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Boom’s XB-1 Supersonic Test Jet Takes To The Skies
Boom Supersonic's XB-1 demonstrator took flight for the first time yesterday. XB-1, also referred to as the "Baby Boom," constitutes a one-third-scale technology demonstrator of the larger 55-seat supersonic airliner design known as Overture, with which Boom is hoping to shake up both commercial and military aviation.
The inaugural flight took place at the Mojave Air & Space Port, California. A video was released by Boom, showing XB-1 during takeoff as well as flying above the desert landscape. That same airspace over “Test Flight Valley” has hosted many historic first flights in the past — including Bell's X-1, the North American X-15, and the Lockheed SR-71 Blackbird.
"[Yesterday] XB-1 took flight in the same hallowed airspace where the Bell X-1 first broke the sound barrier in 1947," Blake Scholl, Boom founder and CEO, said. "I've been looking forward to this flight since founding Boom in 2014, and it marks the most significant milestone yet on our path to bring supersonic travel to passengers worldwide."
According to Boom, XB-1 "met all of its test objectives" during its first flight, "including safely and successfully achieving an altitude of 7,120 feet and speeds up to 238 knots (273 mph, or Mach 0.355)." Flight-tracking data shows that the aircraft flew for under 30 minutes in total.
"While XB-1 was in the air, the team performed an initial assessment of the aircraft's handling qualities, including airspeed checks with the T-38 chase aircraft, and assessing the aircraft's stability in the landing attitude [at a high angle of attack]," the company further notes.
The aircraft was flown by Chief Test Pilot Bill "Doc" Shoemaker, who said the following of today's events. "Everyone on the XB-1 team should be incredibly proud of this achievement. It has been a privilege to share this journey with so many dedicated and talented professionals. The experience we have gained in reaching this milestone will be invaluable to Boom’s revival of supersonic travel."
Test Pilot Tristan "Geppetto" Brandenburg, who flew the T-38 chase aircraft that monitored XB-1 in the air, said: "Being in the air with XB-1 during its maiden flight is a moment I will never forget. The team has been working hard to get to this point, and seeing today’s flight through mission completion is a huge accomplishment for all of us."
XB-1, which The War Zone has previously written about, measures 62.6 feet long and features an elongated delta-wing planform with a wingspan of 21 feet. The demonstrator "leverages state-of-the-art technologies" in order "to enable efficient supersonic flight including carbon fiber composites, advanced avionics, digitally-optimized aerodynamics, and an advanced supersonic propulsion system," Boom highlights.
Its propulsion system comprises three General Electric J85-15 turbojets (the same as what’s found in the F-5 Freedom Fighter), which collectively provide more than 12,000 pounds of thrust. XB-1 is expected to have a top speed of around Mach 2.2 (1,687.99 miles per hour).
Now that its first flight has been conducted, Boom is set to expand XB-1's flight envelope in order to confirm its performance and handling qualities through, and beyond, Mach 1. Shoemaker will once again be in the cockpit for the first supersonic flight when this occurs.
Of course, the achievement represents a huge milestone for the company, and particularly for its future Overture supersonic airliner. Overture will measure 201 feet from nose to tail, and theoretically be able to achieve cruising speeds of Mach 1.7 (1,304 miles per hour) and a maximum speed of Mach 2.2. It will, according to Boom, have a maximum range of 4,500 nautical miles.
For Boom, Overture has both potential commercial as well as military applications.
In terms of defense-related interest, the company has been working with the U.S. Air Force since 2020 to explore a configuration of Overture intended specifically for government executive flight. The rapid transit of cargo, as well as personnel transport, could well constitute future Air Force uses of Overture.
In July 2022, Northrop Grumman and Boom announced a collaboration to develop a variant of the future Overture supersonic airliner specifically for the U.S. and allied military forces. As Boom highlighted, that variant could well provide the military with the speed needed to execute "rapid-response missions."
"Fitted with specialized capabilities, the aircraft could be used to deliver medical supplies, provide for emergency medical evacuation or surveil vast areas faster than conventional aircraft," the company noted. "The special mission Overture variant could also be used to coordinate other aircraft and ground assets in a variety of scenarios."
In September last year, Boom announced the launch of its Defense Advisory Group, building on its collaboration with Northrop Grumman, to progress development on "defense variants" of Overture. The aim of the group is to help identify the "national security missions" the aircraft could be used for; although Boom did not specify which missions are being explored by the Defense Advisory Group in its announcement.
Of course, this isn't the first time in recent memory that potential commercial supersonic aircraft could be useful for military applications. Back when Lockheed Martin announced that it was working with Aerion to develop the AS2 supersonic business jet — which has since gone defunct — in 2017, we outlined the various ways in which its capabilities could be harnessed by the U.S. military, which you can read more about here.
