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![ron_eisele Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::3195245890.png) Ron Eisele [@ron_eisele](/creator/twitter/ron_eisele) on x 61.2K followers
Created: 2025-07-25 20:44:28 UTC

XX July 2010. The sole Sikorsky X2, American experimental high-speed compound helicopter with coaxial rotors, unofficially broke the speed record for rotorcraft, achieving a maximum XXX knots (259 mph) in a one-hour test flight.

![](https://pbs.twimg.com/media/Gwux3dJW0AArFwS.jpg)

XXX engagements

![Engagements Line Chart](https://lunarcrush.com/gi/w:600/p:tweet::1948846838255157454/c:line.svg)

**Related Topics**
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[ron](/topic/ron)

[Post Link](https://x.com/ron_eisele/status/1948846838255157454)