ER-2

ER-2. The ER-2 is a high-altitude research aircraft operated by the National Aeronautics and Space Administration (NASA). Derived from the famous Lockheed U-2 reconnaissance plane, it serves as a platform for scientific observations in the upper atmosphere and near-space environment. Based at the NASA Armstrong Flight Research Center, the aircraft enables research in fields including atmospheric chemistry, earth sciences, and sensor calibration for satellite missions.

Overview

The ER-2 functions as a crucial airborne science platform for the United States, allowing researchers to collect data at altitudes typically above 65,000 feet. It is a civilian adaptation of the military Lockheed U-2, designed by the legendary Skunk Works team under Clarence "Kelly" Johnson. Operated by NASA's Airborne Science Program, the aircraft can carry a diverse array of scientific instruments in its nose, Q-bay, and underwing pods. Its ability to fly above most weather and commercial air traffic makes it an invaluable tool for validating measurements from orbiting satellites like those in the A-Train constellation and for conducting direct sampling of the stratosphere.

Design and development

The development of the ER-2 was a direct response to NASA's need for a high-altitude research capability following the retirement of earlier aircraft like the RB-57F Canberra. NASA acquired two U-2 aircraft from the United States Air Force in 1981 and modified them for scientific duties. Key modifications included redesigning the cockpit for single-pilot operation during long-duration missions and extensively re-engineering the airframe to accommodate modular instrument payloads. The design team, leveraging the original Skunk Works engineering, strengthened the wings and empennage to handle increased gross weights from scientific equipment. The program has been managed from facilities at the NASA Armstrong Flight Research Center and supported by engineers from Lockheed Martin.

Operational history

Entering service in 1981, the ER-2 quickly became a workhorse for major scientific campaigns. Its early missions supported studies of atmospheric phenomena, such as the Airborne Antarctic Ozone Experiment in 1987, which provided critical data on the ozone hole. Throughout the 1990s and 2000s, the aircraft participated in numerous global experiments, including the STRAT Campaign and missions supporting the Earth Observing System. It has deployed worldwide, operating from locations like Barbers Point in Hawaii, Fairbanks in Alaska, and Kiruna in Sweden. The aircraft continues to be actively deployed, with recent campaigns focusing on climate science, storm penetration studies for projects like HS3, and calibration for instruments on the International Space Station.

Specifications (ER-2)

* **Crew:** 1 * **Length:** 63 ft (19.2 m) * **Wingspan:** 104 ft (31.7 m) * **Height:** 16 ft (4.88 m) * **Empty weight:** 11,000 lb (4,990 kg) * **Max takeoff weight:** 40,000 lb (18,144 kg) * **Powerplant:** 1 × General Electric F118 turbofan engine * **Maximum speed:** 430 knots (495 mph, 797 km/h) * **Service ceiling:** 70,000 ft (21,300 m) * **Range:** 4,000 nmi (4,600 mi, 7,400 km) * **Endurance:** Over 12 hours

Notable missions and research

The ER-2 has been central to landmark scientific investigations. It played a pivotal role in the 1987 Airborne Antarctic Ozone Experiment, directly measuring chlorine compounds that cause ozone depletion. During the 1991 Airborne Arctic Stratospheric Expedition, it studied similar processes over the North Pole. The aircraft has also been used extensively for earth science, mapping natural disasters like the eruption of Mount Pinatubo and studying hurricane dynamics for NASA's Hurricane and Severe Storm Sentinel project. Furthermore, it serves as a vital underflight calibration platform for satellites, including Terra, Aqua, and the Landsat program, ensuring the accuracy of long-term climate data records.

Category:United States research aircraft Category:High-altitude and long endurance aircraft Category:NASA aircraft