RD-270 rocket engine. The massive UR-700 and the UR-900 were going to use this as their first stage engine. It had a slightly lower thrust than the F-1 while having a much higher specific impulse than the F-1. Sad that this never left the pad... [600x900]
![RD-270 rocket engine. The massive UR-700 and the UR-900 were going to use this as their first stage engine. It had a slightly lower thrust than the F-1 while having a much higher specific impulse than the F-1. Sad that this never left the pad... [600x900]](https://images.scrolller.com/zepto/rd-270-rocket-engine-the-massive-ur-700-and-the--3f8hwx5pc7-108x162.webp)
