Rare Air Force Stealth Measurement 737 Makes Public Appearances

The NT-43A stealth measurement platform, normally kept under wraps in Nevada, made a daylight flight to Arkansas last week.

Screenshot/YouTube/MegaProjects

One of the Air Force’s least photographed airframes was front and center and seemingly posing for pictures and videos last week as it left its normal haunts in the Nevada Test and Training Range for a broad-daylight trip to a civilian airport in Bentonville, Arkansas. The NT-43A radar cross section measurement aircraft even stopped for fuel on the return trip at the airport in Amarillo after visiting Bentonville. The aircraft itself offers some insight into just how long the Air Force may have been measuring stealth. It’s based on a first-generation Boeing 737-200, a turbojet-powered baby Boeing that first flew in the 1960s. Only a handful of those aircraft are still in service, most in the far North where the certified gravel kit available only on that model of 737 comes in handy for the unimproved runways at some airports and mines in the Canadian and Alaska Arctic.

As is evident from the close-ups from last week, there is some interesting stuff going on under the various fairings and extensions, but it could be that just about everything that can be discerned from the distinctly utilitarian modifications has already been figured out. For what it’s worth, The War Zone has deduced that the ancient 737 needed some kind of maintenance that couldn’t be done at its usual digs at Tonopah and Groom Lake ranges. The only other time the plane has ventured out of that zealously guarded airspace was to Admore Municipal Airport in Oklahoma in 2022. Both Bentonville and Admore are home to maintenance and modification facilities operated by King Aerospace, which does work for the Air Force and seems to specialize in old 737s.

Russ Niles

Russ Niles is Editor-in-Chief of AVweb. He has been a pilot for 30 years and joined AVweb 22 years ago. He and his wife Marni live in southern British Columbia where they also operate a small winery.

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Replies: 6

  1. Wow, thanks.

    There are several B737-200s operating in northern Canada, because of the gravel runway kit that apparently only exists for the -200.
    Most probably are the Convertibles, cargo-pax configuration.

    Destinations may include Cambridge Bay, Resolute Bay, and resource sites such as diamond mines.

    B737s because they are fast compared to prop aircraft. (Herc is fairly fast at medium altitudes but not certified for pax, L188 Electra fairly fast at medium altitudes but not desirable (some still fighting forest fires, Airspray of Edmonton has 14, but jets win by going high and fast.)

  2. I think the gerbils are on a special diet and are exclusively restricted to this while they power the “ageless” Fat Albert. Paint job should include radar absorbing paint at the next refit/major inspection. Might be an opening for older bizjets here as well. Still think a fabric covered AN2 might be the “Stinker” here with it’s hug the earth altitude capability and it’s ability to fly sower than a police radar detector.

  3. It’s “Ardmore,” Oklahoma, not “Admore.” I flew at Vance AFB for a year, so I remember Ardmore. And Pond Creek, and Waukomis, and Dogface, the aux field pattern at Kegelman.

  4. Ardmore..turbulence… New puppy getting G’s and a runway with an X. Oklahoma.. Gusty memories.

    Isn’t that the place with the small museum on field?

  5. The gravel kit includes:

    • a flat plate around the nose gear tires near ground, to keep them from throwing pebbles toward engines
    • an air boom projecting from bottom of nacelle to disrupt the vortex that occurs from inlet at low speed. (You can see it in rain, obvious on 727 center engines from terminal windows.)
      Miscellaneous hardening of surfaces pebbles would impinge on..
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