{"id":21141727,"date":"2026-09-08T16:52:12","date_gmt":"2026-09-08T14:52:12","guid":{"rendered":"https:\/\/migflug.com\/afterburner\/avro-730-mach-3-bomber-periscope-no-windscreen\/"},"modified":"2026-09-08T16:53:13","modified_gmt":"2026-09-08T14:53:13","slug":"avro-730-mach-3-bomber-periscope-no-windscreen","status":"publish","type":"post","link":"https:\/\/migflug.com\/afterburner\/es\/avro-730-mach-3-bomber-periscope-no-windscreen\/","title":{"rendered":"Britain Designed a Mach 3 Bomber the Pilot Could Not See Out Of"},"content":{"rendered":"<style>.et_pb_title_container h1.entry-title { padding-top: 40px !important; }<\/style>\r\n\r\n<p>In 1954 the Air Ministry wrote a requirement that no aircraft on earth could meet. OR.330 asked for a machine that would cruise at Mach 2.5 at 60,000 feet, be capable of Mach 3, fly 5,754 miles, and penetrate Soviet airspace and come home. Avro won the contract in 1955 and set about building it. The result was the Avro 730 &mdash; and the strangest thing about it was that the pilot would not be able to see where he was going.<\/p>\r\n\r\n<p>To keep the fuselage slender enough for Mach 3, the 730 had no conventional canopy. Production aircraft were to have two small side windows and an electrically operated retractable periscope, which the pilot would use for take-off and landing. At Mach 2.7 the skin would reach 277&nbsp;&deg;C. The airframe was to be stainless steel brazed honeycomb, the fuel would double as a heat sink, and a duplicated Freon refrigeration system would keep the crew compartment survivable.<\/p>\r\n\r\n\r\n<div style=\"background:#f5f5f5;padding:20px 24px;margin:24px 0;border-left:4px solid #5C91FF\"><p style=\"margin:0 0 10px;font-weight:700;font-size:17px;color:#0d1117\">Quick Facts<\/p><table style=\"width:100%;border-collapse:collapse;font-size:15px;line-height:1.6\"><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Aircraft<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Avro 730 (with the Avro 731 scale prototype)<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Role<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Strategic reconnaissance, later reconnaissance-bomber<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Requirement<\/strong><\/td><td style=\"padding:5px 0;color:#222\">OR.330 (1954), then RB.156T<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Length<\/strong><\/td><td style=\"padding:5px 0;color:#222\">163 ft 6 in (49.83 m)<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Wingspan<\/strong><\/td><td style=\"padding:5px 0;color:#222\">59 ft 9 in (18.21 m)<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Powerplant<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Eight Armstrong Siddeley P.176 afterburning turbojets in wingtip pods<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Design speed<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Mach 3 maximum, Mach 2.5 cruise<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Range<\/strong><\/td><td style=\"padding:5px 0;color:#222\">5,754 miles (9,260 km)<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Structure<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Stainless steel brazed honeycomb<\/td><\/tr><tr><td style=\"padding:5px 14px 5px 0;color:#555;vertical-align:top;white-space:nowrap\"><strong>Fate<\/strong><\/td><td style=\"padding:5px 0;color:#222\">Cancelled 1957; the sole test fuselage was cut up<\/td><\/tr><\/table><\/div>\r\n<h2>A requirement nobody could meet<\/h2>\r\n\r\n<p>When OR.330 was issued, Britain had no operational combat aircraft capable of supersonic flight at all. Meeting it meant inventing new aerodynamics, new materials and new engines more or less simultaneously. Three firms tried: Handley Page with the HP.100, Vickers with the SP4, and Avro with the Type 730. Handley Page got as far as a full-scale mock-up. In mid-1955 the Ministry of Supply gave Avro the development contract.<\/p>\r\n\r\n<p>For scale: the requirement predates the American programme it is usually compared with. The <a href=\"https:\/\/migflug.com\/aircraft\/sr-71-blackbird\/\">SR-71<\/a> lineage began at a meeting in 1958, four years after OR.330 was written.