Sei a conoscenza di qualche tecnologia perduta del 1969? C'è stato qualche regresso tecnologico forse, che tu sappia?

In 1983 Alexander Onoprienko graduated from the Moscow Institute of Physics and Technology, a leading Russian university, majoring in Aerodynamics. For some time he was a researcher at the Central Aerohydrodynamic Institute then at the Zhukovsky Air Force Engineering Academy – the world’s largest and oldest scientific school of aeronautics.
Since 1993, Alexander Onoprienko has been a company CEO and entrepreneur. The scope of his interests include social management, social evolution, and evolution.
Alexander has a blog on these topics. His key subjects are instruments of biological and social evolution; the meaning of evolution, and the meaning of life.

The F-1 is a gas-generator cycle rocket engine developed by Rocketdyne in the late 1950s and used in the Saturn V rocket in the 1960s and early 1970s. Five F-1 engines were used in the S-IC first stage of each Saturn V, which served as the main launch vehicle in the Apollo program. The F-1 is still the most powerful single-chamber liquid-fueled rocket engine ever developed.[1] The RD-171 has around 20% more thrust, using a cluster of four smaller combustion chambers and nozzles.[2]

This situation pertains, despite the fact that Saturn V with its F1 technology was allegedly more advanced than the one used in RD-170. At comparable thrust, the F1 engine had one chamber and the RD-170 had four. All other things being equal, single-chamber engines have better weight characteristics, and they are smaller in size. But on the other hand, a larger combustion chamber makes it more difficult to ensure combustion stability. Soviet and later Russian engine specialists have been unable to design a single-chamber engine in any way comparable to the F1.

During the 1960s, Rocketdyne undertook uprating development of the F-1 resulting in the new engine specification F-1A. While outwardly very similar to the F-1, the F-1A was more powerful, producing a thrust of about 8 MN in tests,[10] and would have been used on future Saturn V vehicles in the post-Apollo era. However, the Saturn V production line was closed prior to the end of Project Apollo and no F-1A engine flew on a launch vehicle.[11]

There were proposals to use eight F-1 engines on the first stage of the Nova rocket. Numerous proposals have been made from the 1970s on, from the Saturn-Shuttle concept to the present day, to develop new expendable boosters based around the F-1 engine design, including one in 2013,.[11] As of 2013, none has proceeded beyond the initial study phase.

The F-1 remained the most powerful liquid-fuel rocket engine at 6.7 MN of thrust at sea level until overshadowed by the RD-170 from the Soviet Union. The RD-170 uses a cluster of four separate combustion chambers and nozzles driven by a single turbopump. It visually appears to be a cluster of four engines, not a single engine. Viewed as a single engine it is the most powerful liquid-fuel rocket engine ever flown. The F-1 still holds the crown of largest single-chamber, single-nozzle liquid fuel engine flown. However among solid-fuel engines, more powerful engines exist, such as the Space Shuttle Solid Rocket Booster, with a sea-level liftoff thrust of 12.45 MN.