Tag: XB-1

On-going manned test flights of Boom’s prototype supersonic plane inching towards the supersonic

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During the on-going manned test flights of Boom’s one-third scale prototype supersonic plane, dubbed XB-1, the maximum flight speeds have been steadily increased as they company tests the plane’s design and structure.

[On October 7th on the fifth manned flight] Chief Test Pilot Tristan “Geppetto” Brandenburg set a record for the XB-1 shod with GE J85-15 turbojet engines, taking it up to 17,800 ft (5,425 m) and as fast as Mach 0.69 (428 knots / 492 mph / 791 km/h, true airspeed) over its 50-minute-long test flight, marking the highest and the fastest it’s flown so far.

Boom tested its flutter excitation system (FES) at Mach 0.6 … which must be unnerving for a test pilot. The FES is a system that deliberately induces vibrations into an aircraft’s airframe to help engineers find potential structural issues, particularly at higher speeds. They do this so structural issues (that could cause flutter) don’t rear their ugly head mid-flight.

The plan is to do five more test flights before attempted to break the sound barrier.

At the completion of this testing the company will then begin manufacture of its full scale supersonic passenger plane, dubbed Overture, that will carry up to 80 passengers and will sell to airlines. It already has contracts and financial support from a number of major airlines, including United and Japan Airlines.

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Boom completes second flight test of one-third-scale prototype supersonic jet

9:28 am

The airplane startup Boom Supersonic on August 26, 2024 successfully completed the second test flight of its one-third-scale prototype XB-1 supersonic jet, taking off from the Mojave Air & Space Port in California.

The flight was manned by the company’s chief test pilot Tristan Brandenburg, and had as its primary engineering goal to test the retraction and deployment of the jet’s landing gear. During the fifteen minute flight the plane climbed to 10,400 feet and a maximum speed of 277 miles per hour.

The test checklist included retracting and extending the undercarriage for the first time, checking the plane’s handling, and the activation of a new digital stability augmentation system for roll damping to help maintain control in stall conditions. In addition, the right wing of the XB-1 was fitted with tufting to monitor the direction and strength of airflow over the wing.

The company plans a 10-flight test program with this prototype, eventually leading to flights exceeding the speed of sound. Boom also claims that its design will reduce the sound of the sonic boom, thus allowing its commercial supersonic jet to fly over land and increasing its commercial value. At the moment it has orders to sell as many as 96 of its full-scale plane to various airlines, including United and Japan.

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Boom’s one-third-scale prototype supersonic jet finally takes off

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The private startup Boom has finally flown its third-scale prototype supersonic jet, dubbed XB-1, on its first short flight, taking off on March 22, 2024 from the flight test facility in Mojave, California.

Following behind was Test Pilot Tristan “Geppetto” Brandenburg in a T-38 chase plane to observe the flight and confirm altitude and speed. With a length of 62.6 feet (19 m) and a wingspan of 21 ft (6 m) , the XB-1 achieved an altitude of 7,120 ft (2,170 m) and speeds up to 238 knots (273 mph, 440 km/h) under the force of its three GE J85-15 engines generating a maximum thrust of 12,300 lbs.

According to Boom, once its aerodynamic characteristics and flight worthiness are confirmed, the XB-1 will increase speed until it is flying on later tests in excess of Mach 1.

This prototype supersonic test plane was first unveiled in 2020, four years ago, but runway taxi tests did not begin until 2023. I suspect the Wuhan panic contributed to the three year delay between unveiling and first tests, though this is speculation.

The goal is to build the first commercial superonic passenger plane since the Concorde. At present Boom has a contract from United for fifteen Boom 12-passenger planes, plus development deals with Boeing, and Japan Airlines.

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Boom unveils its first half-scale prototype commercial supersonic jet

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Boom Supersonic, an aviation company that wants to build commercial supersonic passenger jets, has unveiled its first half-scale prototype, dubbed the XB-1, or “Baby Boom”.

They had announced the development of this jet several years ago, and have experienced some delays since. They had hoped to begin commercial operations of their commercial model, dubbed Overture, by ’23, but this remains unclear. Regardless, there does seem interest in this airplane among the commercial carriers, assuming they survive the Wuhan flu panic.

Boom says that the airliner has a projected unit cost of around $200 million each, not including a customer’s desired interior configuration and other unspecified optional extras. This would make it cheaper than many subsonic widebody airliners now on the market, but those aircraft can also carry substantial more passengers. For example, in 2018, Airbus said that the average price of one of its popular A330-200s was approximately $238.5 million, but that aircraft has a maximum seating capacity of 406, nearly four times that of Overture as presently planned. Boeing says that the average price of one of its 767-300ER airliners is around $217.9 million, but again, those planes can seat nearly 300 passengers, depending on the internal configuration.

There has already been not insubstantial interest in the Overture, though, with Boom saying it has commitments to buy up to 76 of the jets from five airlines, including Virgin and Japan Airlines (JAL). Virgin Group has been a major investor in Boom for years now, as well. The Spaceship Company, a Virgin Galactic subsidiary, was previously reported to be preparing to assist in building and testing the airliners.

I will admit, however, that I do not find it encouraging that Virgin Galactic is involved in the plane’s development. In fact, it might even help explain why development was delayed.

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