Sikorsky’s revolutionary S-97 Raider helicopter has made its first flight, taking to the air on the morning of Friday, May 22, at the Sikorsky Development Flight Center in West Palm Beach, Fla.

The Raider — a high-speed, coaxial-rotor compound helicopter based on the company’s X2 technology demonstrator — flew for approximately an hour, performing a variety of low-speed maneuvers and three takeoffs and landings. On board were S-97 chief pilot Bill Fell as well as former X2 test pilot Kevin Bredenbeck, serving as co-pilot.

According to Fell, the fly-by-wire Raider was “rock-solid” during its first flight, performing largely as expected.

“We put a lot of investment into simulation and our software integration lab, and we’ve spent hundreds of hours in those labs and simulators developing the control laws,” he said. “So we were very happy when we lifted the aircraft into the air, it was almost exactly like the software lab — the one benefit being that we have better visual cues.

“We were able to march through the [flight test] card almost precisely like we did in simulation and get all of the data we desired,” he continued. “We’re excited to get on to the next flight and really expand the envelope.”

Friday’s flight launches a flight-testing program that is expected to last about a year, during which the Raider is expected to demonstrate high-G maneuvering and cruise speeds of up to 240 knots. On this first flight, the aircraft’s rear pusher-propeller — which enables maximum speeds well in excess of those of conventional helicopters — was intentionally spinning but not engaged.

“As we go through envelope expansion we will engage the prop and do the higher-speed portions of the envelope,” said Mark Miller, Sikorsky vice president, Research and Engineering.

Originally developed to compete for the U.S. Army’s Armed Aerial Scout program — which is now on indefinite hold — Raider is being self-funded by Sikorsky and 53 industry partners. A second Raider prototype is currently under construction, with final assembly expected this year. Sikorsky is planning to use that aircraft for a demonstration tour in 2016.

The Raider was initially projected to fly by the end of 2014, but Miller said that the use of new technologies and manufacturing techniques, such as additive manufacturing, delayed that ambitious timeline.

“This is not just a new helicopter,” he explained, “it is a testbed for the development of a lot of new technologies and some of those took a little longer.” On the positive side, he said, Sikorsky’s rigorous approach to introducing those technologies should “enable us to go fast on the back end . . . We took a little bit longer than we advertised for the first flight, but I think we’re going to move very smartly through the test program.”

Miller also noted that the approximately 11,400-pound (5,170-kilogram) gross weight Raider will serve as a “risk reducer” for the SB-1 Defiant, the larger coaxial-rotor compound helicopter that Sikorsky is developing with Boeing for U.S. Army’s Joint Multi-Role Technology Demonstrator program. Sikorsky and Boeing anticipate first flight of the SB-1 in 2017.

“The Defiant platform will leverage and take advantage of the capabilities that are being demonstrated on the Raider program,” Miller said.

http://www.verticalmag.com/news/article/SikorskyS97Raidermakesfirstflight

pulling pitch to the top.

That is comparing a 1970 Mustang to a 2015 Mustang.

Same in name only.

Seriously. The only thing in common is the coax rotor system.

Sikorsky learned a lot from their previous programs and rolled it into this one.

I went to a capes brief from JSOC and Sikorsky on the Raider. Its neat

I talked to a guy that flew it. Said it was a beast, but about the most impracticable thing flying.

And totally removed from military influence and funding. The Sikorsky guys are burning a lot of money with this project.

Essentially, yes. Pitch reduction in the main rotor, as well as reduced RRPM will reduce the onset of retreating blade stall.

Oh damn, I missed that post.

I wish he would tell me what helicopters the Russians do better than us. Seriously. The only one with a single argument is the MI26, since its the king daddy of all of them.

It has a clutch drive, and it is reversible as well.

It is a pusher prop. By reducing the thrust of the main rotor, and using it more just like a wing, the pusher prop will enable this compound helicopter to be about 100kts faster than a traditional one.