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/OYVD4rnOj2k\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\r\n<h2>Steel, not aluminium<\/h2>\r\n\r\n<p>The heat problem drove everything. At Mach 2 the external skin was expected to reach 190&nbsp;&deg;C; at Mach 2.7, 277&nbsp;&deg;C. Aluminium does not survive that, so the 730 would be built largely of stainless steel honeycomb &mdash; a material almost nobody in Britain had experience of forming, brazing or repairing at airframe scale.<\/p>\r\n\r\n<p>To learn how, the Ministry ordered a separate research aircraft: the Bristol Type 188, a stainless-steel test machine built to explore sustained supersonic heating. Two were flown. The 188 never reached its design speed, largely because it drank fuel faster than it could carry it, but the programme continued after the 730 was dead and the surviving airframe is at RAF Museum Cosford today.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/bristol-188-xf923-farnborough-1962.jpg\" alt=\"Bristol Type 188 XF923 at Farnborough in September 1962\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Bristol Type 188 XF923 at Farnborough, September 1962. The stainless-steel 188 was built to learn the material the Avro 730 would have been made of. Photo: Wikimedia Commons<\/figcaption><\/figure>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #d32f2f;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><a href=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/richard-stokes-mp-ipswich.jpg\" target=\"_blank\" style=\"flex-shrink:0\"><img decoding=\"async\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/richard-stokes-mp-ipswich.jpg\" alt=\"Richard Stokes MP\" style=\"width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:center;display:block;border:2px solid #ddd\"><\/a><div><em>&ldquo;Except for one machine which has now been scrapped and which we are not proceeding with, I have not come across anything, either among fighters or bombers &mdash; even on the drawing board &mdash; which is out of the &lsquo;aluminium age&rsquo; &hellip; they will be as out-of-date as the dodo by 1960.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Richard Stokes MP<\/strong> &mdash; Labour member for Ipswich, House of Commons defence debate, 16 April 1957<\/div><\/div><\/div>\r\n<p>The scrapped machine Stokes was describing was the Avro 730.<\/p>\r\n\r\n<h2>The aeroplane with no windscreen<\/h2>\r\n\r\n<p>Everything about the layout was subordinated to fineness ratio. The 730 was an unswept canard, 163 feet long, with a small centrally mounted wing and its engines carried in pods at the extreme wingtips &mdash; two per pod in the reconnaissance version, four per pod in the later bomber redesign, for eight engines in total. Pitch control came from elevators on the nose-mounted foreplane. The flight controls were quadruple-redundant electro-hydraulic units from Boulton Paul, with fly-by-wire and automatic stabilisation.<\/p>\r\n\r\n<p>The reason there was no canopy was the Red Drover side-looking radar, which needed a long antenna buried in the fuselage, and the drag penalty of anything that broke the line. Early development aircraft would have had a raised canopy for direct vision. Production aircraft would not. Three crew &mdash; pilot, navigator, radar operator &mdash; sat in one pressurised and refrigerated compartment with lightweight ejection seats.<\/p>\r\n\r\n<p>When the RAF added a bombing role in October 1955, the design grew. The crew dropped to two, the wing became a cropped delta with added outboard sections, and the bomb bay came out at 50 feet long, intended for a nuclear stand-off missile with a warhead developed under the code name Blue Rosette.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/ivf4mXaqME8\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\r\n<h2>Then it was over<\/h2>\r\n\r\n<p>The first prototype was under construction when the 1957 Defence White Paper landed. Duncan Sandys had concluded that ballistic missiles were overtaking manned aircraft, and that by the time the 730 entered service &mdash; around a decade later &mdash; Soviet surface-to-air missiles would shoot it down anyway. The programme was cancelled. The test fuselage was cut up. The effort went into Blue Streak, a medium-range ballistic missile that was itself cancelled in 1960.