Air Force

June 7, 2013

From concept to combat Test pilots share evolution of flying wing

Tags:
Laura Mowry
Staff Writer

Artistís rendition of a version of the YB-49 transforming into the B-2 Spirit.

Sixty-five years ago, the flight test community suffered a tremendous loss June 5, 1948, when the Northrop YB-49 broke apart mid-air in the skies over the Mojave Desert. The jet-powered flying wing, crashed just five miles north of the base.

All five crew members lost their lives that day, including Californian Capt. Glen Edwards who was flying as co-pilot with Maj. Daniel Forbes Jr. At the request of retired Maj. Gen. Albert Boyd (then Col. Boyd) Muroc Air Force Base was redesignated Edwards Air Force Base Dec. 8, 1949 in honor of the young captain’s heroism and sacrifice.

According to retired Brig. Gen. Robert Cardenas, who served as the chief test pilot on the YB-49 program, Jack Northrop’s vision of the flying wing was a revolutionary concept; it was just too advanced for 1940s technology.

In November 1948, Cardenas appeared before Jack Northrop and the General Officer’s Board to share his perspective on the controversial program.
“When I appeared before the board, I told them Mr. Northrop’s concept is going to give you one of the most potent weapon systems you’ve ever had. But, the YB-49 has exceeded the human sensory and response capability because we humans are reactive. This aircraft needs a proactive system and I don’t know what it is,” said Cardenas.

The insight Cardenas brought to the board included his experience learned during the stall series of Phase II testing and the tumble which resulted after his first attempt.

“As I entered my first stall, I was using the trim tab. Instead of a normal stall, it gave a serious lurch forward and went into a full negative tumble,” said Cardenas.

At the time, there were no computers, no ejection seat or pod – Cardenas had no other option but to maneuver out of the tumble.

“The situation I was in, the negative g-forces had me pinned off the seat and I couldn’t jump down, all I had left was to apply asymmetric power with four engines and that would cartwheel me. If I cartwheeled, it would probably throw me into a spin that I could get out of. That’s what I did. That was the only thing I had left since we didn’t have seat ejection,” said Cardenas.

“Now, Major Forbes was with me and he saw what I did, he was my co-pilot during Phase II testing. When they crashed, if he was flying it, why he did not do the same thing, I don’t know. In their case, the tumble got pretty severe and they lost the outer wing panels. The only thing left was the center section.”

The YB-49 program was cancelled, but Cardenas recommended to the General Officer’s Board that they should not give up on Northrop’s vision; rather they should invest in long-term research and development, to give technology a chance to play catch up.

While Cardenas’ recommendation was declined, technology eventually caught up and led to the design and development of the B-2 Spirit stealth bomber.

“We just needed computers to catch up with the flying wing design to capitalize on those things Jack Northrop was originally after; increased range, decreased drag, and the ability to carry everything internally. Computers were pivotal in the design of the aircraft itself, putting it in the air, stabilizing it, and performing the mission.” said Maj. Adam Goodpasture, B-2 flight commander, 419th Flight Test Squadron.

“I view [the B-2] as Jack Northrop’s original vision finally realized due to advancements in technology. The sacrifices of the crew and their families and the work put into testing the YB-49 left a legacy that is evident today in the Spirit – the world’s most lethal aircraft. Thank you,” Goodpasture said to Cardenas.

Nearly 40 years after the last flight of the YB-49, the concept of the flying wing became one of the Air Force’s greatest assets.

“The deterrence piece of the B-2 is not only our conventional and stealth capability, but our ability to carry nuclear weapons. It’s a very powerful, strategic deterrent for our country. We treat that very seriously to include the development of future capabilities,” said Goodpasture.
Today, the men and women of the 419th FLTS work to keep the stealth bomber on the cutting edge of technology.

“Once computers came in, it resolved a lot of problems. I was right when I told the generals they would someday have a formidable weapon system, I’m glad they didn’t let the idea die, the B-2 is a beautiful bird,” said Cardenas.

“And it’s good to keep remembering the past because otherwise you may make the same mistakes again.”

To learn more about the evolution of the flying wing and the†65th anniversary of the loss of the YB-49 and its crew, please contact the Air Force Flight Test Museum at (661) 277-8050.




All of this week's top headlines to your email every Friday.


 
 

 

Enlisted members interested in attache duty must apply by June

Active duty staff through senior master sergeants interested in attache’ duty opportunities with international affairs teams around the world must submit their applications by June 15, 2015 to be considered. The Office of the Deputy Under Secretary of the Air Force, International Affairs is accepting applications for enlisted Defense Attache’ Specialists at 23 locations, with...
 
 

HYT extension possible for SrA-MSgt in 35 career fields

Eligible senior airmen, staff sergeants, technical sergeants and master sergeants in 35 Air Force specialties will be able to apply for a high year of tenure extension and, if approved, will be able to extend between 12 and 24 months past their current HYT. The Air Force is introducing several personnel and manpower initiatives to...
 
 
Air Force photograph by Rebecca Amber

USNORTHCOM brings exercise ARDENT SENTRY to Edwards

Air Force photograph by Rebecca Amber An Army Sentinel Mobile Command Center provides power and satellite communications during an exercise or real-world natural disaster. Edwards AFB was treated as a simulated basic-staging ar...
 

 

AFMC’s Wingman Intervention program going strong

More than a year after it was introduced, Air Force Materiel Command’s Wingman Intervention program is still going strong. “During the spring 2013 Wingman Day, AFMC made a concerted effort to provide its Airmen with the skills and confidence they need to safely intervene when they see fellow Airmen entering into potentially harmful situations, both...
 
 
Courtesy photograph

Flight tests conclude for shape changing aircraft flap

Courtesy photograph The modified Gulfstream III flight research aircraft with an adaptive compliant wing trailing edge is shown with 25 degrees of trailing edge deflection. A team of researchers from Air Force Research Laborato...
 
 

AFOQT scores updated as AF implements new test, form*

Airmen who took Form S of the Air Force Officer Qualifying Test may see their test scores updated May 22 when the Air Force converts scores to the new Form T metric, officials said May 12. According to Dr. Lisa Hughes, Chief of Air Force Personnel Assessment, all Form S scores in the official database...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>