SR-71 pilot tells why the F-15 radar couldn’t see the Blackbird during Eagle Bait sorties

By Linda Sheffield Miller
Aug 20 2026

In this article:

SR-71

The SR-71 Blackbird was so fast that the F-15 Eagle radar couldn’t see it

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

During its operational lifetime, the SR-71 provided intelligence about the Yom Kippur War in 1973, the Israeli invasion of Lebanon in 1982, the US raid on Libya in 1986 and the revelation of Iranian Silkworm missile batteries in 1987. The USAF ceased SR-71 operations in January 1990.

Throughout its nearly 24-year career, the SR-71 remained the world’s fastest and highest-flying operational aircraft. From 80,000 feet, it could survey 100,000 square miles of Earth’s surface per hour. Thus, achieving a radar lock on it was extremely difficult for any hostile fighter.

SR-71 Vs F-14 Vs F-15

Nevertheless, according to former Blackbird driver Col. Richard H. Graham, USAF (Ret.), tells in his book The Complete Book of the SR-71 Blackbird: The Illustrated Profile of Every Aircraft, Crew, and Breakthrough of the World’s Fastest Stealth Jet, there were two fighters that could achieve (simulated) SR-71 kills, but only under certain conditions.

SR-71 pilot recalls accelerating his Habu to Mach 3.2 and denying an F-15 pilot an “easy,” simulated kill on his Blackbird during a training sortie

“Don [Don Emmons was Graham Reconnaissance System Officer or RSO, the Blackbird back seater] and I, as well as many other crewmembers, had flown numerous ‘Tomcat Chase’ and ‘Eagle Bait’ sorties against our best fighters – the Navy’s F-14s and the Air Force’s F-15s. We flew the SR-71 to provide the fighters practice at finding, tracking, locking on, intercepting, and simulated firing of their sophisticated F-14 Phoenix missiles and the F-15’s Sparrow missiles at a high altitude, high speed target. The Tomcat Chase missions were flown over the Pacific Ocean and Eagle Bait missions in the Nellis AFB training area, north of Las Vegas, Nevada.”

Graham continues. “To maximize scarce, high altitude/high-speed intercept practice for the fighters against the SR-71, we stacked the deck in their favor to avoid a multitude of missed intercepts, and consequently, wasted time. The intercepts were conducted in a very controlled environment, favoring a successful outcome by the fighters. […] Even under these highly controlled flying conditions, the F-14s and F-15s had extreme difficulty achieving a satisfactory SR-71 kill.

American fighter pilots were able to lock on the SR-71 only after the Blackbird crew turned off their defensive countermeasures.

It was just about impossible to achieve a lock on the SR-71 unless she had some kind of malfunction.

F-15 radar couldn’t find the Blackbird

SR-71 pilot Dave Peters adds some interesting and hilarious details.

Cool Video Explains how SR-71 Blackbird’s J58 Turbo-Ramjet Engine Works
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‘One of the interesting discoveries from those missions, especially the Eagle Bait, was that they couldn’t even find us when everything was shut down and we told them exactly where we were. It was then realized that the F-15 had a speed gate on their radar at 1500 kts. We were casually warping along from 1850 to 2000. So, for them, we didn’t exist. We flew them fairly regularly from about 82 and they were still doing them after I retired in 86. We flew the Eagle Bait with the F-15s and Tomcat Chase with the F-14s. The 14s could find us but they couldn’t do anything until we modified and gave them times, route of flight, speed and altitude beforehand so they could have a pre-planned setup. The 15s didn’t do that well for quite some time.

‘Another mission we flew that was interesting was to come in over the California coast at speed and altitude to give the air traffic controllers an idea of what they would see on a space shuttle approach.

Animosity

‘There was some animosity at first with both the Eagles and the Tomcats because they kept accusing us of not showing up. It was fun in the vain as the LA speed story, except it’s true, because we were on the same frequency with them and could listen to all the bitching because we didn’t show up. They got a little huffy because nobody told them we weren’t coming.’

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

The SR-71 pilot who flew the Blackbird beyond 90,000 feet with no simulator time to prepare him
The book Ohio to Supersonic: Flying the SR-71 Blackbird to the secret world of the Skunk Works by Colonel Richard “E.” Butch Sheffield and Linda Marie Sheffield will be published soon and is available to pre-order here.

Photo credit: 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.

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