<\/p>\r\n\r\n\r\n<figure class=\"wp-block-image size-large\" style=\"margin:0 0 24px;width:100%\"><img decoding=\"async\" class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" width=\"1024\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/blue-streak-british-ballistic-missile.jpg\" alt=\"Blue Streak British medium-range ballistic missile on display\" style=\"width:100%;height:auto;max-width:100%;display:block\"><figcaption style=\"font-size:13px;color:#777;text-align:center;margin-top:6px;font-style:italic\">Blue Streak, the missile that inherited the Avro 730&rsquo;s budget. It was cancelled as a weapon in 1960. Photo: Wikimedia Commons<\/figcaption><\/figure>\r\n\r\n<div style=\"background:#f8f9fa;border-left:4px solid #1565c0;padding:20px 22px;margin:18px 0 24px;font-size:16px;line-height:1.7;display:flex;gap:20px;align-items:flex-start\"><a href=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/duncan-sandys-minister-of-defence.png\" target=\"_blank\" style=\"flex-shrink:0\"><img decoding=\"async\" src=\"https:\/\/migflug.com\/afterburner\/wp-content\/uploads\/sites\/4\/2026\/09\/duncan-sandys-minister-of-defence.png\" alt=\"Duncan Sandys\" style=\"width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:center;display:block;border:2px solid #ddd\"><\/a><div><em>&ldquo;We are unquestionably moving towards a time when fighter aircraft will be increasingly replaced by guided missiles and V-bombers by ballistic rockets, but all that will not happen overnight.&rdquo;<\/em><div style=\"margin-top:10px;font-size:14px;color:#555\"><strong>Duncan Sandys<\/strong> &mdash; Minister of Defence, House of Commons, 16 April 1957<\/div><\/div><\/div>\r\n<p>He was not wrong about the direction. He was wrong about the timetable, and about how much of an industry you can shut down in the meantime and still restart later. The <a href=\"https:\/\/migflug.com\/aircraft\/avro-vulcan\/\">Vulcan<\/a>, <a href=\"https:\/\/migflug.com\/aircraft\/handley-page-victor\/\">Victor<\/a> and <a href=\"https:\/\/migflug.com\/aircraft\/vickers-valiant\/\">Valiant<\/a> the 730 was meant to replace stayed in service for decades.<\/p>\r\n\r\n<h2>What it left behind<\/h2>\r\n\r\n<p>Not nothing. The aerodynamic and thermal work done for the 730 fed into Royal Aircraft Establishment studies on supersonic transport, and from there into the research that produced Concorde. The Bristol 188 flew. And the next attempt at the same problem &mdash; a fast, deep-penetration strike aircraft, this time flying low rather than high &mdash; became the <a href=\"https:\/\/migflug.com\/afterburner\/the-tsr-2-the-best-british-aircraft-that-never-served\/\">TSR-2<\/a>, which was cancelled too.<\/p>\r\n\r\n\r\n<div style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:24px 0\"><iframe class=\"skip-lazy\" data-no-lazy=\"1\" loading=\"eager\" src=\"https:\/\/www.youtube.com\/embed\/cZrapR5iMYo\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allowfullscreen><\/iframe><\/div>\r\n\r\n<style>.mfq{margin:34px 0 8px}.mfq h2{font:26px\/1.3 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117;padding-top:22px;margin:0 0 6px}.mfq .qa details{border-top:1px solid #5C91FF;margin:0;padding:0}.mfq .qa details:last-of-type{border-bottom:1px solid #e2e7ee}.mfq .qa summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;font:18px\/1.7 \"Gilroy semiBold\",Helvetica,Arial,sans-serif;color:#0d1117}.mfq .qa summary::-webkit-details-marker{display:none}.mfq .qa summary::after{content:\"+\";font:24px Helvetica,sans-serif;color:#3568e0;flex:0 0 auto}.mfq .qa details[open] summary::after{content:\"\\2013\"}.mfq .qa details:hover summary{color:#3568e0}.mfq .qa .a{font:16px\/1.7 \"Gilroy regular\",Helvetica,Arial,sans-serif;color:#454e5e;padding:0 26px 24px}.mfq .qa .a a{color:#3568e0}@media(max-width:680px){.mfq .qa summary{padding:18px 14px;font-size:17px}.mfq .qa .a{padding:0 14px 20px}}<\/style>\r\n\r\n\r\n<section class=\"mfq\"><h2>Frequently Asked Questions<\/h2><div class=\"qa\"><details open><summary>What was the Avro 730?<\/summary><div class=\"a\">The Avro 730 was a British Mach 3 strategic reconnaissance aircraft, later redesigned as a reconnaissance-bomber, developed by Avro from 1955 to meet Air Ministry requirement OR.330. It was to be built largely of stainless steel, carry eight engines in wingtip pods, and replace the V-bombers as Britain&rsquo;s airborne nuclear deterrent. It was cancelled in 1957 and never flew.