This excellent video from the TED Talks website deals with biomimicry, the concept of getting engineering inspiration from the natural world.

From the abstract: With 3.8 billion years of research and development on its side, nature has already solved problems that human designers and engineers still struggle with.

In this inspiring talk, Janine Benyus provides fascinating examples of biomimicry — the way humans mimic nature in the products we build and the systems we implement. And because the champion adapters in the natural world are, by definition, those that can survive without destroying the environment that sustains them, biomimicry can contribute to the long-term health of our planet.

by Robert C. Truax, January 1999

Copyright © 2000 Aerospace America.   Reprinted with permission.

The story of turbopump rocket development is an interesting one of trial and error. Many sidelines were explored before the objectives of light weight and high performance were finally attained with the main engines for the Shuttle. Russian rocket development followed a somewhat similar path, and the end result was very similar: a topping cycle with high combustion chamber pressures.

But turbopump engines, whether high pressure or low, were a mistake from the very beginning. They simply are not worth what they cost in time and money. In all the early development efforts, pump-fed systems were preceded by a pressure-fed version. In every case, the mission was accomplished and the program goals met before the development of the pump system was completed. After the X-I broke the sound barrier with its pressure-fed rocket engine, who ever heard of the D-558-2 — powered by a pump-fed engine?

Technically simple two-stage launchers with pressure-fed engines and ocean recovery offer the economical operations that have escaped our high-technology turbopump rockets for more than four decades.

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