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Piper Jet First Flight!  
User currently offlineBoeing4ever From , joined Dec 1969, posts, RR:
Posted (6 years 1 month 3 weeks 2 days ago) and read 3188 times:

Piper Aircraft announced on July 30th at EAA AirVenture in Oshkosh, Wisconsin that the first example of their entry into the VLJ market, the Piper Jet, has completed its first flight. It's Piper's first jet powered design in company history and the first new aircraft the company has designed since the mid-80's.


PIPERJET MAKES FIRST FLIGHT

--------------------------------------------------------------------------------

OSHKOSH, Wis., EAA AirVenture, July 30, 2008 — Piper Aircraft announced today that its revolutionary PiperJet – the first pure, jet-powered, turbofan design in the company’s 71-year history – made its first flight at 11:11 AM today from Piper Headquarters in Vero Beach, Fla.

...

The PiperJet flew for one hour, reaching a maximum altitude of 10,000 feet and a speed of 160 KTAS as per the flight test plan. Piper Test Pilots Dave Schwartz and Buddy Sessoms were at the controls.

...

The PiperJet incorporates many new design features, and the first flight was focused on taking an early look at basic handling characteristics, the effects on pitch trim with power changes, and basic operation of the engine’s FADEC control system.

"The PiperJet exhibited excellent control response around all three axes," said Schwartz. "The ergonomics and the basic operation of the side stick control were excellent, with well-balanced and harmonized control inputs required for the air speeds that we tested. Moreover, the expected level of pitch trim change with power applications was minimal and easy to overcome."

The PiperJet is powered by a single Williams FJ44-3AP engine rated at 3,000 pounds of thrust. In the PiperJet application, the engine is de-rated to approximately 2,400 pounds of thrust.

...

With completion of first flight, the PiperJet has begun a 50 hour initial flight test program to expand the envelope and further investigate the aerodynamic configuration and basic flight performance. Piper test pilots expect to retract the landing gear on the PiperJet’s next flight, after which they will make several more flights to expand the high-speed envelope, eventually reaching 360 KTAS. Envelope expansion will also include higher operating altitudes, up to a maximum of 35,000 feet.

Piper plans a public unveiling of the PiperJet for existing and prospective customers and the news and aviation media in late August or early September at the Piper factory in Vero Beach, Fla., during which Piper test pilots will demonstrate the PiperJet’s full flight capabilities. Details of this event will be forthcoming.



http://www.newpiper.com/company/newsitem.asp?NewsID=125

Deliveries are planned for 2011. The aircraft seats 6 pax.

A link to the first flight video for those interested...

http://www.piper.com/piperjet/images/PiperJetFirstFlight.wmv

Exciting times for general aviation, that's for sure! Big grin

 airplane B4e-Forever New Frontiers airplane 

8 replies: All unread, jump to last
 
User currently offlineF9Animal From United States of America, joined Dec 2004, 5055 posts, RR: 28
Reply 1, posted (6 years 1 month 3 weeks 1 day 21 hours ago) and read 3096 times:

Interesting looking airplane. The only worry I have is that it is a single engine. A bird strike in the only engine on takeoff could be bad.


I Am A Different Animal!!
User currently offlineXtoler From United States of America, joined Sep 2007, 953 posts, RR: 0
Reply 2, posted (6 years 1 month 3 weeks 1 day 21 hours ago) and read 3050 times:

Cool! I didn't even realized they built a real one yet. I guess I should look forward to that in my next issue of Flying.

As far as a bird strike in a single jet aircraft, well, how many F-16's have been taked down by a birdstrike? Now that I think about it, I can't think of too many single engine jets being developed in a long time, and not very many designed for civilian use. Well, maybe Diamond Jet, they may have two air inlets but the engine is pretty well imbedded. The Piper jet does have a strange configuration. On a mx standpoint I don't know how well people will want to work on it, but as far as safety, I'm sure it will be okay. I don't think a birdstrike would be too much of a problem, and I'm sure it's already been tested. Seeing as how the engine is on top but in the back, a bird would probably hit everything else but the engine inlet.



EMB145 F/A, F/E, J41 F/A, F/E, because my wife clipped my wings, armchair captain
User currently offlineBoeing4ever From , joined Dec 1969, posts, RR:
Reply 3, posted (6 years 1 month 3 weeks 1 day 13 hours ago) and read 2915 times:



Quoting F9Animal (Reply 1):
Interesting looking airplane. The only worry I have is that it is a single engine. A bird strike in the only engine on takeoff could be bad.

Wouldn't be any worse than in a 172, SR-22, Malibu, or Cherokee I'd imagine. At least there wouldn't be off center thrust issues.

Quoting Xtoler (Reply 2):
Now that I think about it, I can't think of too many single engine jets being developed in a long time, and not very many designed for civilian use.

