Bombardier has unveiled the latest addition to its Global business jet family with the official introduction of the Global 8000 on Monday. Offering a range of 8,000 NM and a top speed of Mach 0.94, the company is touting the aircraft as the “fastest and longest-range purpose-built business jet” in the world. Bombardier further noted that a flight using a Global 7500 flight test vehicle to demonstrate some of the Global 8000’s performance capabilities reached speeds above of Mach 1.015.
“Today, Bombardier solidifies once more its position as the leader in business aviation with the newest member of the industry-leading Global family,” said Bombardier President and Chief Executive Officer Éric Martel. “The Global 8000 aircraft leverages the outstanding attributes of the Global 7500 aircraft, providing our customers with a flagship aircraft of a new era. We remain unmatched, which for an innovation-focused team like us, is great.”
The Global 8000 will be powered by GE Aviation Passport engines and equipped with the Bombardier Vision flight deck. It will feature the company’s Smooth Flex Wing, a four-zone cabin, cabin altitude of 2,900 feet and Soleil circadian lighting system. List price for the Global 8000 is expected to be around $78 million and entry-into-service is targeted for 2025. According to Bombardier, current Global 7500 operators will be able to retrofit their aircraft to “experience the incredible performance enhancements on the Global 8000” once the 8000 enters service.
If a plane reaches Mach 1.015 does that make it ‘Supersonic’?
Parts of it will be supersonic long before that.
I’m very skeptical of that claim. The Chinese B737 seen diving vertically into the ground recently might have broken the speed of sound, but I doubt that Boeing will claim the aircraft is supersonic. The Mach Drag Rise that occurs as an aircraft approaches Mach 1 generally leads to higher power requirements and fuel consumption. Key would be to see Bombardier’s speed versus range claim for cruise flight. Maximum speed in a dive is a meaningless number.
Yeah, I gotta call BS on that number also. The amount of excess power required to exceed mach 1 in level flight – it’s just silly to think a modern bizjet would have that when it’s not part of the design. I think someone in marketing maybe saw some test data out of context and got a little too excited.
I think these bizjets that cruise up near Mach 1 (.925, etc.) all go supersonic during test because they have to prove that nothing peculiar happens if they exceed their maximum cruse by some percentage inadvertently. But I think they generally do that test with a descent. Agree it’s basically meaningless except that it makes good press release fodder.
The standard procedure is in FAR25 and equivalent TC/Euro rules.
You can look it up, noting the computation varies: AC25-335-1a.
IIRC B707’s maximum operating speed was 0.9M. I recall that DC-8 went above 1.0M in one test.
Airbus failed to understand the process in bidding for KC-135 replacement, confused the overspeed certification test with the KC-135s diving to get speed to refuel fast fighters – due to not enough thrust to go to MMO in level flight at high weights.
Note the term ‘cruise’ is variable, speed ‘up to’ Vmo I’d say, fuel consumption being an obvious consideration. An airliner behind schedule might be flown faster than it normally would but at cost of fuel.
Thrust available would be one reason to do the test in a dive.
Seems in these times, they should be promoting long range cruise Mach rather than the “top end” speed of Mach 0.94.
But not as impressive.
Perhaps the cabin display of track and speed should include instantaneous fuel mileage and cost.
I’ve watched my van’s readout on a level wide freeway, but need a completely empty one to drive slow enough to get to minimum. (Sensitive – can see change from slight change in slope as happens even on river delta.) In the old days a typical car’s sweet spot would be in the region of 40mph, much higher for 427 Corvette. 😉