![D-558-I is on the ramp at South Base, Edwards Air Force Base with three crew members.](https://www.nasa.gov/wp-content/uploads/2023/03/304724main_E49-059_full.jpg)
Where Are They Now: D-558-I #1
The D-558-I "Skystreaks" were among the early transonic research airplanes like the X-1, X-4, X-5, and XF-92A.
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https://www.nasa.gov/image-detail/where-are-they-now-d-558-i-1/
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The D-558-I "Skystreaks" were among the early transonic research airplanes like the X-1, X-4, X-5, and XF-92A.