On the commercial side, Overture will supposedly accommodate a total of 64-80 passengers, with the aim of making supersonic travel more affordable to greater numbers of travelers. The aircraft itself is "designed... to be profitable for airlines at fares similar to first and business class... across hundreds of transoceanic routes," the company's website notes, in theory offering business-class fares at a fraction of the cost of tickets to board the Anglo-French Concorde, which was retired from commercial supersonic flight in late-2003.
Each aircraft will cost $200 million to produce, Boom has claimed in the past. It states on its website that "Overture’s order book stands at 130 orders and pre-orders," with commitments from American Airlines, United Airlines, and Japan Airlines.
Overture is slated to roll out in 2026, begin test flights in 2027, and is expected to receive type certification by 2029; an end goal that Boom has targeted for several years at this point. However, this timeline is very much subject to a huge number of different factors going right for the company and is extremely ambitious.
Whether or not Boom ultimately sticks to this schedule, or anything resembling it, the first flight of XB-1 marks an important step towards making the company's vision of commercial supersonic flight a reality.
And regardless of whether Overture comes to fruition, it’s just awesome to see a new exotic test jet gracing the skies over the Mojave Desert.
注释：
overture: n
表示"序曲"，means "orchestral music played at the beginning of an opera or oratorio"，如：They played the overture at a fairly slow tempo. 他们用相当缓慢的速度演奏那首序曲。
inaugural: adj
表示"开幕的；首次的"，means "occurring at or characteristic of a formal investiture or induction"，如：Only 13 nations took part in the inaugural tournament, with a majority of nine coming from South America. 只有13个国家参加了首次世界杯联赛，其中大部分来自南美。
hallow: v
表示" 使 ... 神圣；视为神圣"，means "render holy by means of religious rites"，如：This area was hallowed by sacred memories. 这个地区由于宗教上的纪念意义而被视为圣地。
avionics: n
表示"航空电子学；航空用电子设备"，means "science and technology of electronic systems and devices for aeronautics and astronautics"，如：Avionics has become even more important with the development of the space program. 随着太空项目的发展，航空电子技术愈加重要了
cockpit: n
表示"驾驶室 "，means "the part of a plane,small boat,or racing car in which the pilot or driver sits"，如：Seated in the cockpit, the pilot of a plane has a lot of controls at his fingertips. 在飞机驾驶舱中，驾驶员一伸手就可触及许多操纵装置。
defunct: adj
表示"死的；不能使用的；非现存的；失效的"，means "no longer in force or use; inactive"，如：A family name becomes defunct when the only heir dies without any son. 当唯一的继承人死去了之后没儿子，那这个姓就要绝迹了。
slate: v
表示"提名"，means " list of candidates for nomination or election"，如：Mr. Miller is slated to become chairman next month. 密勒先生已定於下个月担任主席。
fruition: n
表示"实现；完成"，means "the condition of bearing frui"，如：Our efforts have come to fruition. 我们的努力有了成果。
中文简要说明：
研发静声超音速客机的大噪公司(Boom Supersonic)，其XB-1 技术验证机完成首次飞行，飞行时间不到30分钟，也并未进入超音速。但这已是技术验证的重要一步。
战区(The Warzone)报导，XB-1也称为「迷你大噪」(Baby Boom)，是「序曲」(Overture)大型超音速客机(55人座)的三分之一规模，大噪公司希望利用这架飞机，实验他们的飞机设计合理性，以及减噪技术。
这趟飞行是在加州莫哈韦航天站(Mojave Air and Space Port)进行，这里是美国空军著名的「试飞谷」，包括贝尔的X-1、北美X-15和洛克希德SR-71 黑鸟。
大噪公司创办人兼执行长布兰克‧绍尔(Blake Scholl)表示：「XB-1能够与首次突破音噪的贝尔 X-1实验机，在同一神圣空域起飞，我们倍感荣幸。自2014 年创立大噪公司以来，我一直期待着这次飞行，它标志着超音速航空的复兴。」
据公司表示， XB-1达到了所有测试目标，包括安全飞到7,120 英尺(2170公尺)的高度，速度达到238节（440公里/小时、0.355马赫），总共飞行了不到30分钟。
XB-1全长19公尺，具有细长的三角翼，翼展为6公尺，安装3具奇异 J85-GE-15 涡轮喷射发动机(与 F-5战斗机同），预计最高速度约为 2.2 马赫。
大噪强调，它利用最先进的技术，包括碳纤维复合材料、先进的航空电子设备、数字优化的空气动力学和先进的超音速推进系统，以实现高效率的超音速飞行 。
完成首次的飞行后，接下来的挑战度更大，XB-1必须证实飞机在跨入超音速时，引发的音爆与冲击波并不会影响地面。再之后，大噪才能设计55人座的序曲超音速客机。
序曲号客机，长度为61公尺，理论上能够达到1.7马赫（1,304英里/小时）的巡航速度，最高速度为2.2马赫。既有潜在的商业应用，也有军事应用。
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