<\/div><\/details><details><summary>Did the Avro 730 have a windscreen?<\/summary><div class=\"a\">No. To keep the fuselage slender enough for Mach 3, production Avro 730s were to have only two small side windows and an electrically operated retractable periscope for take-off and landing. Early development aircraft would have had a raised canopy for direct vision; the operational aircraft would not.<\/div><\/details><details><summary>How fast was the Avro 730 designed to fly?<\/summary><div class=\"a\">The Avro 730 was designed to cruise at Mach 2.5 and reach a maximum of Mach 3, at a service ceiling of about 66,400 feet with a range of 5,754 miles. Because the aircraft was cancelled before the first prototype was finished, those are design figures and were never flown.<\/div><\/details><details><summary>Why was the Avro 730 built of stainless steel?<\/summary><div class=\"a\">Because of kinetic heating. At Mach 2 the Avro 730&rsquo;s skin was expected to reach about 190&nbsp;&deg;C and at Mach 2.7 about 277&nbsp;&deg;C, which aluminium cannot sustain. The airframe was to use stainless steel brazed honeycomb, with fuel acting as a heat sink and a Freon refrigeration system cooling the crew compartment.<\/div><\/details><details><summary>Why was the Avro 730 cancelled?<\/summary><div class=\"a\">It was cancelled in 1957 as a consequence of the Defence White Paper produced by Minister of Defence Duncan Sandys, which prioritised ballistic missiles over manned aircraft. There was also a judgement that by the time the 730 entered service, roughly a decade later, Soviet surface-to-air missiles would be able to shoot it down. The sole test fuselage was cut up.<\/div><\/details><details><summary>Was the Avro 730 Britain&rsquo;s answer to the SR-71?<\/summary><div class=\"a\">Not in the sense of being a response to it. OR.330, the requirement behind the Avro 730, was issued in 1954, while the programme that produced the <a href=\"https:\/\/migflug.com\/aircraft\/sr-71-blackbird\/\">SR-71<\/a> originated at a meeting in 1958. The two aircraft aimed at broadly similar performance, but the British requirement came first.<\/div><\/details><details><summary>Does anything of the Avro 730 survive?<\/summary><div class=\"a\">No. The single test fuselage under construction at the time of cancellation was cut up, and no Avro 730 was ever completed. The closest surviving relative is the Bristol Type 188, the stainless-steel research aircraft built to explore the same heating problem, which is preserved at RAF Museum Cosford.<\/div><\/details><details><summary>What was the Bristol 188 and how was it connected to the Avro 730?<\/summary><div class=\"a\">The Bristol Type 188 was a stainless-steel supersonic research aircraft ordered to investigate sustained high-speed heating for the Avro 730 programme. Two were flown. It never reached its design speed, largely because of fuel capacity, but the programme continued after the 730 was cancelled.<\/div><\/details><\/div><\/section>\r\n\r\n\r\n\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What was the Avro 730?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Avro 730 was a British Mach 3 strategic reconnaissance aircraft, later redesigned as a reconnaissance-bomber, developed by Avro from 1955 to meet Air Ministry requirement OR.330. It was to be built largely of stainless steel, carry eight engines in wingtip pods, and replace the V-bombers as Britain\u2019s airborne nuclear deterrent. It was cancelled in 1957 and never flew.\"}},{\"@type\":\"Question\",\"name\":\"Did the Avro 730 have a windscreen?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. To keep the fuselage slender enough for Mach 3, production Avro 730s were to have only two small side windows and an electrically operated retractable periscope for take-off and landing. Early development aircraft would have had a raised canopy for direct vision; the operational aircraft would not.\"}},{\"@type\":\"Question\",\"name\":\"How fast was the Avro 730 designed to fly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Avro 730 was designed to cruise at Mach 2.5 and reach a maximum of Mach 3, at a service ceiling of about 66,400 feet with a range of 5,754 miles. Because the aircraft was cancelled before the first prototype was finished, those are design figures and were never flown.