Single engine private jets are the new "it" thing in GA. Right now, there's the Diamond D-Jet close to certification, the Piper Jet had it's first flight, the Eclipse 400 which debuted at AirVenture last year, and the Cirrus Vision SJ50 which first flew last month. I'm probably forgetting a few more.

Quoting Xtoler (Reply 2):
Well, maybe Diamond Jet, they may have two air inlets but the engine is pretty well imbedded.

To me it seems vulnerable to FOD from runways with that config. But I don't think it's critical.

Quoting Xtoler (Reply 2):
On a mx standpoint I don't know how well people will want to work on it, but as far as safety, I'm sure it will be okay.

Mx personnel will probably prefer to D-Jet. I'd imagine Piper's offering will get some minor scorn.  Smile

 airplane B4e-Forever New Frontiers airplane 


User currently offlineBok269 From United States of America, joined May 2007, 2104 posts, RR: 0
Reply 4, posted (6 years 1 month 3 weeks 1 day 13 hours ago) and read 2905 times:



Quoting Boeing4ever (Reply 3):

Wouldn't be any worse than in a 172, SR-22, Malibu, or Cherokee I'd imagine. At least there wouldn't be off center thrust issues.

The bigger issue I've heard people concerned about is an engine failure at cruise, resulting in a decompression.



"Reality is wrong, dreams are for real." -Tupac
User currently offlineBoeing4ever From , joined Dec 1969, posts, RR:
Reply 5, posted (6 years 1 month 3 weeks 1 day 13 hours ago) and read 2864 times:



Quoting Bok269 (Reply 4):
The bigger issue I've heard people concerned about is an engine failure at cruise, resulting in a decompression.

Curious, are you talking about an uncontained failure where something pierces the cabin, or will the thing just depressurize if the engine is off? I can't imagine every outflow valve just popping open on shut down.

Either way, if the engine fails, it's time to start landing, decompression or not. The big concern then is just how quickly decompression happens...if it happens so fast that the crew is incapacitated, then we'd see something like a shorter version of the Payne Stewart tragedy.

 airplane B4e-Forever New Frontiers airplane 


User currently offlineShyFlyer From , joined Dec 1969, posts, RR:
Reply 6, posted (6 years 1 month 3 weeks 1 day 13 hours ago) and read 2862 times:

This thread is worthless without pics!


View Large View Medium
Click here for bigger photo!

Photo © Christopher Wahl



Little odd looking, but I think it will grow on me. I'd still rather have a TBM850 or PC-12NG though.


User currently offlineBok269 From United States of America, joined May 2007, 2104 posts, RR: 0
Reply 7, posted (6 years 1 month 3 weeks 1 day 13 hours ago) and read 2846 times:



Quoting Boeing4ever (Reply 5):

Curious, are you talking about an uncontained failure where something pierces the cabin, or will the thing just depressurize if the engine is off? I can't imagine every outflow valve just popping open on shut down.

Either way, if the engine fails, it's time to start landing, decompression or not. The big concern then is just how quickly decompression happens...if it happens so fast that the crew is incapacitated, then we'd see something like a shorter version of the Payne Stewart tragedy.

B4e-Forever New Frontiers

I was mainly talking about the cabin being unable to pressurize without the engine turning.



"Reality is wrong, dreams are for real." -Tupac
User currently offlineBoeing4ever From , joined Dec 1969, posts, RR:
Reply 8, posted (6 years 1 month 3 weeks 1 day 12 hours ago) and read 2818 times:



Quoting Bok269 (Reply 7):
I was mainly talking about the cabin being unable to pressurize without the engine turning.

Good point. Piper seemed to feel this one out and provided assurances based on the design work here:

http://www.piper.com/piperjet/images/piperjet_designroom_3.pdf


One of a pilot’s prime concerns is cabin decompression at high altitudes. In the event an engine fails at 35,000 feet, the cabin will not experience a rapid decompression. Instead, pressure will leak out of the cabin at a much slower rate. If the cabin were to reach an altitude of 15,000 feet, an automatic emergency oxygen system will deploy oxygen masks to the pilot and passengers with enough oxygen for the entire emergency descent profile.

...

The batteries will supply enough electricity to power the PiperJet for a minimum of 30 minutes, with only essential equipment operating. Automatic load shedding will ensure that navigation, communication and other essential systems remain operational during the descent. Electrically operated flaps and landing gear will also remain operational without the engine operating.



So if cabin altitude reaches 15,000 ft, occupants will be provided with oxygen masks. Otherwise, pressure leakage will be slow enough to allow for the emergency engine-out descent and landing. Good question though, I wonder how Cirrus, Eclipse and Diamond are tackling the issue.

 airplane B4e-Forever New Frontiers airplane 


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