Collection: Lockheed C-130A Hercules 55-0023

Lockheed C-130A Hercules 55-0023
United States Air Force - Lockheed C-130A Hercules 55-0023 (MSN 182-3050), of the 64th Tactical Airlift Squadron, 928th Airlift Wing at RAF Greenham Common for the International Air Tattoo on 23 June

Background imageFixed Wing Collection: Grumman A-6E Intruder 151802

Grumman A-6E Intruder 151802
United States Navy - Grumman A-6E Intruder 151802 (MSN I-105), of VA-34 embarked on USS John F. Kennedy, seen at RAF Mildenhall Air Fete on 31 May 1977. Date: 1977

Background imageFixed Wing Collection: McDonnell Douglas F-4F Phantom 38+30

McDonnell Douglas F-4F Phantom 38+30
Luftwaffe - McDonnell Douglas F-4F Phantom 38+30 (msn 4695), of JB 35 at RAF Greenham Common for the International Air Tattoo on 31 June 1976 Date: 1976

Background imageFixed Wing Collection: Grumman HU-16E Albatross 7254

Grumman HU-16E Albatross 7254
United States Coast Guard - Grumman HU-16E Albatross 7254 (MSN 345, ex 51-7254), based at USCGAS Cape Cod, seen at Otis AFB on 15 May 1976. Date: 1976

Background imageFixed Wing Collection: Hawker Siddeley Sea Vixen FAW.2 8145M - XJ526 - '38'

Hawker Siddeley Sea Vixen FAW.2 8145M - XJ526 - '38'
Royal Air Force - Hawker Siddeley Sea Vixen FAW.2 8145M / XJ526 / '38' (msn 10035), at RAF Halton on 29 June 1974. Date: 1974

Background imageFixed Wing Collection: Handley Page Hastings C.2 WD480

Handley Page Hastings C.2 WD480
Royal Aircraft Establishment - Handley Page Hastings C.2 WD480, at RAF Abingdon on 15 September 1973. WD480 was fitted with a large pannier housing sonobuoy bays

Background imageFixed Wing Collection: Lockheed SP-2H Neptune 145910

Lockheed SP-2H Neptune 145910
United States Navy - Lockheed SP-2H Neptune 145910 (MSN 726-7172), of VP-45 at Point Mugu NAS on 28 October 1973. Date: 1973

Background imageFixed Wing Collection: de Havilland DHC-2 Beaver AL.1 XP827

de Havilland DHC-2 Beaver AL.1 XP827
Army Air Corps - de Havilland Canada DHC-2 Beaver AL.1 XP827 (msn 1495), of 15 Flight, at RAF St.Athan in September 1973. Date: 1973

Background imageFixed Wing Collection: Grumman E-1B Tracer 147231

Grumman E-1B Tracer 147231
United States Navy - Grumman E-1B Tracer 147231 (MSN 30, Model G-111), of VAW-121, ranged on the deck of USS Intrepid, moored in Portsmouth Harbour on 10 September 1972. Date: 1972

Background imageFixed Wing Collection: Douglas NA-3A Skywarrior 135609

Douglas NA-3A Skywarrior 135609
United States Navy - Douglas NA-3A Skywarrior 135609 (MSN 10302), of the Pacific Missile Test Center (PMTC) at Point Mugu in October 1971. Date: 1971

Background imageFixed Wing Collection: Saab J-35XD A-002

Saab J-35XD A-002
Flyvevabnet - Saab J-35XD A-002 (msn 35-1002), of 723 Esk, at North Weald on 31 May 1971. (Flyvevabnet - Royal Danish Air Force). Date: 1971

Background imageFixed Wing Collection: Grumman C-1A Trader 146050

Grumman C-1A Trader 146050
United States Navy - Grumman C-1A Trader 146050 (MSN 80), of VRC-40, at RAF Leuchars on 5 October 1971. Date: 1971

Background imageFixed Wing Collection: Grumman S-2E Tracker 152348

Grumman S-2E Tracker 152348
United States Navy - Grumman S-2E Tracker 152348 (MSN 235C), of VS-27, on USS Intrepid in Portsmouth Harbour, 11 September 1971. Date: 1971

