The SR 71, designed in the 1950′s used radar absorbing materials. « The HabitableZone

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The SR 71, designed in the 1950's used radar absorbing materials. May 13, 2022 8:39 pm RobVG

I’ve told the story of the older gentleman who gave me a private guided tour of the M21 displayed at the Boeing Museum of flight. He pointed out RAM on the leading edges of the wings. I’ve only now been able to confirm it.

So we've known about stealth tech since the 1950s... by ER 2022-05-14 05:32:21
- I've always been fascinated with anything about the plane. by RobVG 2022-05-14 15:31:15
  - Finished the book. by RobVG 2022-05-18 11:10:41
- Development of RAM coatings started in the 1930's. by RobVG 2022-05-14 12:37:20