\"}},{\"@type\":\"Question\",\"name\":\"Why was the Avro 730 built of stainless steel?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Because of kinetic heating. At Mach 2 the Avro 730\u2019s skin was expected to reach about 190 &deg;C and at Mach 2.7 about 277 &deg;C, which aluminium cannot sustain. The airframe was to use stainless steel brazed honeycomb, with fuel acting as a heat sink and a Freon refrigeration system cooling the crew compartment.\"}},{\"@type\":\"Question\",\"name\":\"Why was the Avro 730 cancelled?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It was cancelled in 1957 as a consequence of the Defence White Paper produced by Minister of Defence Duncan Sandys, which prioritised ballistic missiles over manned aircraft. There was also a judgement that by the time the 730 entered service, roughly a decade later, Soviet surface-to-air missiles would be able to shoot it down. The sole test fuselage was cut up.\"}},{\"@type\":\"Question\",\"name\":\"Was the Avro 730 Britain\u2019s answer to the SR-71?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not in the sense of being a response to it. OR.330, the requirement behind the Avro 730, was issued in 1954, while the programme that produced the SR-71 originated at a meeting in 1958. The two aircraft aimed at broadly similar performance, but the British requirement came first.\"}},{\"@type\":\"Question\",\"name\":\"Does anything of the Avro 730 survive?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The single test fuselage under construction at the time of cancellation was cut up, and no Avro 730 was ever completed. The closest surviving relative is the Bristol Type 188, the stainless-steel research aircraft built to explore the same heating problem, which is preserved at RAF Museum Cosford.\"}},{\"@type\":\"Question\",\"name\":\"What was the Bristol 188 and how was it connected to the Avro 730?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Bristol Type 188 was a stainless-steel supersonic research aircraft ordered to investigate sustained high-speed heating for the Avro 730 programme. Two were flown. It never reached its design speed, largely because of fuel capacity, but the programme continued after the 730 was cancelled.\"}}]}<\/script><p><em>Sources: Wikipedia (Avro 730; 1957 Defence White Paper); Hansard, House of Commons Defence debate, 16 April 1957; Derek Wood, &ldquo;Project Cancelled&rdquo; (1975); Norman Polmar, &ldquo;Spyplane: The U-2 History Declassified&rdquo; (2001).<\/em><\/p>\r\n\r\n\r\n<div style=\"background:#f0f4ff;border-left:4px solid #5C91FF;padding:16px 20px;margin:32px 0 8px\"><p style=\"margin:0 0 8px;font-weight:600;color:#333\">Related Posts<\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/hawker-p-1121-mach-2-5-fighter-never-flown\/\">Hawker Built a Mach 2.5 Fighter, Then Refused to Fly It<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/the-tsr-2-the-best-british-aircraft-that-never-served\/\">The TSR-2: The Best British Aircraft That Never Served<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/avro-vulcan-delta-v-bomber-howl\/\">The Avro Vulcan: The Delta That Howled<\/a><\/p><p style=\"margin:4px 0\"><a href=\"https:\/\/migflug.com\/afterburner\/avro-707-delta-research-aircraft-vulcan-testbed\/\">Avro 707: The Little Delta That De-Risked the Vulcan<\/a><\/p><\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>The Avro 730 was to cruise at Mach 2.5 in stainless steel, with no windscreen and a periscope for landing. Then the 1957 White Paper arrived.<\/p>","protected":false},"author":27,"featured_media":21140898,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"editor_notices":[],"footnotes":""},"categories":[666,664],"tags":[],"class_list":["post-21141727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-history-and-legends","category-military-aviation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Avro 730: Britain\u2019s Mach 3 Bomber With No Windscreen<\/title>\n<meta name=\"description\" content=\"The Avro 730 was to cruise at Mach 2.5 in stainless steel, with a periscope instead of a windscreen. 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