Background imageFixed Wing Collection: Fiat G-91T M6343 - SA-43

Fiat G-91T M6343 - SA-43
Aeronautica Militaire - Fiat G-91T MM6343 / SA-43 (msn 73), at RAF Luqa on 4 July 1970. (Aeronautica Militaire - Italian Air Force) Date: 1970

Background imageFixed Wing Collection: Vought F-8 SCW 810 - N810NA - 141353

Vought F-8 SCW 810 - N810NA - 141353
NASA - Vought F-8 SCW 810 / N810NA / 141353 (msn 23), fitted with Richard Whitcomb;s Supercritical wing, to investigate drag in the transonic region. Date: 1970

Background imageFixed Wing Collection: BAC Lightning T.5 XS417 - 'Z'

BAC Lightning T.5 XS417 - 'Z'
Royal Air Force - BAC Lightning T.5 XS417 / 'Z' (msn B1/95002), of No.23 Squadron at RAF Leuchars on 20 September 1969. Date: 1969

Background imageFixed Wing Collection: Hawker Hunter FGA.9 XJ635 - 'G'

Hawker Hunter FGA.9 XJ635 - 'G'
Royal Air Force - Hawker Hunter FGA.9 XJ635 / 'G' (msn 41H-688052), of No.54 Squadron at RAF Valley on 10 August 1968. Date: 1968

Background imageFixed Wing Collection: North American RA-5C Vigilante 146701

North American RA-5C Vigilante 146701
United States Navy - North American RA-5C Vigilante 146701 (MSN NA247-10), of RVAH-9, waiting for the catapult on USS Saratoga, somewhere in the Mediterranean Sea in July 1967

Background imageFixed Wing Collection: BAC Lightning F.6 XS923 - 'C'

BAC Lightning F.6 XS923 - 'C'
Royal Air Force - BAC Lightning F.6 XS923 / 'C' (msn 95256), of No.5 Squadron at RAF Binbrook on 15 November 1967. Date: 1967

Background imageFixed Wing Collection: Saab J 29F Tunnan 29432 - '06'

Saab J 29F Tunnan 29432 - '06'
Flygvapnet - Saab J 29F Tunnan 29432 / '06', formerly of F3 Wing, at Malmslatt awaiting disposal on 23 September 1967. (Flygvapnet - Royal Swedish Air Force) Date: 1967

Background imageFixed Wing Collection: Saab J 29F Tunnan 29431 - '05'

Saab J 29F Tunnan 29431 - '05'
Flygvapnet - Saab J 29F Tunnan 29431 / '05', formerly of F3 Wing, at Malmslatt awaiting disposal on 23 September 1967. (Flygvapnet - Royal Swedish Air Force) Date: 1967

Background imageFixed Wing Collection: Saab J 29F Tunnan 29425 - '04'

Saab J 29F Tunnan 29425 - '04'
Flygvapnet - Saab J 29F Tunnan 29425 / '04', formerly of F3 Wing, at Malmslatt awaiting disposal on 23 September 1967. (Flygvapnet - Royal Swedish Air Force) Date: 1967

Background imageFixed Wing Collection: Saab J 29F Tunnan 29424 - '03'

Saab J 29F Tunnan 29424 - '03'
Flygvapnet - Saab J 29F Tunnan 29424 / '03', formerly of F3 Wing, at Malmslatt awaiting disposal on 23 September 1967. (Flygvapnet - Royal Swedish Air Force) Date: 1967

Background imageFixed Wing Collection: Saab J 29F Tunnan 29403 - '02'

Saab J 29F Tunnan 29403 - '02'
Flygvapnet - Saab J 29F Tunnan 29403 / '02', formerly of F3 Wing, at Malmslatt awaiting disposal on 23 September 1967. (Flygvapnet - Royal Swedish Air Force) Date: 1967

Background imageFixed Wing Collection: Vickers Varsity T.1 WF410, WF392 & WF413

Vickers Varsity T.1 WF410, WF392 & WF413
Royal Air Force - Vickers Varsity T.1 WF410, WF392 & WF413, (msn 556, 551 & 559) at RAF Cranwell. Date: 1966

Background imageFixed Wing Collection: Canadair T-33AN Silver Star 21588

Canadair T-33AN Silver Star 21588
Royal Canadian Air Force - Canadair T-33AN Silver Star 21588, (msn T33-588), at RAF Odiham on 5 September 1966. (re-designated CT-133) Date: 1966



All Professionally Made to Order for Quick Shipping