In the late 2000s, XCOR Aerospace, a California-based company specializing in reusable rocket technology, embarked on a series of wind tunnel tests to refine the aerodynamic design of its Lynx suborbital launch vehicle. These tests were conducted in collaboration with the U.S. Air Force Research Laboratory (AFRL) at Wright-Patterson Air Force Base in Ohio, utilizing the AFRL's wind tunnel facilities. ([wpafb.af.mil](
The Lynx Suborbital Launch Vehicle
The Lynx was envisioned as a two-seat, single-stage, horizontal-takeoff, horizontal-landing (HTHL) suborbital spaceplane. Designed to carry a pilot and one passenger or payload to the edge of space and back, the Lynx aimed to provide a cost-effective and reusable means of suborbital flight. The vehicle was intended to operate multiple times a day, leveraging non-toxic, reusable rocket engines to minimize operational costs. ([en.wikipedia.org](
Collaboration with the U.S. Air Force Research Laboratory
In 2009, XCOR Aerospace entered into a Cooperative Research and Development Agreement (CRADA) with the AFRL to conduct subsonic wind tunnel tests of the Lynx's aerodynamic design. This collaboration aimed to validate the vehicle's aerodynamic properties and gather data to inform future space access systems. The tests were performed using an all-metal 1/16th-scale model of the Lynx, allowing engineers to analyze airflow characteristics and make necessary design adjustments. ([wpafb.af.mil](
Wind Tunnel Testing at Wright-Patterson Air Force Base
The wind tunnel tests at Wright-Patterson Air Force Base were a critical component of the Lynx development program. By subjecting the scale model to controlled airflow conditions, engineers could observe and measure aerodynamic forces and moments acting on the vehicle. This empirical data complemented computational fluid dynamics simulations, providing a more comprehensive understanding of the Lynx's aerodynamic behavior. The collaboration with the AFRL not only benefited XCOR Aerospace but also contributed valuable insights to the broader aerospace community. ([wpafb.af.mil](
Subsequent Testing and Development
Following the subsonic wind tunnel tests, XCOR Aerospace continued to refine the Lynx's design through additional testing phases. In 2010, the company completed primary supersonic wind tunnel tests at NASA's Marshall Space Flight Center (MSFC) in Huntsville, Alabama. These tests focused on the vehicle's performance at higher speeds, providing data to ensure stable and controllable flight throughout the range of Mach numbers and angles of attack required for the Lynx mission. ([space-travel.com](
Despite these advancements, the Lynx program faced several challenges, including technical hurdles and funding constraints. By 2016, XCOR Aerospace had ceased operations, and the Lynx project was discontinued. The company's assets were acquired by Stratolaunch Systems, which continued to develop other aerospace technologies. ([en.wikipedia.org](
Legacy and Impact
Although the Lynx program did not culminate in operational flights, the wind tunnel testing conducted in collaboration with the AFRL provided valuable data that contributed to the understanding of suborbital vehicle aerodynamics. The insights gained from these tests have informed the design and development of subsequent suborbital and orbital vehicles, influencing the trajectory of commercial spaceflight. The partnership between XCOR Aerospace and the AFRL exemplifies the potential benefits of collaboration between private aerospace companies and government research institutions in advancing aerospace technology.