SR-71 Blackbird Vs A-12 Oxcart: project Nice Girl, the recon fly off between the SR-71 and the A-12 and why the Blackbird was chosen over the Oxcart

By Linda Sheffield Miller
Aug 15 2025

In this article:

SR-71 Blackbird Vs A-12 Oxcart

SR-71 Blackbird Vs A-12 Oxcart: project Nice Girl, the recon fly off between the SR-71 and the A-12 and why the Blackbird was chosen over the Oxcart

The SR-71, unofficially known as the “Blackbird,” is a long-range, advanced, strategic reconnaissance aircraft developed from the Lockheed A-12 Oxcart.

The A-12 was operated by CIA but its operational lifetime was short-lived because the CORONA reconnaissance satellite, which was first launched in June 1959, began providing worldwide imagery without much of the risk associated with airborne reconnaissance. At the same time, the SR-71 began operations with the US Air Force (USAF), leading to the A-12’s retirement in 1968.

T-shirts Habubrats 2
CLICK HERE to see The Aviation Geek Club contributor Linda Sheffield’s T-shirt designs! Linda has a personal relationship with the SR-71 because her father Butch Sheffield flew the Blackbird from test flight in 1965 until 1973. Butch’s Granddaughter’s Lisa Burroughs and Susan Miller are graphic designers. They designed most of the merchandise that is for sale on Threadless. A percentage of the profits go to Flight Test Museum at Edwards Air Force Base. This nonprofit charity is personal to the Sheffield family because they are raising money to house SR-71, #955. This was the first Blackbird that Butch Sheffield flew on Oct. 4, 1965.

Project “Nice Girl”

Why was the SR-71 Blackbird chosen over the A-12 Oxcart?

From Oct. 20 to Nov. 3, 1967 the A-12 and the SR-71 were pitted against each other in a recon fly off, code named “Nice Girl” over the US that included refueling, flying identical routes 1 hour apart on three different days and both would complete the full sortie with collection sensors operational.

SR-71 Blackbird Vs A-12 Oxcart: project Nice Girl, the recon fly off between the SR-71 and the A-12 and why the Blackbird was chosen over the Oxcart

On the first attempt, the SR-71 was OK but the A-12 had a problem. On the 2nd day, the reverse was the case; on day 3, both aircraft successfully flew the route, on that day, it was under-cast for the northern part (from California to Kentucky) and the A-12 could only photograph clouds while the SR-71 was able to collect ELINT and SLR data. After air refueling, both accelerated and climbed over the Gulf of Mexico. From New Orleans to the San Francisco area, the weather was CAVU and both aircraft were able to provide their full collection capability/data for the evaluation.

The aircrews that took part in the program were:

  • Lt. Col. Al Hichew and I, Maj. Tom Schmittou flew mission #1.
  • Maj. John Storrie and Maj. Coz Mallozzi flew mission #2
  • Maj. Bill Campbell and Capt. Al Pennington flew mission #3.
  • Jack Weeks flew all three A-12 missions.

A better overall investment

SR-71 art
This print is available in multiple sizes from AircraftProfilePrints.com – CLICK HERE TO GET YOURS.  Dawn at 80.000ft – SR-71 Blackbird

The first two flight days were inconclusive. After the third day of flights, it was determined by Intelligence evaluators that the SR-71 was a better overall investment. A-12s had much better cameras – wider swath and higher resolution but the SR-71 collected more types of intelligence than the CIA aircraft could. These other sensors were infrared detectors, side looking airborne radar, and ELINT-collection devices needed for the SR-71 mission of post-nuclear-strike reconnaissance.

The conclusion was they picked the SR-71 to continue flying. The A-12s were retired. The A-12s were put in hangars until 1984.

Be sure to check out Linda Sheffield Miller (Col Richard (Butch) Sheffield’s daughter, Col. Sheffield was an SR-71 Reconnaissance Systems Officer) Twitter X Page Habubrats SR-71, Instagram Page SR71Habubrats and Facebook Page Born into the Wilde Blue Yonder Habubrats for awesome Blackbird’s photos and stories.

Cool Video Explains how SR-71 Blackbird’s J58 Turbo-Ramjet Engine Works
This model is available in multiple sizes from AirModels – CLICK HERE TO GET YOURS.

Photo credit: Lockheed Martin and U.S. Air Force

Linda Sheffield Miller

Linda Sheffield Miller

Linda Sheffield co-author of Helion’s new book “Ohio to Supersonic: Flying the SR-71 to the Secret World of the Skunk Works,” Linda helped bring her father, SR-71 RSO, Col. Richard “Butch” Sheffield's book to life. Linda grew up on Air Force bases primarily at Beale Air Force Base California. The home of the SR -71. Linda is a graduate of North Dakota State University and taught public school for over a decade as a substitute teacher. Linda writes daily about the SR -71 the A-12 and the U-2 on her various social media accounts. Linda lives in the suburbs of Washington DC with her husband Rodney Miller, they are the parents of three daughters and four grandsons. She is the co-founder of the SR-71 group, Habubrats. Linda has been asked to write articles for the Distinguished Flying Cross magazine, and the Evergreen Museum newsletter. Linda enthusiastically enjoys contributing articles weekly to The Aviation Geek Club.

Linda Sheffield Miller: All articles

Back to top